What do you thing about idea of using SATA for Hyper-V?

I’m going to use MD3000i SAN and I need as much space as possible. I can add only 2 MD1000 so when I use SAS 400GB in RAID 10 it could be not enough. I need this for about 80-100 Virtual machines and I just wonder about what I should chose RAID 5 with SAS or RAID 10 with SATA.
I like SATA idea because I can use 1TB drives what will give me plenty of space but I afraid performance issue. What is your opinion about this and what advice can you give me.
Thanks for your help.

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Comments

dynamik

RAID5 might be useful for something where you need a lot of storage that's not going to be subject to heavy writes, like an archive. I wouldn't put VMs on it though. What kind VMs are these going to be? It looks like you can mix and match SAS and SATA, so can you find a combination that'll allow you have increased storage but also higher performance where you need it?

astorrs

Have you committed to the MD3000i yet? If not you should really consider the CX4-120. You could use FC drives in RAID5 (4+1) groups and then stripe MetaLUNs across them (say you had 25 disks for VMs, each LUN would stripe across all 25 spindles). Combined with the 6GB cache you will likely get RAID10 like (or better especially when compared to the MD3000i) performance. A FLARE code upgrade due in a month or two will allow you to do thin provisioning of the LUNs too (which is what you were talking about doing for Hyper-V failover). Something to think about if its an option.

PiotrIr

astorrs wrote:

Have you committed to the MD3000i yet? If not you should really consider the CX4-120.

Many thanks for your reply.
I wish to have budget for this

unfortunately I must stay with AX4 but I will use RAID 1+0.