How To Protect Your Computer From Viruses?

What is a computer virus and how do you get one?

If you depend on the information stored on your personal computer, you need to understand how computer viruses spread, and you should use anti-virus software to reduce the chance that a computer virus will infect your programs and files.

A computer virus is a program that makes copies of itself and infects files. Computer viruses can spread to other computers and files whenever infected files are exchanged. Often infected files come as email attachments, even from people you know. The email senders have no idea that they are passing on a file with a virus in it.

Some computer viruses can erase or change the information stored on your computer, other viruses may do little or no harm to your system. Writing and releasing any virus is prohibited by university policy, and anyone who does so will be held legally accountable for damages.

How to protect your computer?

There are several things that you should do to protect your computer from virus infections:

  • Use a high-quality anti-virus program, and be sure to update it regularly. Use it to scan any files, programs, software, or diskettes (even new software from a commercial company) before you use them on your computer.
  • Make back-up copies of important documents or files and store them on separate diskettes. Making backups will also protect your information against accidental file deletion, diskette failure, and other damage.
  • Whenever you use a computer in a campus lab, be sure to reboot or run “cleanup” before you start your session and log out when you end your session.
  • Do not share commerical software with anyone. It is a violation of the author’s copyright to distribute such material, and it is a way to spread viruses.
  • When you get public domain (PD) software for which the author has granted permission to make copies, get it from a reliable source. (For example, and individual you do not know is not a reliable source.) Before you run PD material, use an anit-virus program to inspect for known viruses.
  • Always scan your disks and files after using them on another computer.
  • Always scan all files you download from the Internet.
  • Always scan Word or Excel file email attachments before you read them.

What if your computer gets a virus?

Not all damage to your programs and files is caused by viruses: worn out floppies, failing hard drives, user error, and poorly written programs can all cause you to lose data. If your computer is behaving strangely, or if you think your computer has a virus, use an anti-virus program to find out.

If your computer is infected with a virus, DON’T PANIC! Use an anti-virus program to remove the virus yourself, or turn your computer off and find someone who knows how to remove the virus.

If a virus is active in memory, it may prevent anti-virus programs from working correctly. To be sure no virus is active, turn off your computer and reboot from a known-clean system diskette before you begin the disinfection process.

Eliminate all copies of the virus as quickly as possible. Check all your diskettes, and warn anyone else who may have infected files or disks.

Remember, most viruses can be removed without permanent damage to your system, and most virus infections can be prevented. With proper care, your computer can remain virus-free.

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Top Backup Services And Charge

Backup Services www.mozy.com
Disk Space: Unlimited
Price:
MozyHome: $4.95/month
MozyPro:
Desktop Licenses: $3.95+$0.50/GB/month
Server Licenses: $6.95 + $0.50/GB /month
Home User: 2GB Free
(Get one month FREE when you sign up for an annual account or three months FREE with a biennial subscription.)
Trail: Yes
Mac: Yes

www.carbonite.com
Disk Space: Unlimited
Price:
Three Year Subscription: $129.95/Year
Two-Year Subscription: $99.95/Year
Two-Year Subscription: $54.95/Year
Trail: Yes
Mac: Yes

www.sosonlinebackup.com
Disk Space:
Price:
SOS Home Edition:
2 GB USD 19.95/Year
5 GB USD 29.95/Year
15 GB USD 49.95/Year
SOS Business Edition:
500 MB USD 4.50/Year
2 GB USD 36.00
10 GB USD 180.00
…….
Trail: Yes
Mac: No

www.idrive.com
Disk Space:
Price:
Idrive Basic: 2GB Free
Idrive Pro:
150 GB USD 49.50/Year (Personal Use)
500 GB USD 149.50/Year (Family Pack Up to 5 PCs)
Idrive Pro For Business
50 GB USD 99.50
100 GB USD 199.50
500 GB USD 499.50
Trail: Yes
Mac: Yes

www.backupandshare.com
Disk Space: Unlimited
Price:
Indivitual:
10 GB USD 49.95/Year
Business:
Unlimited USD 150.00/Year
Trail: No
Mac: Yes

