tdubb123
3 Silver

lost access to volume, successfully restored access to volume

I am getting a lot of messages about losing access to volumeand then restored access to volumes. and idea?

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hanacd
2 Bronze

Re: lost access to volume, successfully restored access to volume

Hello tdubb,

just discovered your post and seen that nobody provided feedback here. I suppose you might have discovered the root cause. For that what you shared it's difficult to really advice. Things I would look at:

  • "Flipping" HBA as the SP "owner" in a VNX system (if it's a VNX) is trying to fail back, as well known as "trespassing"
  • HBA, fibre or anything else having physicalla a connectivity issue
  • firmware / driver version compatibility issue
  • wrong path policy

And of course, if you haven't done, so - contact EMC support at http://support.emc.com

Let us know if and how you resolved the issue.

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hanacd
2 Bronze

Re: lost access to volume, successfully restored access to volume

And discovered that there is a similar post some time ago, suggesting similar points as I did just with some more specifics where to look at for it https://community.emc.com/message/793297?et=watches.email.thread#793297

  • These are datastore timeouts, where the datastore heartbeat has not responded withing the timeout period.
    Are you seeing any PowerPath or NMP messages relating to path failures in the vmkernel.log?
  • Any SCSI errors in the vmkernel.log?
  • Any device latency warnings?
  • Other performance issues being reported from the VNX?

Care to post up any errors from that log (with customer's permission)

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r0ck1
1 Copper

Re: lost access to volume, successfully restored access to volume

Try to check the fiber ports mapping on your "server's" SAN HBA, in some cases administrators forget to fix the port mapping probably and the connections might get lost if the connection fails over on a disconnected port.

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