IBM xSeries 260, User Manual

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Backup and Restore Media
This service aid allows verification of backup media and devices. It presents a menu
of tape and diskette devices available for testing and prompts for selection of the
desired device. It then presents a menu of available backup formats and prompts for
selection of the desired format. The supported formats are tar, backup, and cpio.
After the device and format are selected, the service aid backups a known file to the
selected device, restores that file to /tmp, and compares the original file to the
restored file. The restored file is also left in /tmp to allow for visual comparison. All
errors are reported.
Certify Media
This task allows the selection of diskette or hardfiles to be certified.
Hardfiles can be connected either to a SCSI adapter (non-RAID) or a PCI SCSI
RAID adapter. The usage and criteria for a hardfile connected to a non-RAID SCSI
adapter are different from those for a hardfile connected to a PCI SCSI RAID
adapter.
Ÿ
Certify Diskette
This selection provides a way to verify the data written on a diskette. When this
service aid is selected, a menu asks you to select the type of diskette being
verified. The program then reads all of the ID and data fields on the diskette one
time and displays the total number of bad sectors found.
Ÿ
Certify Hardfile Attached to a Non-RAID SCSI Adapter
This selection reads all of the ID and data fields. It checks for bad data and
counts all errors encountered. If the unrecovered data errors exceed the
threshold value, the hardfile needs to be formatted and certified. If the recovered
data errors, recovered and unrecovered equipment errors exceed the threshold
values, the disk needs to be replaced.
This task may be run directly from the AIX command line. The following usage
statement describes the syntax of the command:
Usage:
diag -c -d <deviceName> -T "certify"
Chapter 6. Introduction to Diagnostic Tasks and Service Aids
6-5