Case:Customers are a program developer with good data security and backup data awareness. Through the phone, the hard disk learned that the hard disk is a western -digit hard disk, which is mainly used as a backup disk to use it for many years.During the copy of the data, it was found that the replication…
File Name: Quick Recovery for RAID
Version: RAID-0 Version/RAID-5 Version
Publisher: Unistal Systems
Raid Supported: RAID 0, RAID 5
Analyze Mode: Manual Analyze
Price: $674.00/$994
What can Quick Recovery for RAID?
Quick Recovery RAID is a do-it-yourself non-destructive raid data recovery software. There are just two steps to perform the complete operation. Analysis, Select & Save. Analysis is the most important aspect of data recovery.
Download:
Raid 0 Demo: http://www.unistal.com/download-form.html?id=10
Raid 5 Demo: http://www.unistal.com/download-form.html?id=10
Buy:
http://www.unistal.com/raid-data-recovery.html#buy-online
HDD Printed circuit board (PCB) with board number BF41-00180A is usually used on these Samsung hard disk drives: HD250HJ, HD250HJ/C, FW FH100-05, TRIDENT3, Samsung 250GB SATA 3.5 Hard Drive; HD250HJ, HD250HJ/C, FW FH100-05, Samsung 250GB SATA 3.5 Hard Drive; HD250HJ, HD250HJ, FW FH100-06, TRIDENT3, Samsung 250GB SATA 3.5 Hard Drive The BF41-00180A Samsung PCB repair…
Case:Server RAID0 fault data recovery-Customer description The server does RAID0, of which 5 is offline, and the other disks are green lights and the system collapses. Solution:Customers send 6 hard disks to detect the No. 5 disk of the fault priority. The hard disk does not pass power to determine the circuit board failure.Then test…
S.M.A.R.T.
Self-monitoring, analysis, and reporting technology. A technology to assist users in preventing system down time due to hard drive failure; it attempts to predict hard drive failure before it occurs.
Safe Shutdown™
A WD-exclusive feature that ensures all data is transferred before shutting down the drive.
SAS
Serial Attached SCSI. A point-to-point serial interface that links controllers directly to hard drives. Unlike traditional parallel SCSI, SAS allows up to 128 devices of different sizes and types to be connected simultaneously with longer, thinner cables. SAS drives can also be hot-plugged.
SATA
Serial advanced technology attachment. A standard for connecting hard drives to computer systems, based on serial signaling technology. Its practical advantages over PATA (also known as EIDE) are longer and thinner cables for more efficient airflow within a form factor, fewer pin conductors for reduced electromagnetic interference, and lower signal voltage to minimize noise margin.
SCA-2
(Single Connector Attach) interface incorporates a grounding contact, blindmate connector, direct plug misalignment tolerance, The number of errors of a given type that occur when reading a specified number of bits. Protection, hot swap capability, and backplane connector options for SCSI devices. SCA-2 is commonly called the 80-pin SCSI connector.
SCAM
SCSI configure automatically. Allows users to attach SCSI devices without worrying about configuration options.
SCSI
Small computer system interface. An interface between a computer and peripheral controllers, commonly used in enterprise computing and Macintosh systems. Pronounced scuzzy.
SCSI device
A host computer adapter, peripheral controller, or intelligent peripheral that can be attached to a SCSI bus.
sector
A 512-byte packet of data. This is the smallest amount of data that can be read from or written to a drive from a host interface.
sector slipping
A technique used to push down defective sector sites during a format or reassignment operation to maintain sequential order of the data. Spares are located throughout the disk for this purpose.
SecureConnect™
WD’s SATA cable connection system designed to provide a stable, secure attachment between a hard drive and a cable.
SecurePark™
Parks the recording heads off the disk surface during spin up, spin down and when the drive is off. This ensures the recording head never touches the disk surface resulting in improved long term reliability due to less head wear and improved shock tolerance.
seek
The movement of read/write heads to a specified location. The actuator moves heads to the cylinder containing the track and sector of stored data.
seek time
A measure (in milliseconds) of how fast a hard drive can move its read/write heads to a specific location.
sequential access
The reading or writing of data in a sequential order as opposed to random access. Magnetic tape drives store data in sequential blocks.
server
A computer used primarily to store data, providing access to shared resources. Usually contains a network operating system.
servo burst
Provides positioning information to the actuator arm, found at equal intervals on each disk surface (embedded servo) or on an entire surface (dedicated servo).
share
A folder that can be used to organize and store files on a network storage system. Shares can be shared with everyone (public) or with selected users on your network (private).
