In short... Issue this command: echo 100000 > /proc/sys/dev/raid/speed_limit_max If it does not help issue this command and send the results: cat /proc/mdstat Details below. These are related to throttling: /proc/sys/dev/raid/speed_limit_max /proc/sys/dev/raid/speed_limit_min Do "man md" for more info. The speed limits are per device, not per array. Make sure the max is large enough the permit your disks to go as fast as they can. I use 100000 (100,000K bytes/second). My disks are not that fast, and having too large of a number does not hurt. At least as a test, set the min to the same value as max. I use these commands when I want to change by hand: cat /proc/sys/dev/raid/speed_limit_max cat /proc/sys/dev/raid/speed_limit_min echo 100000 > /proc/sys/dev/raid/speed_limit_max echo 1000 > /proc/sys/dev/raid/speed_limit_min Guy -----Original Message----- From: linux-raid-owner@xxxxxxxxxxxxxxx [mailto:linux-raid-owner@xxxxxxxxxxxxxxx] On Behalf Of PAulN Sent: Thursday, August 19, 2004 1:25 PM To: linux-raid@xxxxxxxxxxxxxxx Subject: Raid5 Construction Question Hi, So I have a raid 5 which is around ~1TB and the problem I've been having is that the resync rate is really bad. This is understandable given that the raid5 has not been initialized. Does anyone know a way for me to initialize my raid5 before I use it so that the resync process doesn't run for 3 days? thanks paul Config: ------------------------------------------------- raiddev /dev/md0 raid-level 5 nr-raid-disks 7 nr-spare-disks 1 chunk-size 64k persistent-superblock 1 parity-algorithm left-symmetric device /dev/sda1 raid-disk 0 device /dev/sdb1 raid-disk 1 device /dev/sdc1 raid-disk 2 device /dev/sdd1 raid-disk 3 device /dev/sde1 raid-disk 4 device /dev/sdg1 raid-disk 5 device /dev/sdf1 raid-disk 6 device /dev/sdh1 spare-disk 0 ---------------------------------------- - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
