May 07 2010

Increasing RAID resync/rebuild speed

Category: Articles,Linux administrationFractalizeR @ 6:33 pm

Recently I assembled a server with several 2Tb disks in Linux RAID. RAID resync reported by cat /proc/mdstat showed that resync will take about 9 hours! More than my working day! I started to look for a way to increase resync speed.

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Dec 27 2009

WARNING: mismatch_cnt is not 0 on /dev/md0

Category: Articles,Linux administrationFractalizeR @ 12:37 pm

I’ve gotten cron log from one of my servers today which says:

/etc/cron.weekly/99-raid-check:
 WARNING: mismatch_cnt is not 0 on /dev/md0

That worried me a little and I decided to investigate.

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