www.keepit.com
Disk Space: Unlimited
Price: 4.95 $/month
Trail: 30 days money back
Mac: No

www.elephantdrive.com
Disk Space: Unlimited
Price:
Home User: 49.95 $/year (2 months free)
Home Plus Edition: 99.95 $/year (2 months free 4 computers)
Pro Edition: 349.95/year (2 months free 10 computers)
Pro Plus Edition: 99.95/month (20 computers)
Trail: Yes
Mac: No

www.memopal.com
Disk Space:  150GB
Price:
Personal:
150GB 49€/year
250GB 69€/year
Business:
49€(10GB) + 2.4€/GB per Year
Trail: Yes
Mac: Yes

www.symantec.com
Disk Space: 25GB
Price: $49.99/Year
Trail: Yes
Mac: No

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Which Backup Media Should You Use?

Using external hard drives for data backups

For small businesses, buying and using an external hard drive for data backups is the method I recommend. External hard drives are cheap compared to tape drive systems ; you can get one for several hundred dollars. They’re also easy to use; in many cases, all you have to do is plug the hard drive into your computer’s USB port. And while hard drives do fail, their failure rate is much lower than that of backup media such as CDs.

Using CD-Roms as data backups
Using CD-Roms as data backups is popular. Blank CDs are inexpensive, and copying data onto CDs is easy. However, this is the most unreliable method of all the data backup methods listed here. Who hasn’t had the experience of putting a CD into a drive only to find that the data is unreadable and the disk “doesn’t work”? CDs, like the floppy disks they’ve replaced, have a limited shelf life. I don’t recommend this method of data backup for any small business. If you are writing your data backup files onto CDs, make sure that you make (and keep) multiple copies over time.

Using tapes as data backups
Tape backups are ten thousand times as reliable as CD-Roms, but tape drives and their associated media are much more expensive than CD-Rom writers and CDs. A good tape drive can still cost over $1000, and individual tapes for the drive can cost up to $40 each. If you can afford the equipment, however, tape backup is far and away the best backup method.

Using Online backup services as data backups
There are many companies offering online backup services, but I can’t recommend this method. Besides the potential of bandwidth problems, there are just too many security issues that have yet to be dealt with. Firstly, the method is only as reliable as the company offering the online backup service, and Internet service companies have been coming and going faster than the common cold lately. Secondly, if your business data is sensitive, (and whose isn’t?), why would you want to put it on the ‘Net?

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Weekly Hard Disk Drive Prices for Nov 02, 2009

Hard Disk Drive Price This post will provide some prices information about hard disk drives. These informations are mainly from NEWEGG.COM and EWIZ.COM, Both of them are engaged in computer parts, notebook computers, system software and other computer products sales. They have good reputation and also they provide “the best prices”.

Seagate Barracuda 7200.12 1TB 3.5″ SATA 3.0Gb/s Internal Hard Drive -Bare Drive
$89.99
From: NEWEGG.COM

Seagate 1TB 3.5″ External Hard Drive – Retail
$99.99
From: NEWEGG.COM

Seagate ST31000528AS 1TB SATA2 7200rpm 32MB Hard Drive
$89.50
From: EWIZ.COM

Seagate Barracuda 7200.12 320GB 3.5″ SATA 3.0Gb/s Internal Hard Drive -Bare Drive
$49.99
From: NEWEGG.COM

Western Digital Caviar Green 1TB 3.5″ SATA 3.0Gb/s Internal Hard Drive -Bare Drive
$84.99
From: NEWEGG.COM

Western Digital Elements 640GB 2.5″ Midnight Black Portable Hard Drive – Retail
$119.99
From: NEWEGG.COM

HITACHI Deskstar 2TB 3.5″ SATA 3.0Gb/s Internal Hard Drive –Retail
$179.99
From: NEWEGG.COM

