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HP SIM Manual Discovery causes issues
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9/10/2009 12:05:55 PM
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Recently we upgraded to a new version of HP SIM (systems insight manager), of course not testing it or letting the DBA's know. Suddenly some things crash. The new version of HP Sim provides a "richer discovery model"; oh it's rich!
Seems the new version performs some type of scan on the scsi bus, which causes our multi-path software (EMC Powerpath) to loose connectivity to the SAN, this causes the file system to "Panic", and all filesystems unmount. Nice.
SIM is a hardware monitoring solution from HP for HP servers. The server administration team loves it, the SQL DBA's don't mind it. It of course uses SQL Server for a back-end database, so it helps keep us employed as well ! Basically SIM provides hardware inventory and monitoring of the servers.
Specifically:
Version: Systems Insight Manager 5.3 with SP1 - Windows
Build version: C.05.03.01.00
Using the Manual Discovery Task that ships with the product.
The issue was most notable with our clustered servers, especially Polyserve. Below were the error messages:
I/O error in nodelist_get for filesystem on psv30: nlblocknr=10, blocknr=10, nlsize=8192, size=8192, count=16.
umount: unmounting filesystem from psv30.
Filesystem on psv30 has finished disabling itself, and has no more writes to drain.
A psv-bound subdevice (psv7 - 0x8001) has been removed from the system.
Filesystem on psv39 has suffered a critical I/O error, and will be disabled to protect filesystem integrity.
The device, \Device\Harddisk140\DR645, is not ready for access yet.
\Device\MPIODisk398 is currently in a degraded state. One or more paths have failed, though the process is now complete.
Work closely with your administrators and be careful of how these monitoring solutions will affect your production servers.
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