Returning to Mirroring After Unmasking an Orphan

ID Number: Q70269

2.00

OS/2

Summary:

Currently, there is no way to return to disk mirroring or duplexing

after unmasking an orphaned drive in LAN Manager version 2.00 without

reinstalling OS/2 and LAN Manager.

More Information:

Consider the typical scenario where the partition being mirrored goes

bad. Physical disk 0 has a D partition that is mirrored by a secondary

external hard disk. The D partition on physical disk 0 is then

inflicted by some critical error that cannot be corrected without

repartitioning and reformatting it. Since the D partition has an exact

duplicate on the external drive, the duplicate is unmasked and

replaces the former D partition on the primary drive.

Now, consider that the bad partition on the primary drive has been

repaired and can now be put back into service. Without backing up the

files mirrored by the external hard disk onto another drive, it is

impossible to remirror drive D with the external hard disk, since both

partitions are reformatted during disk mirroring setup.

Backing up the files may not be a problem if the mirrored partition

was not that large; however, if the mirrored partition was, for

example, 150 MB, not only would you need to find a hard disk or tape

drive with 150 MB of free space, you must go through the time

consuming process of reinstalling.