HITACHI SimpleDrive 1TB External Hard Drive – Retail
$89.99
From: NEWEGG.COM

Samsung 320GB (HM320JI) 5400rpm SATA 8MB Notebook Hard Drive (2.5 inch)
$58.99
From: EWIZ.COM

Fujitsu 320GB 2.5″ SATA 3.0Gb/s Internal Notebook Hard Drive -Bare Drive
$59.99
From: NEWEGG.COM

iomega Select 1TB 3.5″ External Hard Drive – Retail
$89.99
From: NEWEGG.COM

iomega Select 320GB 2.5″ Portable Hard Drive – Retail
$59.99
From: NEWEGG.COM

Fantom Drives G-Force 2TB 3.5″ External Hard Drive – Retail
$179.99
From: NEWEGG.COM

Cavalry CAXB 2TB 3.5″ Black External Hard Drive – Retail
$189.99
From: NEWEGG.COM

Note: All the informations below are only for reference, if you want to get the latest prices, please refer to their websites.

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3 Steps to Successful Data Backup

Data Backup Data protection is crucial for protecting your business’s continuity. If your only data backup is on a computer, and the hard disk fails or is damaged by a power surge, your business data is gone. And having paper copies of business data isn’t adequate data protection; what if your business premises burn to the ground or experience severe flooding? Once again the data you need to carry on your business could be irretrievably lost.

For adequate data protection, you need to establish a data backup system that follows these three steps:

  • archive business data regularly;
  • create data backups on reliable media;
  • keep updated data backups in a secure, off-site location.

The basic rule for business data protection is that if losing the data will interfere with doing business, back it up. You can reinstall software programs if you need to, but recovering the details of transactions or business correspondence is impossible if those files are lost or damaged beyond repair. The rest of this article outlines each of the steps listed above so you can establish a data backup system that will effectively protect your critical business data from disaster.

1) Archiving Critical Business Data

Archiving business data is more than a matter of good housekeeping; it could be a matter of your business’s survival. There are two steps to archiving business data for successful data backup;

  • identifying the critical data that needs to be archived
  • and using a data archiving method on a regular schedule.

What needs to be archived in a data backup? Executables, such as software programs, don’t need to be. You don’t create new versions of executable programs and, as I’ve said, if a software program was lost or corrupted, you could reinstall it fairly easily.

However, all of the files that you’ve created and/or modified should be regularly backed up. For many businesses, this includes everything from accounting files through email.

You can simplify your backup archiving by keeping all the files that will need to be archived on a single drive on your computer. For instance, suppose I need to back up accounting files, word-processing documents, spreadsheets, photo and email. Putting Simply Accounting, Microsoft Office (including Outlook) and Paintshop Pro all on the D:/ drive makes it easier for me to archive all the files I’ve created or modifed using those programs. All I have to do is back up the drive. While I don’t have to back up executables, it doesn’t hurt them if I do.

Once you’ve selected the critical data to be archived, it’s a simple matter to install and use a backup software program to archive your business data on a regular schedule.

I recommend backing up your data nightly. There are many backup software programs available that allow you to set a schedule that will archive your data automatically. Look for backup software that zips and encrypts files to save disk space and increase data security.

If possible, backup over your computer network, keeping your data backup files on a separate hard drive from the original files. If this isn’t possible because you have a stand-alone computer, put your data backup files in a separate directory, and increase your schedule for creating physical backups.

The second step of data protection is creating data backups – not just once, but on a regular schedule. But before you do this, you need to be aware of the different backup systems available and the limitations of some backup media.

2) Creating Physical Data Backups

Physical data backups are necessary because of the possibility of computer failure or damage. Even a minor accident such as spilling a cup of coffee onto your laptop could destroy all your data, if that’s the only place your data resides. You should create physical data backups of your business data at least once a week, or even more often if your business generates large amounts of new data daily. There are several methods of transferring your backup files to another media, but some data backup systems are more reliable than others.

Which backup media should you use?

