hi all,in my vCenter "task and events "all esxi host show device naa.xxxxx io latency ,even sometimes show 'because of connectivity problem lead to the loss of volume xxx access,trying to restore' .my esxi is 5.5update3a,storage is huawei iscsi disk 。i found vob.log so many ［esx.problem.scsi.device.io.latency.high］device naa.xxx performance has deteriorated.io latency increase from average value of xxxx microseconds。
in vmkernel.log scsideviceio:2363:cmd （0*413xx）0x93,cmdsn xxx from world xxxx to dev ‘naa.xxxx’ failed H:0x0 D:0x2 P:0x0 valid sense data :0x7 0x27 0x0.
can anyone help me, please.
Performance deteriorated messages are most likely related to "Queue Depth" issues. Storage is being over utilized.
how can exactly locate is storage problem or transport storage flow network or other reaon. (storage network is two link 10gb )storage vendor response storage not over utilized , say esxi esxtop ATSF value is high ,but i don't known VAAI 'part ATS any connection about my problem. thanks