Windows Server

Robert Antony · Guest

Hi,
I'm running Windows 2003 Enterprise Edition with MSCS as a basic
configuration of 2 nodes (active/passive) and I've found the below in the
cluster.log and I'm concerned that the disk signatures may have changed which
should the resources be failed over or the nodes rebooted may cause problems.

000009cc.0000075c::2005/07/01-07:02:45.547 INFO Physical Disk:
UpdateAvailableDisks: Disk ######### on critical bus or already clustered

there is an entry in the log for each disk resource this server has.

Does any one know what the above means?

Regards
Robert

Mike Rosado [MSFT] · Guest

Hi Robert,

Sorry for the delay in responding. We saw this behavior reported by
another customer where they were attempting to add a previously clustered
disk back into cluster after pulling it out to convert if from RAID-1 to
RAID-5. When they attempted to add it back it, it never appeared as an
available disk yet the AvailableDisks registry key
(HKLM\System\CurrentControlSet\Services\ClusDisk\Parameters\AvailableDisks\)
did show the signature until an attempt was made. At that point, the disk
signature was removed.

The source code for this error indicated that a bus will be disqualified if
it meets any of 3 criteria.
1. If the bus has a disk that hosts the system or boot partition.
2. If the bus has a page file on it.
3. If the bus is a repository for writting DMP file in the event of a
system or memory dump.

We found under the (HKLM\SYSTEM\CurrentControlSet\Control\Session
Manager\Memory Management\PagingFiles) registry key that the S:\ drive was
included and this disqualified all LUNs on this SAN's bus. These drives
included the E: and F: drives which the customer wanted added to the SQL
Group.

Once we removed the S:\ drive as a page file storage location, we were able
to add the drives successfully.

--------------------
Hope this helps,
Mike Rosado
Windows 2000 MCSE + MCDBA
Microsoft Enterprise Platform Support
Windows NT/2000/2003 Cluster Technologies

====================================================
When responding to posts, please "Reply to Group" via your newsreader so
that others may learn and benefit from your issue.
====================================================

This posting is provided "AS IS" with no warranties, and confers no rights.
<http://www.microsoft.com/info/cpyright.htm>

kelso · Joined: 09 Nov 2005 Posts: 4

Microsoft doesn’t have an article for this, but when you add a disk into the cluster or change the disk signature to a disk, it should be added back into the cluster with caution.

You should move your resources to one node, power down the 2nd node, present the LUN to the node and add it as a cluster resource. Bring your 2nd node online and move the cluster resource to the 2nd node.

This will clear the disk from the available disks key.

Microsoft is currently writing a KB Article for this now.

	Windows Server Forum Index -> Clustering	All times are GMT
Page 1 of 1