IBM 8685 Hardware Maintenance Manual - Page 30
Advanced Configuration Options, SCSI Disk Utilities, Format Disk, Attention
UPC - 087944957171
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Select this choice to configure SCSI device parameters. Before you can make updates, you must know the ID of the device whose parameters you want to configure. Note: The Maximum Sync Transfer Rate represents the transfer rate for Ultra SCSI devices. - The transfer rate for Ultra160 LVD devices is 160.0 MBps. - The transfer rate for Ultra2 SCSI LVD devices is 80.0 MBps. - The transfer rate for Fast SCSI devices is 20.0 MBps. - Advanced Configuration Options Select this choice to view or change the settings for advanced configuration options. v SCSI Disk Utilities Select this choice to view the SCSI IDs that are assigned to each device or to format a SCSI device. To use the utility program, select a drive from the list. Read the screens carefully before making a selection. Note: If you press Ctrl+A before the selected drives are ready, an Unexpected SCSI Command Failure screen might appear. Restart the server and watch the SCSISelect messages as each drive spins up. After the drive that you want to view or format spins up, press Ctrl+A. v Format Disk Attention: The Low-Level Format program erases all data and programs. If this choice appears on the SCSISelect menu, select this choice to perform a low-level format on a hard disk drive. Depending on the hard disk drive capacity, the Low-Level Format program could take up to 2 hours. Use the Low-Level Format program: - When you are installing software that requires a low-level format - When you get recurring messages from the diagnostic tests directing you to run the Low-Level Format program on the hard disk drive - As a last resort before replacing a failing hard disk drive Note: If your server has a PCI RAID adapter installed, see the RAID adapter documentation for instructions for performing low-level formats on hard disk drives attached to the adapter. To start the Low-Level Format program: 1. If the hard disk drive is working, make a backup copy of all the files and programs on the hard disk. (See your operating-system information for instructions.) 2. Select Format Disk; then, follow the instructions on the screen. Note: A hard disk typically contains more tracks than its stated capacity (to allow for defective tracks). A message appears on the screen if the defect limit is reached. If this happens, replace the hard disk drive. 20 xSeries 255 Type 8685: Hardware Maintenance Manual and Troubleshooting Guide