Using CD-Roms as data backups
Using CD-Roms as data backups is popular. Blank CDs are inexpensive, and copying data onto CDs is easy. However, this is the most unreliable method of all the data backup methods listed here. Who hasn’t had the experience of putting a CD into a drive only to find that the data is unreadable and the disk “doesn’t work”? CDs, like the floppy disks they’ve replaced, have a limited shelf life. I don’t recommend this method of data backup for any small business. If you are writing your data backup files onto CDs, make sure that you make (and keep) multiple copies over time.

Using tapes as data backups
Tape backups are ten thousand times as reliable as CD-Roms, but tape drives and their associated media are much more expensive than CD-Rom writers and CDs. A good tape drive can still cost over $1000, and individual tapes for the drive can cost up to $40 each. If you can afford the equipment, however, tape backup is far and away the best backup method.

Using external hard drives for data backups

For small businesses, buying and using an external hard drive for data backups is the method I recommend. External hard drives are cheap compared to tape drive systems ; you can get one for several hundred dollars. They’re also easy to use; in many cases, all you have to do is plug the hard drive into your computer’s USB port. And while hard drives do fail, their failure rate is much lower than that of backup media such as CDs.

Using Online backup services as data backups
There are many companies offering online backup services, but I can’t recommend this method. Besides the potential of bandwidth problems, there are just too many security issues that have yet to be dealt with. Firstly, the method is only as reliable as the company offering the online backup service, and Internet service companies have been coming and going faster than the common cold lately. Secondly, if your business data is sensitive, (and whose isn’t?), why would you want to put it on the ‘Net?

3) Off-Site Data Backup

The only businesses that should be keeping their data backups on-site are those with fire-proof, indestructible safes. Investing in a tape drive or external hard drive and meticulously adhering to a regular data backup schedule won’t help if all your data backup copies are in one place and that place is struck by disaster. You must store copies of your backups off-site if your business data is to be truly secure.

Many businesses keep their data backup copies in security boxes at banks. (The fee for a security box is tax-deductible, if you need further incentive.) Some small business owners keep multiple data backup copies of their records at the homes of different friends or family members. It doesn’t really matter where you choose to keep them, as long as the site you choose for off-site data backup is secure and you have regular access to it.

Don’t run the risk of losing your business data. The best defense against such a disaster is proper data protection. By creating a backup system that includes archiving and backing up your business data regularly and properly, you’ll ensure that your business will be able to weather whatever storm it faces and carry on.

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4 Steps To Create Your Disaster Recovery Plan

Disaster Recovery Plan When disasters strike unprepared companies the consequences range from prolonged system downtime and the resulting revenue loss to the companies going out of business completely,  yet many IT shops are not prepared to deal with such scenarios. How would you recover your data and keep the business running after an unforeseen disaster?

The key to surviving such an event is a business continuity strategy, a set of policies and procedures for reacting to and recovering from an IT-disabling disaster, and the main component of a business continuity strategy is a disaster recovery plan (DRP).

Step 1: Risk Analysis
The first step in drafting a disaster recovery plan is conducting a thorough risk analysis of your computer systems. List all the possible risks that threaten system uptime and evaluate how imminent they are in your particular IT shop. Anything that can cause a system outage is a threat, from relatively common manmade threats like virus attacks and accidental data deletions to more rare natural threats like floods and fires. Determine which of your threats are the most likely to occur and prioritize them using a simple system: rank each threat in two important categories, probability and impact. In each category, rate the risks as low, medium, or high.

For example, a small Internet company (less than 50 employees) located in California could rate an earthquake threat as medium probability and high impact, while the threat of utility failure due to a power outage could rate high probability and high impact. So in this company’s risk analysis, a power outage would be a higher risk than an earthquake and would therefore be a higher priority in the disaster recovery plan.

Step 2: Establish the Budget
Once you’ve figured out your risks, ask ‘what can we do to suppress them, and how much will it cost?’ Can I detect a threat before it hits? How do I reduce the potential of it occurring? How do I minimize its impact to the business? For example, our small California Internet company could employ an emergency power supply to mitigate its power outage threat and have all its data backed up daily on RAID tapes, which are stored at a remote site in case of an earthquake. The more preventative measures you establish upfront the better. Emerson says, “dollars spent in prevention are worth more than dollars spent in recovery.”

