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Disk Maintenance Service Aid
Disk to Disk Copy Service Aid
Display/Alter Sector Service Aid
Disk to Disk Copy Service Aid
The service aid 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
recovers all LVM software reassigned blocks. To prevent corrupted data from being
copied to the new drive, the service aid aborts if an unrecoverable read error is
detected. To help prevent possible problems with the new drive, the service aid
aborts 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 has 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.
1. Remove both drives.
2. Set the SCSI address of the new drive to the SCSI address of the old drive.
3. Install the new drive in the old drive's location.
4. Install any other drives that were removed into their original location.
To prevent problems that may occur when running this service aid from disk, it is
suggested that this service aid be run from the diagnostics that are loaded from
removable media when possible.
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IBM RS/6000 7025 F50 Series User's Guide