parity 2001b4d2041407574 (sda) 3906249932 * 4 TB - 0 43 0

disk1  [browse /mnt/disk1] 2001b4d2092112206 (sdc) 2930266532 * 3 TB 3 TB 43 0 0

disk2  [browse /mnt/disk2] 2001b4d2032642902 (sdd) 2930266532 * 3 TB 3 TB 43 0 0

flash  [browse /boot (flash device)] Patriot_Memory - 16.01 GB 15.95 GB 315 48 0

 

Array Status

Started Stop will take the array off-line.

Parity-Sync in progress. Cancel will stop Parity-Sync.

WARNING: canceling Parity-Sync will leave the array unprotected!

Total size: 4 TB

Current position: 261.91 GB (7%)

Estimated speed: 137.6 MB/sec

Estimated finish: 453 minutes

parity 2001b4d2041407574 (sda) 3906249932 * 4 TB - 0 43 0

disk1  [browse /mnt/disk1] 2001b4d2092112206 (sdc) 2930266532 * 3 TB 3 TB 43 0 0

disk2  [browse /mnt/disk2] 2001b4d2032642902 (sdd) 2930266532 * 3 TB 3 TB 43 0 0

flash  [browse /boot (flash device)] Patriot_Memory - 16.01 GB 15.95 GB 315 48 0

 

Array Status

Started Stop will take the array off-line.

Parity-Sync in progress. Cancel will stop Parity-Sync.

WARNING: canceling Parity-Sync will leave the array unprotected!

Total size: 4 TB

Current position: 261.91 GB (7%)

Estimated speed: 137.6 MB/sec

Estimated finish: 453 minutes

Way better than most.  I've never seen speeds much above 75-80 MB/sec on my newer array.

Joe, is that on average or at all? my not so new array using nothing special hardware starts over 110MB/sec

Joe, is that on average or at all? my not so new array using nothing special hardware starts over 110MB/sec

It entirely depends on the motherboard, disk controller, and disk hardware involved.

See here:

http://www.lime-technology.com/wiki/index.php/User_Benchmarks

The performance looks about right assuming your 3TB drives are 7200rpm units.

 

With my newest array, using all 3TB WD Reds (which spin ~ 5900rpm), I get ~ 120MB/s in the early stages of a parity check.  Yours is at 7%, so it's also very early.    As it moves towards the inner cylinders you'll see it slow down a bit (significantly so as it gets ~ 80%).