The results of Step 1 should be a comprehensive list of possible threats, each with its corresponding solution and cost. It is imperative that IT presents all of these threats to the business operations units, so they can make an informed decision regarding the size of the disaster recovery budget (i.e., which risks the company can afford to tolerate and which it must pay to mitigate). Emerson believes IT “falls down” in its failure to communicate the real risks for system downtime to the business operations units of their companies. He says, “It’s okay for operations to say no; it’s not okay for IT not to let them know the risks.”

A good place to begin is by presenting the cost of downtime to the business. How long can your business afford to be without its computer systems should one of your threats occur?

Ultimately, the business operations unit decides which threats the business can tolerate. According to Emerson, when developing a DRP, IT departments are “shooting in the dark without those business indications.” Both IT and the business units must agree on which data and applications are most critical to the business and need to be recovered most quickly in a disaster. The management of our small Internet company, for example, may decide they can supply the budget only for the emergency generators and the company will have to assume the risk of an earthquake.

Disaster recovery budgets vary from company to company but they typically run between 2 and 8 percent of the overall IT budget. Companies for which system availability is crucial usually are on the higher end of the scale, while companies that can function without it are on the lower end. However, these percentages may be too small. For a large IT shop 15 percent is a best practice rule of thumb according to Emerson.

Step 3: Develop your Disaster Recovery Plan
The feedback from the business units will begin to shape your disaster recovery plan procedures. If, for example, they determine that the company must be up within 48 hours of an incident to stay viable, then you can calculate the amount of time it would take to execute the recovery plan and have the business back up in that timeframe. Emerson suggests that you have the recovery systems tested, configured, and retested 24 hours prior to launching them. He says the set up takes anywhere from 40 hours to days to complete.

The recovery procedure should be written in a detailed plan or “script.” Establish a Recovery Team from among the IT staff and assign specific recovery duties to each member. The manner in which your team conducts its recovery probably will be no different than its regular production procedures: the chain of command likely won’t change and neither will the aspects of the network for which each member is responsible.

Define how to deal with the loss of various aspects of the network (databases, servers, bridges/routers, communications links, etc.) and specify who arranges for repairs or reconstruction and how the data recovery process occurs. The script will also outline priorities for the recovery: What needs to be recovered first? What is the communication procedure for the initial respondents? To complement the script, create a checklist or test procedure to verify that everything is back to normal once repairs and data recovery have taken place.

Step 4: Test, Test, Test
Once your Disaster Recovery Plan is set, test it frequently. Eventually you’ll need to perform a component-level restoration of your largest databases to get a realistic assessment of your recovery procedure, but a periodic walk-through of the procedure with the Recovery Team will assure that everyone knows their roles. Test the systems you’re going to use in recovery regularly to validate that all the pieces work. Always record your test results and update the DRP to address any shortcomings.

As your business environment changes, so should your Disaster Recovery Plan. Reexamine the plan every year on a high level: Do you still need every part of the plan? Do you need to add to it? Will the budget need to be adjusted to accommodate changes to the plan? As applications, hardware, and software are added to your network, they must be brought into the plan. New employees must be trained on recovery procedures. New threats to business seem to pop up every week and a sound DRP takes all of them into account.

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Data Storage Solutions: USB vs. FireWire

Data Storage Solutions What is USB 2.0?
USB 2.0 is the industry standard peripheral connection type for most x86 computers (Windows based). This specification is rated with maximum transfer rate of 480Mb/s (60MB/s). Sustained transfer rate of USB 2.0 depends on many factors including type of device in use, data being transferred, and speed of the computer system. A normal sustained data transfer rate for USB 2.0 ranges from 10-30 MB/s. Only burst data transfers can reach the 480Mb/s rate.

What are the benefits of USB 2.0?

