Q: XSAN MDC mirror -drive failure

Hi,

I had one of the MDC mirrored drives fail on my Promise VTRAK. While the mirror was rebuilding the Xsan went nuts failing over from one MDC to the other.

I finally dismounted the volume and stopped the Xsan until the rebuild completed.... afterwards I ran into some corrupted files. I then ran the cvfsk following Apple instructions below.

Now my Atempo backup software is flaging IO disk read errors on about 1000 files. I spot checked the files and they appear to be OK... open and play just fine.

I was wondering has anyone else had these problems when one of the mirrored drives on an XSan fails and rebuilds to a new drive?  Is there a proceedure I need to follow when this happens?

I would be grateful for any input.

Thanks,

Ray

For Xsan 1.3 or later

1. Use Xsan Admin to unmount the volume from the Metadata Controllers and from the Xsan client units.
2. In Xsan Admin, stop the Xsan volume.
3. On a Metadata Controller, open Terminal.
4. Execute the following commands one at a time, and authenticate when prompted:
   
   sudo cvfsck -wv
   When cvfsck exits, it will report that the filesystem was modified.
5. Run the following command to ensure that the repair process was complete:
   
   sudo cvfsck -nv<Volume_Name>
   
   At this point, if cvfsck reports that the filesystem was modified or would have been modified, you should contact Apple technical support.