Shock Guard™
WD technology to protect the drive mechanics and delicate platter surface from shocks, both when it’s in use and when it’s not.
ShockShield™
WD packaging that provides double protection from rough handling and static damage. A protective wrapping that consists of a static protection envelope securely packed inside a plastic case.
SilkStream™
WD AV feature that provides for smooth, continuous digital video playback of multiple simultaneous hard drive streams.
single-ended SCSI
The standard electrical interface for SCSI. Single-ended means an interface with one signal and one corresponding ground line for each SCSI signal. Used primarily in applications requiring cable lengths under 19 feet (6 meters).
Slave
The secondary drive in a dual-drive configuration.
SmartPower™
Intelligent drive management system that automatically powers a device on and off with the computer.
SMB
Server Message Block. File-sharing protocol for Windows platform that allows users to access shares through My Network Places. Mac OS X or later also supports the SMB protocol.
SMTP
Simple Mail Transfer Protocol. Standard for transferring e-mail across the Internet.
soft error
An error that is not repeated when the same location is re-read.
soft reset
ATA reset type in which the drive resets the interface circuitry according to the Set Features command requirement.
soft sectored
A technique that allows a controller to determine the beginning of a sector by reading format information from a disk.
SoftSeek™
A WD algorithm used with WhisperDrive™ technology to deliver the quietest 2.5-inch hard drive on the market.
sound power
A value measured using 8-12 microphones which represents the sound level emitted from the entire hemispherical area surrounding the drive. Because sound power more closely corresponds to the sound level detected by the human ear, it is used as the industry standard for measuring hard drive acoustics.
sound pressure
A value representing the sound level emitted by a hard drive from a single point. Only one microphone is used to measure sound pressure.
spanned
Combination of drives in a linear fashion to create one large logical volume. A spanned drive is like a single, bigger drive, in that files written to the volume earlier go at the "beginning" of the volume, on the first physical drive. If one of the drives fails, all data is lost.
SPC
SCSI Primary Commands.
spindle
The center, rod-like axle on which disks are mounted.
spindle motor
A motor that rotates a spindle and ultimately the disks.
spindle speed
See RPM.
spindle synchronization
In multiple-drive systems, a feature that causes SCSI hard drives to rotate to the same address location at the same time.
SSA
SSC
Spread Spectrum Clocking. Feature that controls electromagnetic interference output in hard drives.
SSH
Secure Shell. A network protocol that uses encryption and authentication keys to enable two devices on the network to exchange data securely.
SSL
Secure Socket Layer. A protocol that provides authentication and encryption services between a web server and a web browser.
StableTrac™
The motor shaft of the hard drive is secured at both ends to reduce system-induced vibration and stabilize platters for accurate tracking during read and write operations.
storage capacity
The amount of data that can be stored on a hard drive.
streaming media
Media such as audio, video, and photos that are constantly received while being delivered by a streaming provider.
striping
The spread of data over multiple hard drives to improve performance. See also RAID 0.
structure-borne acoustics
When mounted in a digital device, the hard drive generates additional noise as a result of vibration. This type of noise, caused by the hard drive’s proximity to other system components, is referred to as structure-borne acoustics.
subsystem
A secondary or component part of a system, as a hard drive is a subsystem of a personal computer.
surface
The top or the bottom side of a platter coated with a magnetic material required to record data. A platter may use one or both surfaces to store data.
synchronous transmission
Transmission in which the sending and receiving devices operate continuously at the same frequency and are held in a desired phase relationship by a correction device.
system files
The files required to run an operating system.
system integrator
An independent professional who specifies and provides the necessary combinations of hardware and software in response to end user needs.
