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remove unmounted datastore from vSphere 5.0 no access to storage device

Posted on 2014-04-30
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Last Modified: 2014-05-05
Greetings,

I detached and unmounted three datastores from the same SAN. I am unable to unpresent the datastores / LUNs from the SAN.

How do I remove the italicized, unmounted datastores / LUNs from the ESXi 5.0 host / vSphere 5.0 if the SAN is not physically available?

Thanks a lot
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Question by:rpliner
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by:Andrew Hancock (VMware vExpert / EE MVE)
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Does, a Re-scan and Re-fresh not remove the datastore?
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by:rpliner
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no. However, the SAN is still connected, but is not operational otherwise, so the LUNs cannot be unmapped. The SAN has been rebooted and still does not work (can't get to interface, or get kicked off within a few seconds), so it is about to be removed physically from the rack.

Should I power off the SAN then refresh / rescan from vSphere to see if that removes the datastores? I didn't want to get to an APD situation.

I was asking because I am going to remove the SAN physically then remove the unmounted, italicized datastores from the cluster right after. Need to do this now since I am at the datacenter, that's why I don't even want to troubleshoot the SAN - it's coming out anyway, but I don't want those datastores hanging around unmounted.

thanks for the help
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by:Andrew Hancock (VMware vExpert / EE MVE)
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by:rpliner
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that is quite a bit of stuff. It appears I would still need to reboot the host.

Is it certain that if I power off the SAN and rescan through vSphere an APD situation will occur?
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found out that the Promise SAN does not have a LUN mapping. Since I did not explicitly map the LUNs to the hosts, the hosts see all LUNs on the SAN through active iSCSI sessions.

They recommended either disabling the session in vSphere by right-clicking the unmounted datastore, choosing manage paths, then right-clicking each path and choosing disable. After which I should rescan and the datastore should be removed.

They also said I should be able to power off the SAN and then rescan. They stated this would have the same affect as the previous recommendation since the active iSCSI sessions will be deactivated since the SAN is powered off.

any thought much appreciated.
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so, powering off the SAN did it. Datastores removed.

However, two of my NICs are now showing down (red X on the NIC). I have two NICs on one vSwitch and two NICs on another vSwitch. These are storage vSwitches only. One NIC on each vSwitch showed down as soon as I powered off the SAN.

What does powering off the SAN have to do with the NICs on these vSwitches?

Any ideas on troubleshooting why they are down?

Thx again
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by:Andrew Hancock (VMware vExpert / EE MVE)
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nothing unless they are connected directly to the SAN?

but usually physical nics are connected to a physical switch.
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by:rpliner
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yeah, one to one storage switch, one to the other. Both switches are functional.

well, at least the datastores are removed. Now on to this.

thx
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by:rpliner
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chose mine since the storage vendor recommended these steps, and it worked.
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