LUN configuration

[curiousagain]

Hi,

I have an EMC SAN with 4 disks of 1 TB (4TB total), I have configured RAID 10 so currently have 2 TB active.

Each VM consumes 60-80 GB HD, so this SAN can serve 25-35 VM's.

My question is, what is the best LUN size in this case? (note that all VM's have more or less the same I/O load).

Thanks.

[AndreTheGiant]

You can create 3 or 4 LUNs.

You have a AX4, right?

I suggest 2 LUNs (to have less that 20 VM on the same LUN) each on a different SP.

You can also use this site:

http://www.gabesvirtualworld.com/?p=68

But the big problem is that all LUNs are on the same disks, so IMHO it does not make sense to have a lot of LUNs.

Andre

[curiousagain]

I'm using the "StorCenter Pro ix4-200r".

you wrote "Each on different SP", what is SP?

I read the article that you send but by his calculation I need LUN of 2 TB !!! which is all the space I have.

[AndreTheGiant · Accepted solution]

you wrote "Each on different SP", what is SP?

SP are store processore, but in your case I think you have only 1 SP.

I read the article that you send but by his calculation I need LUN of 2 TB which is all the space I have

Yes, but you have also to limit the number of VMs on each LUN.

Andre