(sorry, prev post missed the list) Neil Brown wrote: > On Monday April 24, anssi.hannula@xxxxxxxxx wrote: > >># mdadm --grow /dev/md_d1 --raid-devices=3 --backup-file backupfile >>mdadm: Need to backup 128K of critical section.. >>mdadm: /dev/md_d1: Cannot get array details from sysfs >> >>Strace shows that it's trying to access >>"/sys/block/md_d4/md/component_size". >> >>Why is this? > > > Because I didn't test my code properly :-( > > Following patch should fix it. Okay, will test. > Re: the recovery speed problem: I would try dding from one drive to > the other and see what sort of speed you get then: > dd if=/dev/sda of=/dev/sdb bs=1024k count=1000 > or something like that. # export LANGUAGE=C; export LANG=C; export LC_ALL=C; date; dd if=/dev/sda skip=20000 of=/dev/sdb bs=1024k count=1000; date Mon Apr 24 01:14:48 EEST 2006 1000+0 records in 1000+0 records out Mon Apr 24 01:15:42 EEST 2006 So the speed is about 20MB/s. -- Anssi Hannula - 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
