troubleshooting Question

ESXi v5.5 communication issues with my iSCSI SAN - Dell md3200

Avatar of gopher_49
gopher_49 asked on
VMwareDell* SAN
6 Comments1 Solution339 ViewsLast Modified:
My ESXi v5.5 Dell Update 3 server quit talking to my Dell md3200i iSCSI SAN.  This caused all VMs to stop responding...  The iSCSI SAN was deployed with best practice in regards to dedicated VLANs and vSwitches for each iSCSI port.  I'm using the  VMWare method for redundant pathing... Where do I start to troubleshoot what happened?  I downloaded the vmkernel logs.. I had errors pertaining to performance and not being able to talk to my iSCSI SAN.  Now I just see logs like below... When I see these things are working just fine.. But..  A day ago I had other logs pertaining to it not being cable to communicate with the SAN.  Should I maybe update the firmware on my Dell md3200i?

2017-03-06T20:52:37.456Z cpu6:34103)ScsiDeviceIO: 2363: Cmd(0x412e807f3b00) 0x4d, CmdSN 0x22 from world 34103 to dev "naa.6001c230d9b57b00164feeed1031d490" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x20 0x0.
2017-03-06T20:52:37.456Z cpu6:34103)ScsiDeviceIO: 2363: Cmd(0x412e807f3b00) 0x1a, CmdSN 0x23 from world 34103 to dev "naa.6001c230d9b57b00164feeed1031d490" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x24 0x0.
2017-03-06T20:59:27.835Z cpu6:32795)NMP: nmp_ThrottleLogForDevice:2349: Cmd 0x1a (0x412e80819800, 0) to dev "mpx.vmhba0:C0:T0:L0" on path "vmhba0:C0:T0:L0" Failed: H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x20 0x0. Act:NONE
2017-03-07T14:19:28.194Z cpu5:32794)WARNING: ScsiDeviceIO: 1223: Device naa.6842b2b00012d53300008bd957dbb540 performance has deteriorated. I/O latency increased from average value of 24108 microseconds to 602199 microseconds.
2017-03-07T14:19:29.808Z cpu1:36047)ScsiDeviceIO: 1203: Device naa.6842b2b00012d53300008bd957dbb540 performance has improved. I/O latency reduced from 602199 microseconds to 119635 microseconds.
2017-03-07T14:19:33.209Z cpu6:36250)ScsiDeviceIO: 1203: Device naa.6842b2b00012d53300008bd957dbb540 performance has improved. I/O latency reduced from 119635 microseconds to 47817 microseconds.
ASKER CERTIFIED SOLUTION
Grant Berezan
Senior Network Engineer

Our community of experts have been thoroughly vetted for their expertise and industry experience.

Join our community to see this answer!
Unlock 1 Answer and 6 Comments.
Start Free Trial
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 6 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros