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Intermittent down drive issues

Colin_Yip
Level 3

‎12-16-2005 06:47 AM

Our environment is on NBU 4.5 with 20+ SAN media servers (Solaris) sharing 8 LTO2 drives via SSO.

Certain SAN media servers regularly experience drives going up and down repeatedly. Examining the server messages file shows that there is a Reservation Conflict repeatedly being hit and then cleared.

Anybody have a similar experience or advice on how to go about resolving this?
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3 REPLIES 3

IP_Freely
Level 4

‎12-16-2005 07:55 AM

I had this problem in the Windows world. Simple change to the registry fixes the problem. Basically I removed the OS's query to the tape device for Test Unit Ready. If I was able to mount the device from the OS level then it's ready. I let NBU arbitrate what host get's it when. I assume there is a way to do the same in Solaris.
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Italo_Calvano_J
Level 4

‎12-18-2005 06:54 AM

I have same problem on a customes. I removed all drives and use wizar to add all drives. The problem was resolved.
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Colin_Yip
Level 3

‎12-20-2005 03:45 AM

Interesting, so it was also the exact symptom? Did you manage to find out the root cause of the problem?

Removing all drives and then adding back sounds risky though i have done it once before.
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