Thread: about periodic check of MD devices

i use ubuntu11.10 64 bit. works raid1 softraid.
works well. aware of thing there crontab related mdadm. runs schdule checks periodic redundancy checks of md devices @ first sunday of month.

server runs under heavy load
if close cron problem ?

how can close cron?

if you, wouldn't remove it. default setting sync_speed_min 1000, meaning when there's other load, add 1mb/sec of i/o (granted, more random seeks thrown in, nothing proper readahead tuning can't take care of). on other hand, job quite useful in reporting data inconsistencies. can occur during power failure, system crashes, hardware errors (controller, bus or cable problems) or -- , that's pretty guaranteed -- normal drive use. see this article more in-depth explanation of bit error rate.

in short, cron job useful (provided monitor results) , shouldn't affect server performance.

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