Advice for repository with mixed disks

[gcoly]

Dear all
hi

I have a repository server with 2 controlers:

One with Sata disks at 6 GB/s
One with SAS disks at 12 GB/s

Can I create a backup repositorie with disks of differents performances ?

Thanks
Georges

[Gostev]

Absolutely. In general, interface bandwidth is largely irrelevant - IOPS capacity is way more important. Thanks!

[driley]

Another option:
Create 2 repos, one fast, one slow.
Back up less critical VMs to the slower repo.

[gcoly]

Hi
Thanks for your advices.

I used a tool released by Microsoft called DiskSpd https://gallery.technet.microsoft.com/D ... e-6cd2f223.

The command i used is (30%read)

DiskSpd-2.0.20a\amd64>diskspd -c1000G -d10 -r -w30 -t8 -o8 -b8K -h -L S:testfile.dat

• IO/s for SATA for 8 thread is 3020 I/O per second
  IO for SAS is 3108 I/O per second

So there is no problem with my mixed disks.

Georges

[Regnor]

Your script creates 30% write not reads, also Veeam uses another block size.
Look at this KB for advises on using diskspd for Veeam:
https://www.veeam.com/kb2014