Slow Parity Sync after server migration

[noacess]

I recently moved my array off a Dell R510 and on to a R630 with a SAS9207-8e connected to a Lenovo SA120.  After the move everything appeared to come up perfectly so I decided to do a parity check.  Unfortunately, its running at only ~40-50MB/s and I'm not sure why.  Prior to the move it was closer to 80 - 100MB/s.  I've attached diagnostics to the post.  Thanks for the help!

tower-diagnostics-20180814-2246.zip

[noacess]

I may have spoke too soon.  I waited another 10 minutes to so and its shot up to 130MB/s and is now hovering around 60MB/s.  I guess I don't really understand the fluctuations. 

[JorgeB]

You're using the default tunables, that might bottleneck a little with 11 disks, try these and see if there's an improvement, you can change them during the check.

 

Settings -> Disk Settings

 

Tunable (md_num_stripes): 4096
Tunable (md_sync_window): 2048
Tunable (md_sync_thresh): 2000

[noacess]

4 hours ago, johnnie.black said:

You're using the default tunables, that might bottleneck a little with 11 disks, try these and see if there's an improvement, you can change them during the check.

 

Settings -> Disk Settings

 

Tunable (md_num_stripes? 4096
Tunable (md_sync_window): 2048
Tunable (md_sync_thresh): 2000

 

 

I canceled my parity check and updated the setting to what you suggested.    Now I'm getting a sustained ~150MB/s which great.  If anyone else runs into this setting and is wondering what these settings do see here:   

 

 

 

Thanks for the help!