HDD Printed circuit board (PCB) with board number 100788341 is usually used on these Seagate hard disk drives: ST3000DM003, ZM4, TK, PN 2AE16L-568, FW 0001, Seagate 3TB SATA 3.5″ Hard Drive; ST4000VN008, ZDH, TK, PN 2DR166-500, FW SC60, Seagate 4TB SATA 3.5″ Hard Drive; ST4000VX007, ZGY, TK, PN 2DT166-300, FW CV11, Seagate 4TB SATA 3.5″…
The spindle motor, also sometimes called the spindle shaft, is responsible for turning the hard disk platters, allowing the hard drive to operate. The spindle motor is sort of a “work horse” of the hard disk, like a heart of human, it give the motivity of power to the HDD. It’s not flashy, but it must provide stable, reliable and consistent turning power for thousands of hours of often continuous use to allow the hard disk to function properly. In fact, many drive failures are actually failures with the spindle motor, not the data storage systems, such as that the motor bearing seizure, Motor not spin.
The spindle motor has several important commitments placed upon it. First, the motor must be of high quality, so it can run for thousands of hours, and tolerate thousands of start and stop cycles, without failing. Second, it must be run smoothly and with a minimum of vibration, due to the strict tolerances of the platters and heads inside the drive. Third, it must not generate excessive amounts of heat or noise. Fourth, it should not draw too much power. And finally, it must have its speed managed so that it turns at the proper speed, neither faster nor slower.
I’ve found that the weather is one of the factors which effect the lifetime of HDD. From some customers from Africa, there are more haunted by the Motor stuck problems than any other places. For some HDD used on server have more demands on the tolerance and quality, they are supposed to be work at 7X24 a week.
To meet these demands, all PC hard disks use servo-controlled DC spindle motors. A servo system is a closed-loop feedback system; this is the exact same technology as is used in modern voice coil actuators. Let’s see how servo systems work in detail. In the case of the spindle motor, the feedback for the closed-loop system comes in the form of a speed sensor. This provides the feedback information to the motor that allows it to spin at exactly the right speed.
All hard disk spindle motors are configured for direct connection; there are no belts or gears that are used to connect them to the hard disk platter spindle. The spindle onto which the platters are mounted is attached directly to the shaft of the motor. The platters are machined with a hole at the exact size of the spindle, and are placed onto the spindle with separator rings (spacers) between them to maintain the correct distance and provide room for the head arms. The entire assembly is secured with a head cap and usually, lots of small Torx screws.
! By design, TORX head screws resist cam-out better than Phillips head or slot head screws. Where Phillips heads were designed to cause the driver to cam out, to prevent over-tightening, TORX heads were designed to prevent it. The reason for this was the development of better torque-limiting automatic screwdrivers for use in factories. Rather than relying on the tool slipping out of the screw head when a torque level is reached, and thereby risking damage to the driver tip, screw head and workpiece, the drivers were designed to achieve a desired torque consistently. Camcar LLC claims this can increase tool bit life by ten times or more.
One important quality issue that has become a focus of attention with newer hard disks is the amount of noise, heat and vibration they generate. The reason for this becoming more of an issue is the increase in spindle speed in most drives. On older hard disks that typically spun at 3600 RPM, this was much less of a problem. Some newer drives, especially 7200 and 10,000 RPM models can make a lot of noise when they are running. If possible, it’s a good idea to check out a hard disk in operation before you buy it, to assess its noise level and see if it bothers you; this varies greatly from individual to individual. Heat created by the spindle motor can eventually cause damage to the hard disk, which is why newer drives need more attention paid to their cooling. Newer high-speed drives almost always run cooler and quieter than the first generation of drives at any new spindle speed. It can be painful to be a pioneer;
A hard drive can be divided into primary partition and extended partitions. Partitions function as physically separate storage units. This allows you to separate different types of information, such as user data on one partition and applications on another. A hard drive can contain up to four primary partitions, or up to three primary partitions and one extended partition, for a maximum of four partitions.
There can be only one extended partition on a hard disk, so you should include all remaining free space in the extended partition. Unlike primary partitions, you don’t format extended partitions or assign drive letters to them. You divide extended partitions into segments. Each segment is a logical drive. You assign a drive letter to each logical drive and format it with a file system.
Case:The data recovery center has successfully restored Dellpa840 data. The group’s server RAID information is lost. The array has the SQL database of the user in the past year, the system: Win2003 Servers.The Data Recovery Center received a call from the customer for help, saying that one of their (ST) 3.5 -inch SAS*4 server was…
Case:Dell PowerEdge T710 can be equipped with up to 16 hard disks, and the memory capacity can reach up to 144GB, which is the best choice for large capacity operations.The T710 design method that meets customer needs provides excellent system versatility, and adopts neat and reasonable components and power configurations to facilitate fast installation and…
