Disk To Disk Copy Service Aid; Display/Alter Sector Service Aid; Format And Certify - IBM R/S6000 7012 300 Series Operator's Manual

Spare Sector Availability
This task consists of Initialize, Format and Certify, and Spare Sector Availability functions
for optical disks.
Initialize
This service aid is used to format the optical disk without certifying it. This option does
not reassign the defective sectors; however, it is a quick way of formatting after cleaning
the disk.

Format and Certify

This service aid is used to format the optical disk and certify it. The certification process
is drive specific and performs the surface analysis of all user data and spare sectors. The
defective sectors are reassigned.
Spare Sectors Availability
This service aid checks the number of spare sectors available on the optical disk. The
spare sectors are used to reassign when defective sectors are encountered during
normal usage or during a format and certify operation. Low availability of spare sectors
indicates that the disk needs to be backed up and replaced. Formatting the disk will not
improve the availability of spare sectors.
This task may be run directly from the AIX command line. The following usage statement
describes the syntax of the command:
diag –c –d <deviceName> –T "{format [–s {initialize | fmtcert }]
| chkspares}"
Disk Maintenance
This service aid consist of the following:

Disk to Disk Copy Service Aid

Display/Alter Sector Service Aid

Disk to Disk Copy Service Aid
Note: To access this service aid refer to the Disk Maintenance Service Aid.
The selection allows you to recover data from an old drive when replacing it with a new
drive. The service aid only supports copying from a drive to another drive of similar size.
This service aid cannot be used to update to a different size drive. The migratepv
command should be used when updating drives. The service aid will recover all LVM
software reassigned blocks. To prevent corrupted data from being copied to the new drive,
the service aid will abort if an unrecoverable read error is detected. To help prevent possible
problems with the new drive, the service aid will abort if the number of bad blocks being
reassigned reaches a threshold.
The procedure for using this service aid requires that both the old and new disks be installed
in or attached to the system with unique SCSI addresses. This requires that the new disk
drive SCSI address must be set to an address that is not currently in used and the drive be
installed in an empty location. If there are no empty locations, then one of the other drives
will have to be removed. Once the copy is complete, only one drive may remain installed.
Either remove the target drive to return to the original configuration, or perform the following
procedure to complete the replacement of the old drive with the new drive.
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Operator Guide