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September 10th, 2020 02:00
Mounting a copied Volume
I've copied one of our volumes via storage manager and want to present this back to the cluster it was copied from. I have to restore something on the drive, but don't want to restore the whole volume. The volume can be seen in disk management on the cluster nodes, but i'm unable to bring it online. It tells me "The specified disk or volume is managed by the Microsoft Failover Clustering component". I figured it was due to the duplicate disk ID from the volume I have copied. But I'm unable to change this. Output from diskpart is below..I've tried presenting it to a single host too with the same results. Any advice please what I am missing?
DISKPART> select disk 8
Disk 8 is now the selected disk.
DISKPART> detail disk
COMPELNT Compellent Vol Multi-Path Disk Device
Disk ID: {46856598-9797-482E-85DC-E166A98763BD}
Type : iSCSI
Status : Reserved
Path : 0
Target : 6
LUN ID : 1
Location Path : UNAVAILABLE
Current Read-only State : Yes
Read-only : Yes
Boot Disk : No
Pagefile Disk : No
Hibernation File Disk : No
Crashdump Disk : No
Clustered Disk : Yes
There are no volumes.
DISKPART> attributes disk clear readonly
DiskPart failed to clear disk attributes.
DISKPART>
DELL-Sam L
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September 10th, 2020 09:00
Hello steveh999,
Which Compellent system do you have as you didn’t state it your post? What is the current version of SCOS on your compellent? What is the version of windows that your host is using? Are you using instant replay?
steveh999
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September 14th, 2020 01:00
Its a SC5020 compellent. SCOS version is 7.2.40.36 and servers are 2012 R2. No we're not using instant replay. I think the issue is what do I need to do to the disk to make it accessible to the hosts. its being presented, i just can't access it. I was doing some more digging and thinking I need to run "Clear-ClusterDiskReservation -Disk x" on the disk, then re-add it to the cluster. but wanted advise on that really.
DELL-Sam L
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September 14th, 2020 15:00
Hello steveh999,
When you presented the volume to the host did you map it to the cluster?
steveh999
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September 15th, 2020 00:00
Hi, yes I tried to the cluster and to a single host. Both gave the same message below..
DELL-Sam L
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September 15th, 2020 16:00
Hello steveh999,
Let me check into this deeper and I will see what steps need to be done to resolve this.
steveh999
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September 18th, 2020 04:00
Hi, were you able to find out what is required? are you able to provide any further help on this?
DELL-Sam L
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September 22nd, 2020 14:00
Hello steveh999,
When you present the volume to a different host you will need to disable the persistent mappings on the copied volume then mount it in disk management after that time. Once that is done it should come online & be accessable.
steveh999
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September 28th, 2020 01:00
ok, so how do I disable the persistent mappings on the copied volume?? Are you able to detail the process for that?