2024-12-23

scsi controller

SCSI controller card troubleshooting with Apple Macintosh

DATARECOVERYUNION.COM03 mins

SCSI Controller Card I just installed a new hard drive, but now get intermittent lock ups on boot, error messages that I cannot read from the hard drive, or errors that show problems with the hard drive or file system. What should I explore first?

Note: This document applies to Mac OS 8.6 thru 9.x.

Some operating systems do not support all default SCSI drive features. If you are using a generic (not MAC branded) hard drive, the drive may behave erratically as it may not be optimized for the operating system. If you are seeing these symptoms, find out if SCSI Mode Page editing is supported by the SCSI controller. Disable Initiate Synchronous Negotiation and Disconnect/Reconnect if available at the SCSI controller. Also Unit Attention. Run the Media Verify option from the SCSI controller utilities, to verify data integrity on the hard drive.

These features may not be available at all SCSI controllers. Third party software may be needed to set the hard drive SCSI Mode pages for these features. You will need a SCSI Mode Page Editor tool. See your system manufacturer for SCSI tools.

Isolate the suspect drive to the only device on the controller and retest. Replace the data cable, devices, or external terminators. Verify that both ends of the SCSI bus are terminated. If the hard drive has an option for Termination Power–use it. Or confirm that the SCSI controller supports/supplies bus Termination Power. This is especially important with long cable runs or when using more than one SCSI device.

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Can I boot my computer from SCSI drive?

DATARECOVERYUNION.COM01 mins

SCSI Drive Will my new SCSI drive boot my computer? or error message:

no ROM BIOS?

The drive will need to be partitioned and formatted for your computer’s operating system before it can be used as the boot drive. Follow the instructions in the operating system or computer manual for installing a new hard drive and loading the operating system.

SCSI boots from BIOS. Most SCSI controllers feature on-board ROM BIOS to controll the disk drive. Older SCSI controllers may use jumpers or a start up disk to access BIOS. Enable SCSI BIOS for the active partition, C:\, to be recognized. Using more than one SCSI controller? Choose only one to start up. Typically only one active partition is allowed each drive. If BIOS has support for removable disks as hard drives, choose:All Disks. Consult your SCSI controller or system guides.

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Should I update the BIOS on my SCSI controller?

DATARECOVERYUNION.COM01 mins

SCSI Controller If you are not having any problems with your system, it is not necessary to update the BIOS for your SCSI controller or host adapter.

We recommend that you always contact the manufacturer of your SCSI controller for any available BIOS updates. SCSI controllers (and drives) reach development end-of-life. New updates may not be available. Some SCSI controllers require OEM specific versions to work with the specific chipset on the controller. This is especially true if your SCSI controller or host adapter was installed by an OEM manufacturer (such as Compaq, HP and Dell). BIOS utilities are typically updated with a manufacturer provided utility.

Before you proceed, identify your specific make, model of SCSI controller, the current BIOS revision numbers, and part number (typically printed on BIOS chip).

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