mdadm increase recovery sync/resync speed slow solution/fix

The units in echo are kB as in kilobyte.

Setting a high sync speed

echo 120000 >/proc/sys/dev/raid/speed_limit_min

This will increase the speed, note that sometimes a rebuild is slow due to current disk activity/iowait.

If that is not the cause then you may have a hardware issue (controller, cable or a bad drive).

Setting a lower sync speed

echo 1200 >/proc/sys/dev/raid/speed_limit_max

 

If you wanted to stop or start the check completely then check here.

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