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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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LVL 119
ID: 40032135
Does, a Re-scan and Re-fresh not remove the datastore?
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Author Comment

by:rpliner
ID: 40032183
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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Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 40032343
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NAS Cloud Backup Strategies

This article explains backup scenarios when using network storage. We review the so-called “3-2-1 strategy” and summarize the methods you can use to send NAS data to the cloud

 
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Author Comment

by:rpliner
ID: 40032369
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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Assisted Solution

by:rpliner
rpliner earned 0 total points
ID: 40032420
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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Accepted Solution

by:
rpliner earned 0 total points
ID: 40032603
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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LVL 119
ID: 40032698
nothing unless they are connected directly to the SAN?

but usually physical nics are connected to a physical switch.
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Author Comment

by:rpliner
ID: 40032746
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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Author Closing Comment

by:rpliner
ID: 40041641
chose mine since the storage vendor recommended these steps, and it worked.
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Featured Post

NAS Cloud Backup Strategies

This article explains backup scenarios when using network storage. We review the so-called “3-2-1 strategy” and summarize the methods you can use to send NAS data to the cloud

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