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16 Posts
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750
August 30th, 2013 09:00
NAS/OS label on lun 23-24
I've got a strange issue, we're re-provisioning a Celerra NS-120 from Raid 5 to Raid 0, I've already done one raid group and when I went to go do raid group 11 I noticed that the luns in that raid group were labeled with "Celerra_SAN_lun#_d# (NAS/OS)". Now when I did all my prep for this I didn't see or notice that label on the luns in question.
To save time, we all know that NAS/OS should live in the vault (DAE 0_0) these drives are located on DAE 1_0, and the lun sizes are WAY bigger than the ones in the vault. These are 1073gb each.
We are pretty confident that it's just a bad label but the customer wants to know how it happened. I don't think anyone intentionally did this but if anyone has seen something like this before where the Celerra improperly appended NAS/OS to the label of a lun I'd love to be able to pass that on.
The Celerra is running flare: 4.30.0.5.525 and dart: 6.0.70-4
Peter_EMC
674 Posts
0
September 3rd, 2013 01:00
not sure whats going on, but:
deleting luns, which are in use by NAS from the block part is a bad idea.
Such luns need to be deleted from the NAS part. If done correctly, there will be no NAS Luns or labels remaining in the block storage. NAS will even unbind the raidgroup if the last lun of a raidgroup is deleted.
Please check which Raid Configurations are valid from a NAS point of view. I do not think Raid 0 is one of them.
sheath72881
16 Posts
0
September 3rd, 2013 06:00
Peter, sorry I meant Raid 10, the original post was a typo, that is supported per all the documentation I've found. The luns are removed from the Celerra already and there is no customer data on the luns in question.
Our question is has anyone ever seen a lun that's has the post fix of (NAS/OS) that's not a low numbered lun?
sheath72881
16 Posts
0
September 3rd, 2013 07:00
Thanks Peter! Thats what we're thinking but that post fix of NAS/OS scared us a bit especially since no one who's touched that Celerra changed the name. We're scheduled to remove it from the storage group, reboot both data movers, then remove the luns for good on the 13th...I figure this is the safest way to know but it's always nice to have a 4th opinion.
thanks for the help!
Peter_EMC
674 Posts
1
September 3rd, 2013 07:00
ok, Raid10 (1+1) is supported.
If all the Luns are already deleted from the Celerra and you are sure, this is no SAN attached customer Lun, then just delete it.
"Celerra_SAN_lun#_d# (NAS/OS)" with a Size of 1073 GB was never a NAS/OS Lun