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We currently have an NS480 and typically we use RAID5 4+1 (clar_r5_performance). We add 20 disks at a time and create 4 - RAID groups of 4+1
and then we carve each RAID 4+1 group into 2 LUNs and assign each LUN to an SP in the Clariion.
From waht I have read, this optimizes the striping and for clar_r5_performance 20 drives is a good increment to add drives.
We are now looking at doing VMview through NFS on our NS480. I would like to use AVM and do RAID10. I am not sure what number of drives
should be added at one time to optimize the striping.
Can anyone point me to what that number of drives would be or a doucment that lays that out?
I would appreciate any help...
Chris
gbarretoxx1
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Posted November 30th, 2010 09:00
Hi,
Celerra only supports Raid 1/0 with 2 disks, and usually create 2 LUNs on each Raid Group.
Gustavo Barreto.
gbarretoxx1
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Posted November 30th, 2010 09:00
Yes...exactly.
Regards,
Rainer_EMC
6 Operator
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Posted November 30th, 2010 10:00
I would suggest to just use the Storage Provisioning Wizard
Thanks Rainer,
I typically do not use that wizard but I did click through it and you still
need to know what you want to accomplish to use this wizard.
Would you agree in order to use RAID1/0 in the Celerra with
40 drives you would create 20 - 2 drive RAID groups and then
create 2 LUNs per RAID group and then assign these to the
Celerra?
Thanks for your input
Chris
Rainer_EMC
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Posted December 1st, 2010 01:00
Yes
And thats exactly what the wizard will configure for you if you tell it you want max protection
Like with the clar_r5_performance using AVM, it will be looking for 4 LUNs to stripe.
Assuming I am right on this point...
If I use 40 drives and set to max protection and it creates 20 - 2 drive RAID groups,
would it not just use the first 8 drives?
My goal would be to have AVM leverage as many spindles as each file
system is created.
I apologize for so many followups
Chris
Rainer_EMC
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Posted December 1st, 2010 03:00
SPW just creates the raidgroups and LUNs and makes them visible to the Celerra
how they are used later is up to AVM or MVM
I you want more disks involved than the AVM default for that profile I suggest creating the stripes yourself and putting them into a user defined storage pool.
This way you get both - control over layout and performance - and the ease-of-use of pools
Rainer
Rainer_EMC
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Posted December 20th, 2010 09:00
Which doc specifically?
my support matrix says 2 disk Raid10 only