Multi-LUNs on the same raid 5 array or...?

[billpchie]

Dear all,

I would like to know which of the following would work better:
1) 4 LUNs on the same raid 5 array with 7 disks (i.e. shareing the same disks)
2) 4 LUNs on RAID 0+1 with 2 disks (i.e. separate disks)

Thanks in advance

Regards
Bill

 

[NetJunkie]

Depends. With 4 LUNs on the same 7 disks a VM could get the full use of all 7 if the other VMs are idle...so you spread the performance around. With the RAID 0+1 setups you'd have guaranteed performance on each LUN, but it can't be as fast as the RAID 5.

So..depends on your VM requirements.

 

[billpchie]

Thanks for the reply.

Sorry for the stupid question, the VMs you talking about this about the LUNs but not the OS am I correct?