Jonathan Kaplan
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Add mirror fails windows 2003
I have a server running Windows 2003 with two sets of raid 1 disks. One set has the OS on it and seems fine. The second has lots of data and programs on it, including websites. I recently noticed that one of the drives in the second mirror had been displaying bad clusters. I replaced it with another new one. But now, when I try to add mirror to the good drive, it fails with a message in event log describing bad clusters. I run the chkdsk e: /f and it runs and fixes a different problem each time. So I try adding a volume and again it fails. Is there anything to do about this, or should I just back up the older drive and recreate the raid completely from the backup?
Are building mirror of e drive? If yes then run chkdsk e:/r on it. /f command does not fix bad sectors.
The "fixes a different problem each time" suggests there's more to it than just a bad sector.
consider a possibility that,
1. some other part of the server is faulty (RAM; controller; controllers' RAM, if any)
2. wrong drive was replaced
starting actions might be
1. do a RAM test on the server
2. check to see if there are other drives in a server indicating a problem, review the Event Log.
3. do a non-destructive test on the drive removed from the server to check if the drive is indeed bad
4. do a CHKDSK /F /R on the drive currently in the server
consider a possibility that,
1. some other part of the server is faulty (RAM; controller; controllers' RAM, if any)
2. wrong drive was replaced
starting actions might be
1. do a RAM test on the server
2. check to see if there are other drives in a server indicating a problem, review the Event Log.
3. do a non-destructive test on the drive removed from the server to check if the drive is indeed bad
4. do a CHKDSK /F /R on the drive currently in the server
ASKER
I tried the chkdsk e: /r and it worked OK, but then when I try to regenerate the mirror, LDM keeps failing with the following message Event ID 29:
dmio: Harddisk3 read error at block 418959: status 0xc000009c
At least it's now consistent. Is this disk toast and why would both old drive exhibit the same issues? I though the idea behind a mirror was to avoid this?
dmio: Harddisk3 read error at block 418959: status 0xc000009c
At least it's now consistent. Is this disk toast and why would both old drive exhibit the same issues? I though the idea behind a mirror was to avoid this?
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ASKER
I finally replac ed the disk in the mirror set only to have the second one fail after the re-syncing I'm going to replace that one too. Thank goodness they didn't fail at the same time!
more info here