Thanks Ed,

I forgot RAID5e was a proprietary thing...

Your suggestion has been noted... I'll see what the mgmt have to say.... I don't like 
my chances though.

Judging by the response to this thread - It seems that others have had this problem on 
hardware other than that from the suppliers name that starts with 'I'. Makes you 
wonder what the point of having RAID is if it's not going to do its job under normal 
load and occasionally bad circumstances hmmm...

FTR - after deleting, re-creating the array and running a complete restore, we were 
completely back online within 10 hours (over-nighter). 

Interesting to see if and when it happens again....
MP

-----Original Message-----
From: Ed Crowley [mailto:[EMAIL PROTECTED]]
Sent: Saturday, 1 June 2002 12:28 AM
To: Exchange Discussions
Subject: RE: kinda OT - RAID on the exchange server


Please share what RAID5e is.  I could only find two hits in AltaVista on
that phrase, and both used character sets not in my workstation.

May I suggest you change hardware vendors?  My employer makes a fine
line of servers that I don't believe have this problem.

Ed Crowley MCSE+Internet MVP kcCC+I
Tech Consultant
hp Services
Protecting the world from PSTs and Bricked Backups!


-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]] On Behalf Of Mark Peoples
Sent: Thursday, May 30, 2002 11:57 PM
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



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