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1087
July 18th, 2010 13:00
Reconfigure Disk Layout on NS-120
Hi All, I am after help with the following.
We recently had an EMC consultant (from a Partner) configure our Celerra NS-120. This is equipped with 15 x FC drives in disk shelf 0 (5 x vault drives + HS located in slot # 5) which left us with 9 remaining. The 2nd disk shelf has got 15 x FC drives and a 3rd shelf has only 1 x FC drive. We have another disk shelf that has 15 x SATA drives but I am not concerned about that (The backend is a Clariion CX4-120).
During the initial configuration, Setup_Clariion was run and was configured as below:
Disk shelf 0 = 1 x R5 (4 + 1) (these are the vault drives), 1 x HS and the remaining 9 drives configured for R5 (8 + 1).
Disk shelf 1 = 3 x R5 (4 + 1)
Disk shelf 2 = 1 x HS (as there was nothing else we could do with this disk)
Within Celerra Manager, when creating file systems we get the option of R5-Performance (the aggregate of all the R5 4 + 1)s, and a R5-Economy (the R5 8 + 1).
We have got file systems created within the R5-Performance disks but nothing as yet from the R5-Economy.
What we would like to do and this is my question, is reconfigure the disk layout. We would like to remove the R5 8 + 1 disks from Disk shelf 0 and insert them into Disk shelf 2, which would then give us the correct amount of disks to do 2 x R5 4 + 1, thereby giving us the ability to use R5-Performance all round.
Is this possible, i.e can we remove disks from Disk shelf 0, and is it possible to rerun Setup_Clariion to reconfigure as I have mentioned above? I know when I run Setup_Clariion it only gives the option to reconfigure Unbound disks, so wondering if another utility is used for this?
Any feedback would be greatly appreciated.
Regards,
Mark
ral67_xyz
147 Posts
0
July 18th, 2010 13:00
Hi Mark,
welcome to the forum.
yes, you can reconfigure *if* the disks arent used yet.
You can check that with the GUI or nas_disk or /nas/tools/whereisfs
First use the GUI or nas_disk -perm - unbind to remove them from the Celerra
Then I would suggest to not use setup_clariion, but use the Storage Provisioning Wizard instead - it allows for greater flexibiliy (like spanning DAE's) than setup_clariion.
see attached for some examples on how to use the SPW - I think there is also a video demo about it on Powerlink
Rainer
P.S.: of course what you cannot change are the first 5 disks where the Clariion and Celerra OS are located - they need to stay at RAID5 4+1
1 Attachment
How_to_configure_storage_using_SPW.pdf
markmajor
2 Posts
0
July 18th, 2010 13:00
Hi, thanks for the fast response.
We was told by the consultant who comissioned this that disks cannot span across DAE's in a Celerra, but from your answer you can but not using the Setup_Clariion. I guess the easist way would be (if possible rather than physically relocating drives) to delete the R5 8 + 1 and the HS from Shelf 0 (in slot #5), that would give us 10 disks usable in DAE0 to assign as 2 x R5 4 + 1 (in addition to the vault drives), and the drive that is on its own in shelf 2 could be the HS. Does that sound achievable?
Also when you say if the disks aren't used yet, the only thing that has been done is that they have been configured using the Setup_Clariion, which by the looks of it creates the RAID group and binds 2 LUNs to it, one assigned to SPA and one to SPB, again does that sound correct?
Thanks again for your help, much appreciated.
Regards,
Mark
ral67_xyz
147 Posts
0
July 18th, 2010 14:00
Hi Mark,
its absolutely supported these days for Celerra raidgroups to span DAE's.
setup_clariion is an old tool from a time when (large) NS Integrated where configured by EMC only and had lots of disks and static configs.
doing shelf-by-shelf templates made config and addition easy
We do still try to stay within the DAE - easier to troubleshoot and minimizes the impact of a DAE failure - but that is sometimes difficult on small systems
I you can tolerate some empty slots I would configure 4+1R5,HS,4+1R5 in the first DAE and 3x 4+1R5 in the rest
your suggestion would work as well - I guess we usually keep a hotspare in the first DAE since its also the DAE that is powered by the SPS for the vault.
With "Used" I mean that no file systems or savvols have been built on them
yes, thats what setup_clariion or the SPW does (plus adding them to the Celerra storagegroup and setting some params)
see http://powerlink.emc.com/km/live1/en_US/Training/Demo/How_to_provision_unused_disks_with_CSA.exe
located at
Rainer
sebbyr
99 Posts
0
July 18th, 2010 15:00
Mark.
It is highly recommended that before you plan on pulling an moving didisks around, that you contact es disks around, you contact your local account representative. Even if this Celerra is not in production, and there are no filesystems, it is still dependent on some of these disks for its control LUNs. If these are taken away, the Celerra will not boot up, and you would need it re-installed.
Thanks.
- Sebby Robles
ral67_xyz
147 Posts
0
July 18th, 2010 16:00
well - The first five disks shouldn't be moved - but they should have big red warning stickers on them saying so
for the rest - make sure you know which is which and that they are shown as UNBOUND
there's also a navicli command to make them "blink"
if you are unsure you can always involve EMC customer service
Rainer