  • USB 2.0 (and earlier 1.1 version ) is “hot swappable,” eliminating the need to reboot or restart your computer when attaching a device.
  • There’s no need for terminators, memory addresses or ID numbers with USB devices.
  • Various sorts of devices can plug into a USB port: external hard drives, digital cameras, printers, Zip drives, SuperDisk drives, floppy drives, mice, keyboards, etc.

What is FireWire?
FireWire is a high-performance connection standard for personal computers and consumer electronics. Originally developed for Apple computers, this connection has been implemented by x86 computers for some time now. FireWire can move large amounts of data between computers and peripheral devices at transfer rates of up to 400 Mb/s (50 MB/s). A new FireWire specification, FireWire 800 (or FireWire B) has entered the computer market with transfer rates of up to 800 Mb/s (100MB/s).

What are the benefits of FireWire?

  • FireWire is “hot swappable,” eliminating the need to reboot or restart your computer when attaching a device.
  • There is no need for terminators, memory addresses of ID numbers with FireWire devices.
  • The FireWire market is growing at a tremendous rate and device types previously supported only by USB are now supported by FireWire. Most devices include Imaging and external storage devices.
  • Though USB 2.0 is rated at a higher throughput speed (480Mb/s related to FireWire’s 400Mb/s), FireWire delivers faster performance for sustained transfer rates on external hard drives. This is because FireWire has lower overhead (less instructions that the CPU has to interpret related to USB 2.0).

Which connection type is better? USB 2.0 or FireWire?

  • If you plan on transferring large amounts of data often, then FireWire would be the best connection type for you. Most Audio/Video programs recommend FireWire over USB 2.0 devices.
  • If you want the versatility of connecting the hard drive to many different computer systems quickly and easily, and transfer rates are not that important, then USB 2.0 would be the preferred connection type.
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2 Ways To Backup Your Laptop Data

Backup Laptop Data Creating a backup of any Windows Vista computer, including a laptop, is a safety measure in case the hard drive fails. Backups can be accomplished using several options, but the most convenient way to save data is either on a network drive or by burning the files to a CD-ROM or DVD disk. These two methods create full backups that are easily retrieved after a hard drive failure.

Backup laptop data to a Network Drive

  • Right-click the “My Computer” on the desktop and select “Map Network Drive.” Select the drive letter in the drop-down box labeled “Drive.” In the text box labeled “Folder,” click the “Browse” button and select the location of the network computer and folder. Once you’ve entered the information, click the “Finish” button.
  • Double-click the “My Computer” icon on the desktop and you’ll see the newly mapped drive. Double-click this icon and an Explorer window opens. Leave this window open.
  • Double-click the “My Computer” icon again to open a second Explorer window. Navigate to a location of the files you wish to back up. Highlight these files with the mouse and drag and drop them to the opened Explorer window from step 2.
  • Continue copying files to the mapped drive until you’ve copied all the applications and documents. Close both Explorer windows when finished

Backup laptop data to a CD-ROM Disk

  • Insert a blank CD-ROM disk into the drive. Windows automatically opens a new dialog window. Select “Open writable CD directory using Explorer” from the options and click “OK.” You may need several CD-ROMs to backup your hard drive. If you use more than one CD-ROM, these steps need to be repeated.
  • Double-click the “My Computer” icon on the desktop. Navigate to the location of the files you wish to back up to the CD-ROM.
  • Highlight each file and drag and drop them to the opened Explorer window from step 1. Once you have copied all the files, click the “Write to CD” button.
  • Wait a few minutes while the CD-ROM burner copies the files to the CD-ROM. This may take several minutes. You know when the process is complete when the CD-ROM drive door opens. Remove the CD-ROM backup and store it in a safe place.
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Tips For Choosing Hard Drive Backup Software

Hard Drive Backup Software Hard drives fail. Operating systems crash. And then there are all those spammers and hackers. As a computer user, you need backup software. Backup software is a kind of insurance policy for your important data. If you back up your files on a regular basis, you won’t have to worry about losing all of your hard work and precious data if your hard drive fails.

