Server is losing access to storage volumes

[TheVMinator]

I'm periodically having connectivity issues between an ESX host and multiple storage volumes, which are generating these errors:

"Lost access to volume  due to
connectivity issues. Recovery attempt is in
progress and outcome will be reported shortly.
info"

What are most likely causes for this?  How can I prevent this by insuring proper redundancy and failover in the various parts of my storage configuration?

Thanks

[AWo]

Which kind of storage do you use?

FC SAN?

iSCSI?

NFS?

Lokal SCSI?

Please be more descriptive about your storage setup.

AWo

[TheVMinator]

This is Fibre Channel.  There are 2 Fibre Channel HBA's per host and 3 targets per HBA. Path selection policy is most recently used.  Let me know if any other info is helpful

[AWo]

Are you facing any outages or problems with the running guests or do you get "only" that message?

AWo

[malaysiavm]

I suggest you to check your SAN switches log as well. Could be some problem caused from the switches.

[Sreejesh_D]

See this KB on troubleshooting ESX and ESXi connectivity to fibre channel arrays

http://kb.vmware.com/kb/1003682

[TheEsp]

Hi TheVMinator

Did you ever have any luck with your issue ?

If you have Brocade or Cisco FC switches did you see any errors in the logs ?

Cheers

David

[TheVMinator]

It turned out the 2 storage controllers on the storage system had rebooted suddenly for some reason.  Not sure why yet.

[TheEsp]

Hi TheVMinator

Hmm did you do a code upgrade for this to happen ? seems very strange for two processors to reboot. What array do you have ?

Do you have any tools to monitor the performance of your array

Cheers

David

[TheVMinator]

Unfortunately couldn't get access to any more information on the SAN side (separate SAN team)