Les choses qui marchent chez moi (il y a déjà un bitmap) :
- sysctl -w dev.raid.speed_limit_max=9000000
- sysctl -w dev.raid.speed_limit_min=900000
- blockdev —setra 65536 /dev/md0
- echo 32768 >/sys/block/md0/md/stripe_cache_size
root@foobar : # cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid5 sdc1[0] sdh1[5] sdg1[4] sdf1[3] sde1[2] sdd1[1] 9767564800 blocks super 1.2 level 5, 512k chunk, algorithm 2 [6/5] [UUUUUU] [========>............] reshape = 40.0% (781647868/1953512960) finish=442.0min speed=44182K/sec bitmap : 15/15 pages [60KB], 65536KB chunkunused devices :