Disk Mirroring on Proliant 580G2

[Alex Hose]

I have four disks on my new Proliant Servers. I am planning to have two partions (C and D partition. I would like to implement Raid 1 (Mirroring). Two strategies:

Plan 1. Install C and D partition on Disk 1.
Disk 1 and Disk 2 are part of Raid 1 ( mirror)
Disk 3 is hot spare for the mirror.

Plan 2: Install C on Disk 1
Install D on Disk 2
Disk 1 and Disk 3 are mirrored
Disk 2 and Disk 4 are mirrored

Which plan is better and why?

[JohnWRuffo · Accepted solution]

Your second plan is a much beter use of the SCSI channels. If you split the I/O bandwith across two channels of the dual channel 5i you will see a better performance then having both mirror on their own channel.

When you use the ACU you will see these drives as SCSI ID's 0, 1, 2 & 3

so...

0 => 2
&
1 => 3

G'luck! -john

[Anand Baghel]

hi Alex,

Using the plan 2 will result in loss of disk space the overall disk space will be only of 2 disks. I would rather suggest a raid 5 set with three disks and one assigned as a hot spare. this will be best in redundancy as well as storage capacity, rest all depends on your requirement.

Thanks.
Anand Baghel.