Hi there,
in preparation of our next planned SRM failover we test the attach - mount - unmount - detach procedure.
We found that detaching SCSI deviced from our hosts takes ~30 sec per device per host. In a cluster with 11 hosts and 40 devices to be detached this will last ~3.5 hours :-(
Is this behaviour expected?
We didn't find the root cause for the process taking so long. What we saw is that disabling PP/VE and VAAI will speed up the process but only to the times I mentioned above. With PP/VE and VAAI activated this process takes up to 4min per device per host.
We trigger the process via Power CLI.
ESXi5 U1 latest patches
EMC VNX 5700 FLARE 5.31.000.5.716
Thanks for any idea how to speed up the process or to find the cause for this taking so long.
Best regards,
daniel