Re: Advice on RAID crash

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The disks are Atlas 10K2/15K models and are getting up there (5+ years for
some) but I've had disk errors with this controller (which is also 5+ years
old) before and they always show up in the logs. That is what has got me
confused as I've never had an issue with Adaptec controllers - they are
always bulletproof. Was yours an Adaptec controller as well?

I think I have a single channel; RAID card about - I think I will setup a
test system to test the drives as I swap them out. What did you use to test
the drives?

You may be right about looking into a new controller and drive setup. What
would you reco: SAS, SATA or stick with U320?

Thx

--
Allan Williams



"Philip E." <groups@xxxxxxxxxxxxxxxx> wrote in message
news:udGeIKlUIHA.5816@xxxxxxxxxxxxxxxxxxxxxxx
How old are the drives and the RAID controller?

Suggestion: Budget for a new box, or at least a new RAID setup.

We had Event ID 15s on a 6 drive RAID 5 array that turned out to be some
bad sectors on one of the drives in the array that the controller and the
OS did not pickup on. We ended up figuring that out after we replaced the
controller and drives and could test each drive individually.

But, we needed to go through some pain to get things back first.

Run chkdsk /f /r on the array. Note that it can take a huge chunk of time
to complete.

If it is indeed bad sectors on one of the array members, the problem may
not show itself for a while again. Part of the problem is that a chkdsk /f
/r on the dismounted partition still may not fix things completely as the
bad sector problem can keep growing beyond the bad areas marked by the OS
after the chkdks is run.
--

Philip E.
MPECS Inc.
Microsoft Small Business Specialists
http://blog.mpecsinc.ca
"Al Williams" <donotreplydirect@xxxxxxxxxxxxxxxx> wrote in message
news:eQeaBqkUIHA.4696@xxxxxxxxxxxxxxxxxxxxxxx
SBS2003 Premium SP2

Recently our Adaptec 2100 SCSI U160 RAID5 array went down and caused a
bunch of errors like this in the system log:

Event Type: Error
Event Source: dpti2o
Event Category: None
Event ID: 15
Date: 08-01-07
Time: 8:18:55 AM
User: N/A
Computer: HISERVER
Description:
The device, \Device\Scsi\dpti2o1, is not ready for access yet.
----------------------
Event Type: Error
Event Source: Disk
Event Category: None
Event ID: 11
Date: 08-01-07
Time: 8:18:55 AM
User: N/A
Computer: HISERVER
Description:
The driver detected a controller error on \Device\Harddisk0.

This RAID array contains some data and the exchange and SQL databases.
Other drives are on another separate RAID mirror, so the server continued
to run as best it could but needed several reboots to get going Monday
morning (lots of SQL and exchange errors in the logs due to the drive
going offline). After rebooting a few times the server has been fine
ever since (did a full backup as well).

The strange thing is I checked the Adaptec Storage Manager logs and it
shows no errors. As far as it is concerned the RAID array is fine - none
of the disks show any faults and the array did not degrade.

No changes have been made recently to the server except for a couple of
of the usual monthly winupdates. I leaning towards this being a hardware
problem as the server locked up tight a few times while attempting to
recover from the issue Monday (gave a STOP 100000ea as well). Could the
RAID card itself be having issues?

Any ideas on how I can determine what caused the RAID to go offline?

Thanks,

--
Allan Williams







.

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