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How to find out the emc Clariion LUNS not in use ?

Posted on 2012-04-05
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Last Modified: 2012-09-05
Hi Experts,

Has any body worked on this ? I need some help to figure out - How to find out the EMC Clariion LUNS on RHEL 5.7 & Solaris 10 so that we can get rid of those.

Thanks a lot Experts :-)
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Question by:rajsolaris
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Expert Comment

by:arnold
ID: 37814569
You should check the navisphere to see which LUNs are allocated and to which hosts.
Then you can check the hosts.
On redhat you have to look at /proc/scsi/<hba>
There are different tools
fdisk -l
format on Solaris will list all the disks it sees local and San based.
Each system will have the LUN info which you then have to confirm it is not n se, or stop using it, and then unallocated from the host.
https://community.emc.com/thread/114410 references analyzing LUN performance. Using a similar tact if the statistics do not change, it will suggest that te LUN might not be actively used which you MUST confirm.
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Author Comment

by:rajsolaris
ID: 37817109
Thanks for getting back arnold.
I can not access emc218359 in the powelink - looks like need to be a partner OR customer
I do not have an account having that previlege.

We have powermt installed on both solaris & Linux RHEL 5.7 so I ran multiple commands like

# powermt display dev=all

Okay, I just got a tip from my friend for Linux -

# pvs 2>/dev/null
# powermt display dev=emcpowerat
and check the status in the pvs command. But I am not sure on solaris.
we have svm installed on solaris

Thanks again.
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arnold earned 2000 total points
ID: 37817140
Within navisphere on the SAN, can you see which LUNS are allocated to each host?
do you have powerpath on either/both to manage the multipathing or you use native linux multipathing

http://www.expertslogin.com/linux-administration/show-luns-allocated-on-linux/
PVS is if you use LVM filesystems on the LUNS.
Depending on what the servers do, your allocated LUNs could be used in raw form.
There are many variations.

Solaris, format should list all the disks that are seen note the make of the disk.
powermt works the same way.
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