Hi, short update: Seems nothing is wrong here, except I didn't look carefully enough and missed that ext4lazyinit is actually still running and thus causing those writes. I assume, once it finishes its job everything will be as expected. Sorry for the noise. Happy New Year. Thanks, Norbert Am 30.12.19 um 04:11 schrieb Norbert Weinhold: > Hi, > > I currently experience a "problem" with a raid5 I built. As soon as I have mounted the filesystem on it (ext4) > a md127_raid5 process will do writes every few seconds to all the members: > > md127_raid5(4044): WRITE block 16 on sdb1 (8 sectors) > md127_raid5(4044): WRITE block 16 on sdc1 (8 sectors) > md127_raid5(4044): WRITE block 16 on sda1 (8 sectors) > md127_raid5(4044): WRITE block 16 on sdg1 (8 sectors) > md127_raid5(4044): WRITE block 16 on sdh1 (8 sectors) > md127_raid5(4044): WRITE block 8 on sdb1 (1 sectors) > md127_raid5(4044): WRITE block 8 on sdc1 (1 sectors) > md127_raid5(4044): WRITE block 8 on sda1 (1 sectors) > md127_raid5(4044): WRITE block 8 on sdg1 (1 sectors) > md127_raid5(4044): WRITE block 8 on sdh1 (1 sectors) > > Disabling the journal of the filesystem does not make a difference. Same for changing the bitmap to none for > the RAID. I'm wondering what is happening here that keeps my drives active. This only stops when unmounting > the filesystem. There are no logged writes/reads to the md devices itself at the same time. > > I'm currently running Kernel 4.9.0-11 > > /dev/md127: > Version : 1.2 > Creation Time : Sat Dec 21 22:20:21 2019 > Raid Level : raid5 > Array Size : 19534553088 (18629.60 GiB 20003.38 GB) > Used Dev Size : 4883638272 (4657.40 GiB 5000.85 GB) > Raid Devices : 5 > Total Devices : 5 > Persistence : Superblock is persistent > > Intent Bitmap : Internal > > Update Time : Mon Dec 30 03:31:26 2019 > State : clean > Active Devices : 5 > Working Devices : 5 > Failed Devices : 0 > Spare Devices : 0 > > Layout : left-symmetric > Chunk Size : 512K > > Name : mediapc:myraid5 (local to host mediapc) > UUID : 386efd19:1cc165f6:937ac197:810a3afa > Events : 68301 > > Number Major Minor RaidDevice State > 0 8 113 0 active sync /dev/sdh1 > 1 8 97 1 active sync /dev/sdg1 > 3 8 1 2 active sync /dev/sda1 > 5 8 17 3 active sync /dev/sdb1 > 4 8 33 4 active sync /dev/sdc1 > > Thanks, > Norbert >
