Lost acces to volume due to connectivity issues

[tdubb123]

Lost access to volume 51d1f97b-539943a2-6fff-782bcb44e4d1 (xxxxxx) due to connectivity issues. Recovery attempt is in

progress and outcome will be reported shortly.

info

3/22/2014 10:10:35 AM

xxxxx

Then 1 secs later I see

Successfully restored access to volume 51d1f97b-539943a2-6fff-782bcb44e4d1 (xxxxxx) following connectivity issues.

info

3/22/2014 10:10:36 AM

xxxxxxx

I keep getting the above message on some esxi hosts. any idea?

I keeps happening for all the luns.

[tdubb123]

I do see prior to losing access

Device naa.60a9800037533352703f44306b4d454c performance has deteriorated. I/O latency increased from average value of 11953

microseconds to 263450 microseconds.

warning

3/22/2014 10:17:00 AM

xxxxxx

would the I/O latency cause a lun disconnect?

[a_p_]

Issues like this are usually seen when there are either network or FC issues, which might cause e.g. CRC errors. Double check the network switch ports for errors to find out whether this is the case.

André

[tdubb123]

I am using Fiber channel. You think this has to do with the fiber channel switches?

[a_p_]

I had to troubleshoot such an issue a few weeks ago, and found a bad FC cable which was the root cause for this. The FC port to which it was connected showed a high number of CRC errors.

André

[tdubb123]

how do you find crc errors on FC ports?

[a_p_]

Depending on the switch model, you can find the port/SFP statistics in either the CLI or the web GUI.

André