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06-21-2015 03:11 PM
06-21-2015 03:11 PM
I need to restore something from a snashop lun.
So I went to the volume and set the snapshot online
Then rescanned my hosts in vsphere and tried to add it with the option of assign new signature.
but keep getting an error saying an unknown error has occcured.
any idea?
Solved! Go to Solution.
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06-21-2015 07:22 PM
06-21-2015 07:22 PM
Re: mounting snapshot lun
Hi Tony,
Most likely what is happening is the Snapshot is online but it's not writable. In order to mount a snapshot of a VMFS filesystem, as you correctly pointed out, you'll need to Re-signature thus the snapshot needs to be writable as well. What you want to do is:
1) create a clone from the existing Snapshot
2) Host Rescan
3) Add Storage
4) Select the cloned volume
5) Add new Signature
The snapshot will mount as "Snap-xxxxxxxx-Original-Datastore-Label"
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06-22-2015 07:21 AM
06-22-2015 07:21 AM
Re: mounting snapshot lun
I tried cloning the snapshot lun but when i go to add lun, it showed 2 luns available to add and only gave the format lun option
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06-22-2015 07:43 AM
06-22-2015 07:43 AM
SolutionHi Tony,
Hi Tony,
Assuming you're running ESXi 4.0 or above and the LUN is a clone of an existing VMFS datastore and not an RDM, you should have 3 options: a) Format b) Assign New Signature c) Keep existing Signature
Here's the process
Additionally, you may want to place a quick call into the Support center. It should be pretty straight forward to get to the bottom of this.
Cheers
Nick
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06-22-2015 08:16 AM
06-22-2015 08:16 AM
Re: mounting snapshot lun
+1 to the above.
I'd also recommend doing the process of cloning the snapshot through the vCenter plugin (available from NimbleOS 2.1.4.0 and above), as it will create the clone, mount it up, resignature the datastore and make it available for you in a 1-click process.
Global Storage Field CTO & Evangelist
twitter: @nick_dyer_
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09-04-2020 01:00 PM
09-04-2020 01:00 PM
Re: mounting snapshot lun
i have the same issue. i created the volume from a snapshot, and when i try to add storage, the only option listed is format. the other two are greyed out.
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a week ago
a week ago
Re: mounting snapshot lun
Make sure you uncheck the Snapshots box when presenting the volume, that way only one copy is being presented to VMware, this is an issue I've seen as they are both on by default.
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