HowTo: Speed Up Linux Software Raid Building And Re-syncing
Jun 17, 2010, 07:32 (1 Talkback[s])
(Other stories by Vivek Gite)
[ Thanks to An Anonymous Reader for
this link. ]
"It is no secret that I am a pretty big fan of excellent Linux
Software RAID. Creating, assembling and rebuilding small array is
fine. But, things started to get nasty when you try to rebuild or
resync large size array. You may get frustrated when you see it is
going to take 22 hours to rebuild the array. You can always
increase RAID resync performance using the following technique.
"Recently, I build a small NAS server running Linux for one my
client with 5 x 2TB disks in RAID 6 configuration for all in one
backup server for Mac OS X and Windows XP/Vista clients computers.
Then whey I cat /proc/mdstat it reported that md0 is created and
resync is in progress. The resync speed was around 4000K/sec and
resync will complete in approximately in 22 hours. I wanted to
finish this early."