Mark my 2 cent's is It would seem to me that you have some type of problem with the hardware it self either controller or possibly hard drives, likely the raid controller.
(I had this happen) For example/usually.. if say your had 3 disks in a raid5. One dies/dead gone.... the two are left running (critical mode) so you know which is dead, assume hot swap here, you pull it. You put in new "identical" drive. Now....Depending on how your particular hardware works and the way it was setup. the raid controller will likely (if setup this way) start the rebuild process on the new drive thus in a matter of time the new drive is back in the array, thus you are now back to being fault tolerant. It should be transparent. Now in my case I have setup my raid 5 arrays, to automatically rebuild, AND it my controllers case it can prioritize how quickly it does this, thus determining to "drag" on the system during rebuild. Thus I can pull the old dead drive, put in the new one and it does all the rebuild in the background. How long? depends on lot of things. I had a similar hardware issues once, it ended up being a over heating issues on the drives, dues to poor case design. Moved HD's to better case with proper cooling, has run like charm ever since. 2cents bill -----Original Message----- From: Mark Peoples [mailto:[EMAIL PROTECTED]] Sent: Friday, May 31, 2002 2:57 AM To: Exchange Discussions Subject: kinda OT - RAID on the exchange server I apologise for the OT question... Has anyone experienced issues with bad striping on a RAID5e disk array? (hardware RAID) I have had this twice in the last 6 months. When a disk dies in the array it is replaced ASAP. RAID5e should be able to handle this without error right? When the RAID5e striping has errors, it registers sectors on the logical disk as bad and causes disk I/O errors - which screws (eventually corrupts) the exchange information store(s) on the logical drive and prevents backups from completing. hhhmmm ... perhaps someone can enlighten me as to why RAID5e couldn't handle the occassional defunct drive without screwing the rest of the array in the process of rebuilding itself... The hardware vendor has recommended re-creating the RAID array from scratch and restoring from backup.... Any thoughts? sorry again for the OT question - but I'll even throw in a Friday afternoon Haiku for good measure: Friday afternoon gotta get going home server is cactus Thanks, MP _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
