raid choise for Windows repository

[1dna]

Helloo Panel,

I hope some of you mind sharing our input.

I have a alletra 4140 with 30x20 TB on each 932i controller.

Ive started out with 30x20 in raid60 due to most amount of speeds and safety with disk in mind ( note we have another alletra offsite running raid6 and hardend repository) so we have multiple copies.

we rencently switched to this as primary (physical proxy taking backup from storage snapshots).

we are running it with 256gb of mem and 2x intel xeon gold 6526Y.

Currently we have formated it

Disk raid

Stripesize : 256KB
Raid Type: 60
Disk groups: 2

Filesystem: Refs
64kb blocks

OS Windows 2025

performamnce

1:
We have tried running it in a SOBR - but as using data locallity it will only fill on 1 controller at the time which bring down to 1 controller not being used. (is switching to performance instad a valid way?)

We have split the sobr into 2 separate repository aswell and tried splitting the jobs to raise the paralism.
Speeds varies about 1,5 GB/S to 2,5 GB/S - Reads is fast.


Asking:

Im not really sure if this is what to expact from a Repository - as Raid60 has some penalities and as we are using syntethic fulls it seems like these raid 60 is taking a write penalities. also for none cached writes.

As we have split the raids i have an option to change raid configuration as we only have moved some data and its not showing satisfying results compared to testing, but hey always something in the wonderfull world of it.

to find a balance where write speeds is prefered but data security and stability is a must - anyone can recommend a different raid level? should we go to 128 KB instead?

i hope for some input

[pybfr]

My most urgent recommendation wouldn't be to change the RAID but the file system and use Veeam Hardened Repository iso which would give a much more stable, trouble free and immutable repository, especially if you are already using in other places. There nothing a windows repository will do better than an XFS one, and a lot it will do worse.

[edh]

We largelly used RAID 60, how many colums did you used for create your raid 60, 4? 8?

As columms i wanna say raid-subsets of RAID 6, and how many disk per subset.

More subsets = more speed, but less capacity.

Modify: Sometimes more subsets is better move to RAID 10. Then you will get some extra write capacity.