Data backup is more critical than ever before, especially for small businesses where data losses can damage the bottom line. The best backup software is both reliable and customizable, allowing you to customize and automate the data backup process.

Before You Buy Hard Drive Backup Software

1. Match the Software
Different users (home user, home office, small business, large business) have different needs. Backup software that’s a perfect fit for one user may be totally wrong for another. If it’s too difficult to use, you’ll find too many reasons not to use it.

Businesses may need to back up data from multiple operating systems, and from users and computers that are spread across a number of locations. Home and home office users usually only have one or a few computers to worry about, so they can choose backup software that has a fairly straightforward set of features.

2. Try It Before You Buy It
Many software developers offer trial versions of their software. In many cases, these are fully-functioning versions of the software that stop working after a specified period of time, usually 15 to 30 days.

When you find a program that sounds interesting, download the demo and put it through its paces. You should be able to install the program easily, create a simple backup, and restore from the backup, without spending a lot of time reading manuals or help files. Don’t overlook the manual or help files, though; they explain important features, such as backup types, schedules, compression, and restoration.

3. Backup Media
The three most popular types of backup media for home and home office users are hard drives, optical media (such as CDs or DVDs), and online file storage services. Hard drives have fallen so much in price in recent years that they have become both the easiest and the most economical method of storage.

Online file storage is an attractive option, because you can access your files from anywhere. But it can take a long time to back up data to or restore data from a remote location, and most services charge a monthly fee. In addition, you never know whether the service might suddenly go out of business.

4. Backup Types: Full and Incremental
The first time you back up your data you perform a full backup. Full backups can take a long time to perform, because of the amount of data being backed up.

Incremental backups only back up the data that is new or has changed since the last time you performed a backup of the same data. Incremental backups are faster to perform, but can be slower when it comes time to restore files, because you may need to restore the full backup and all subsequent incremental backups, before you get to the data you need. For this reason, it’s a good idea to perform a new, full backup once a week, and incremental backups daily.

5. Backup Types: Archival
An archival backup is different than a normal backup, because the data is permanent and doesn’t change. An archive is a snapshot of data at a specific moment in time. Optical media (CDs and DVDs) are the most popular media for archival backups, because they’re inexpensive, easy to use, and easy to catalog and store.

Home office users use optical media to store monthly or yearly backups of their business data, for easy retrieval at tax time. Home users might store family photos or other important files on optical media.

You can use backup software to archive data or archive the data manually, as needed.

6. Shopping Tips
If you plan to use backup software with optical media, make sure the software can handle it on its own. Some software requires other software to burn the data to a CD or DVD; this is fine if you already have that other software.

Most backup software can compress data while it writes to the backup media. This helps reduce the size of the backup, so it takes up less space. It’s best if the software uses a standard compression format (or no compression at all, if you don’t need it). If it uses a proprietary compression scheme, you may need to reinstall your OS and the backup software before you can restore your data.

Top Hard Drive Backup Software

  • 2BrightSparks SyncBackSE Backup Software
  • EMC Dantz Retrospect Professional Backup Software
  • Norton Ghost Backup Software
  • Acronis True Image Backup Software
  • BounceBack Professional Backup Software

These are selection of top backup softwares for small business users that meets the criteria and will give you the data backup protection you need.

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Computer Data Storage Types And Data Storage Devices

Computer Data Storage Types And Data Storage Devices With the increasing use of technology, usage of digital data has increased to no limits. In order to store this enormous amount of data, we need more powerful and secured data storage devices. Development teams all over the world are working around the clock to make better devices which would be small and inexpensive, but at the same time having more capacity and security.

These are the types of data storage used in computers. Advancing technologies these days are increasing the access rate and the capacity of these data storage devices.

Computer Data Storage Types

1. Data Storage Types – Primary Storage
Basically, primary storage is the memory part of the computer itself. Primary storage includes the Random Access Memory (RAM) and Read Only Memory (ROM).

