Question about hardware combo porformance

[Pstark]

Current build:

Supermicro H12SSL-I

EPYC 7302P

96GB ECC 3200 Mhz

LSI 9300 16i HBA

Array;

Parity drive: 18 TB EXOS SAS

Disk 1: 18 TB Ultrastar DC HC550 SATA

Disk 2: 18 TB EXOS SATA

Disk 3: 18 TB EXOS SATA

Disk 4: 12 TB EXOS SATA

Disk 5: 12 TB Iron Wolf (not pro) SATA

Disk 6: 10 TB HGST He10 SAS

Disk 7: 8 TB Red Plus SATA

 

Bought the SAS EXOS drive with the intention of removing the 10 and 8 TB drives from the array and I expected to get better IO performance due to the SAS drive being the parity drive. I'm not using turbo write so drives not being used can spin down but ~150MB/s is not what I was expecting. Am I expecting to much? All drives are healthy. Enabling turbo write doesn't affect IO performance either.

 

Disks 0 (parity) through 4 are in a NORCO SS-500

Disks 5 though 7 are in another NORCO SS-500

 

I use these cables-  Internal Mini SAS to SATA Cable, SFF-8643 to SATA Breakout https://a.co/d/2hSam69

 

Edited April 4, 2023 by Pstark

[itimpi]

Write speed to the array is always limited due to the overheads of updating parity in real time.  This is described in more detail here in the online documentation.

[Vr2Io]

On 4/4/2023 at 5:31 PM, Pstark said:

Am I expecting to much ?

Yes, turn on turbo write would better a lot but don't expect so much.

 

You have 96G RAM, it may cache much data for some help.

Edited April 8, 2023 by Vr2Io