best practice for removing a raid group

Question

I have a Raid-5 group that host two luns. The group consists of 7 268.4 GB disks. I inherited this systems and I am not sure if the LUNs are being accessed by hosts or not. If the LUN's are not active, I would like to recover the space because we are running short on another RAID--5 group that could use the extra drives.

How can I find the host that accessed those lun's and when they last contacted?
Is there a way to disable access the raid group to prevent host from accessing it just before deleting it

AranH1 · Answer

If you look at the properties of the LUN one of the information tabs is named Hosts. If there are hosts listed there then the LUN is assigned to a storage group along with hosts, which provides access from a host to a LUN.

You could also manually look through your Storage Groups and see if those LUNs are assigned to any Storage Groups. The assignment of a LUN and a Host to a Storage Group is the method for masking (providing access) a LUN to a host on a CLARiiON. If you don't have any Storage Groups (or see the container in Navisphere) then you don't have Access Logix enabled and should only have one or two hosts connected to the array.

Yodawoda · Answer

The LUN is assigned to Storage group but there are no hosts assigned tio that group so I infere that no host is connecting to that LUN.

If delete storage, what am I deleting. Am I delering the LUN of the RG??

Allen Ward · Answer

If you have confirmed that no hosts are accessing the LUNs (which you have by verifying that no hosts are in the Storage Group) you first need to remove the LUNs from the SG, then you can destroy the LUNs. Once they are removed you will be able to destroy the Raid Group and reuse the drives however you see fit.

CLARiiON

best practice for removing a raid group

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