I am having a terrible time figuring out what has happened to slow the write speeds on this newly constructed array. I was able to increase the speed of a parity check from 60Mb/s to 87Mb/s by changing the following:

 

Share settings > Case-sensitive names

Settings > SMB > Enhanced macOS interoperability

Settings > SMB > Samba extra configuration (added the below lines):

ea support = no

store dos attributes = no

Settings > Global Share Settings > Tunable (support Hard Links)

 

I have also tried enabling Turbo Write with no change.

I have also tried the "New Config" option with no change.

 

All Parity and Data drives are connected to a LSI 9211-8i flashed with IT Mode firmware.

 

Mainboard: MSI PRO Z790-P WIFI DDR4 (MS-7E06)

Proc: i7 12700k

RAM: 32GB DDR4

 

I pulled the attached diagnostic report about 7 minutes into a parity sync.

 

I have tinkered and read and read and tinkered until my brain is basically oatmeal...

 

Any and all help is greatly appreciated.

 

JM

 

 

filenest-diagnostics-20250415-1728.zip

Edited April 15, 20251 yr by jrder11
additional info

None of the changes you made should affect parity check/sync speed, unless you were also reading/writing data while doing parity check/sync at the same time.

 

Were you?

Parity knows nothing about files (shares). SMB is only about network access, which parity has nothing to do with. Turbo write is irrelevant since parity check/sync already is using all disks simultaneously. New Config doesn't do anything at all except reset your disk assignments.

 

Are you trying to write to your server while syncing parity?

I am not writing any data during the parity sync.

Don't see anything in syslog to indicate any problems accessing the disks.

 

You have a motherboard disk controller. Maybe you could retest with just those ports and however many disks it supports.

I really appreciate you taking a look at the diagnostic report!