2. Data Storage Types-Secondary Storage
Hard disks, magnetic tapes and all other data storage devices are included in the secondary storage. They are external to the processor and are used to increase the storage capacity of the computer. The secondary storage is non-volatile and can retain information even after the computer is switched off.

3. Data Storage Types – Tertiary Storage
Tertiary data storage is the third data storage out of the three types of data storage. The tertiary devices includes the storage devices that are connected to the computer in the form of removable mass storage devices. Tertiary storage is often used to store those files that are rarely accessed by the computer user.

Computer Data Storage Devices

Computer data storage devices refers to computer components which can retain the data in digital format, to be used for computing at some point of time in the future.

Disk Storage
Disk storage is a category of computer storage devices, wherein the data is recorded on a round and rotating surface, two-dimensional in nature. Disk drivers are used to record or retrieve information from these disks. Though these days, the term disk storage is mostly used to refer to a hard disk, it also refers to floppy disks and optical disks.

Floppy Disk
A floppy disk is a thin flexible medium of magnetic storage which is encased in a square plastic shell. A floppy disk is read and written by a floppy disk drive. This small storage device was invented by IBM in 1969. It comes in three sizes – 8-inch, 5¼-inch and 3½-inch. Floppy disks enjoyed wide popularity from the 70s to the 90s, but post 90s they were overshadowed by devices which had more capacity and were faster. The use of floppies has almost ceased, though limited use can be still seen in some places.

Compact Disk
Compact disk, more commonly referred to as a CD, is an optical disk used to store digital data. After its introduction in the market in 1982, this technology was followed with the launch of CD-ROM, CD-R, CD-RW, VCD, SVCD and Enhanced CD. CD-ROM and CD-R are widely used in the field of computers. A standard CD having a diameter of 120 mm can hold up to 700 MB data. An estimated 200 billion CDs were sold all over the world by the year 2007.

Digital Versatile Disk
Digital versatile disk, more commonly referred to as DVD, is an optical storage device used for data storage in computer technology. Although they share the same dimensions as the CDs, DVDs have the capacity to store six times more data than the compact disks. DVD-video is used to store video content while DVD-audio is used to store audio content. The original DVD is more often referred to as Standard Definition DVD (SD-DVD). High-definition DVDs were discontinued after the Blu-ray optical disk was introduced into the market.

Blu-Ray Disks
Blu-ray disks, also referred to as BD, are optical disks manufactured by Sony for the storage of digital data. Its is most commonly used in gaming, high definition video storing, etc. Though it is of the same size as a CD or DVD, it can store up to 50 GB data. This technology uses a blue-violet laser to read the data, and hence is referred to as blu-ray disk. These optical disks have overshadowed other optical storage devices due to their high storage capacity.

Hard Disk Drive
A hard disk drive is a non-volatile storage device used to store digitally encoded data on rotating platters having magnetic surfaces. Being non-volatile means it can retain the data stored on it even when it is not powered. Hard disk drives were invented by an IBM team, led by Rey Johnson on 14th December, 1954. Earlier, hard disk drives were a removable form of data storage, but today it has become a sealed unit with fixed media. The first hard disk had a capacity to store 5 MB data on fifty 24 inch platters. Today, the capacity has risen to more than a 100 gigabytes, and is still increasing by the day.

Flash Memory
Flash memory is a non-volatile memory in computer technology which can be electrically programmed or erased. Flash memory devices commonly used today include USB flash drives and memory cards.

USB Flash Drive
USB flash drive is a type of memory storage device that consists of NAND-type flash memory, integrated with Universal Serial Bus (USB) interface. The USB flash drives are removable as well as rewritable. Although they are smaller than a floppy disk, their storage capacity ranges from 64 MB to 128 GB. Some USB drives allow as many as 1 million erases and write cycles, while some have a 10 year data retention capacity.

Memory Cards
Flash memory cards are solid electronic flash memory devices used to store data in digital format. These cards are often used in hand-held as well as mobile computers. They are rewritable and non-volatile in nature. Though small, they have a high capacity and can store data of around 8 GB or more.

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