Nearline SAS IOPS?
I'm just looking at the performance of our storage array and have run the Microsoft Assessment and Planning Toolkit which has given me some figures. Namely:
159% Disk Read Time
3.64% Disk Write Time
27.65% Disk Idle Time
The array is 14x 1TB 7.2k RPM Nearline SAS drives, running in a single RAID 5 array.
Now, to me, the IOPS seems high.
As I'm currently planning a repurpose of the system to become more of a unified storage device, handling VMs too, does this make sense:
Set up 2 pairs of 2 disks as LUN disks in RAID 1 (1 pair for the SQL server, 1 pair for the VMs), then set the rest up in a couple of RAID 10 arrays? (I know this would leave 2 disks, but this could also be a RAID 1).
Am I right thinking that this will speed up read access, as RAID 1 increases read time?
Figured out that a single piece of software was churning through IOPS as it was malfunctioning... Switched it off and Disk Read Time has falled to 80% and IOPS down to 400. So, I don't think I have anything to worry about in the end!
Excellent detective work!!!
If anyone wants to know what it was, it was Spiceworks doing its network scans and network health scans. Turning them off stopped the crazy IOPs.
So, Spiceworks will now be moving to its own box!