topic Re: spindle speed in Active IQ Unified Manager Discussions

spindle speed

CCOLEMAN_ — Thu, 05 Jun 2025 06:38:17 GMT

Hey Guys,

I have a 2040HA with 12 300GBs and I want to get the best performance possible.

In order to utilize a little more disk space I have considered going from Raid-DP to Raid-4. Could this possibly impact performance?

Does anyone have any recommendations on the best way to configure this for both performance and space?

Maybe a document someone can point me towards?

mathieu_dewavrin — Thu, 05 Jan 2012 13:56:02 GMT

The Storage Subsystem Technical FAQ from Jay White on the Partner Field Portal should give you the answer. The latest is there : https://fieldportal.netapp.com/viewcontent.asp?qv=1&docid=9866 (on page 7)

In order to get the best performance (usually disk bound) I tend to go the Active/Passive way so :

Controller 1 (RAID-DP):

o Number of aggregates = 1

o RAID group size = 8

o Number of data drives = 6

o Number of parity drives = 2

o Number of hot spares = 1

Controller 2 (RAID-DP):

o Number of aggregates = 1

o RAID group size = 3

o Number of data drives = 1

o Number of parity drives = 2

o Number of hot spares = 0* (raid.min_spare_count can be set to 0 to avoid warning messages.)

That should give you an aggregate of 1434.27 GiB with a Snap Reserve at 0% (minus the root volume of 133 GiB with Ontap 8.0 + Snap Reserve)

CCOLEMAN_ — Thu, 05 Jan 2012 14:52:14 GMT

great response, thanks!

paulstringfellow — Fri, 06 Jan 2012 09:42:18 GMT

If it helps…tends to be exactly the way I work in most instance when only have 12 disks….

Normally capacity rather than performance spread across multiple controllers is more important in a “smaller” setup.

Paul Stringfellow

DDI:0151 221 3519

Tel: 0151 220 5552

Email: pauls@gardnersystems.co.uk

Twitter @techstringy