HPE Community
MSA Storage
1753787 Members
7869 Online
108799 Solutions
New Discussion

EVA8400: Momentarily loose all disk paths when adding a new LUN on Linux

 
JW Johnson
New Member

‎05-28-2009 06:58 AM

‎05-28-2009 06:58 AM

EVA8400: Momentarily loose all disk paths when adding a new LUN on Linux

I am hoping someone can help with a EVA8400 problem.

Every time we add a new LUN and assign it to a host, we momentarily loose all paths to all LUNs. The paths are only down for a second or two, but its long enough to cause problems on a busy cluster.

We are running RHEL5.3 64-bit, using the built in multipathing, which seems to work well otherwise. The problem appears to be that when a new LUN is assigned to a host, all LUNs disappear for a moment and then reappear.
0 Kudos
Reply
1 REPLY 1
Patrick Terlisten
Honored Contributor

‎05-29-2009 04:14 AM

‎05-29-2009 04:14 AM

Re: EVA8400: Momentarily loose all disk paths when adding a new LUN on Linux

Hello,

this could be caused by a scsi bus reset. Fibre-Channel is using SCSI as an upper-layer protocol. To use the newly added LUN the kernel does a scsi bus reset. I don't think that you can deactive it. Best way: Add the LUN to the slave node, failover the cluster and add it to the other node.

Best regards,
Patrick
Best regards,
Patrick
0 Kudos
Reply
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.