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Disk Maintenance
v Disk to Disk Copy
v Display/Alter Sector
Disk to Disk Copy
Notes:
1. This service aid cannot be used to update to a different size drive. The service aid
only supports copying from a SCSI drive to another SCSI drive of similar size.
2. Use the migratepv command when copying the contents to other disk drive types.
This command also works when copying SCSI disk drives or when copying to a
different size SCSI disk drive. Refer to System Management Guide: Operating
System and Devices for a procedure on migrating the contents of a physical
volume.
This selection allows you to recover data from an old drive when replacing it with a new
drive. 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 use
and the drive be installed in an empty location. If there are no empty locations, then
one of the other drives must 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.
Display/Alter Sector
This selection allows the user to display and alter information on a disk sector. Care
must be used when using this service aid because inappropriate modification to some
disk sectors may result in total loss of all data on the disk. Sectors are addressed by
their decimal sector number. Data is displayed both in hex and in ASCII. To prevent
corrupted data from being incorrectly corrected, the service aid does not display
information that cannot be read correctly.
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S80 and S85 User's Guide
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