On Monday May 22, florian.dazinger@xxxxxxx wrote: > hi list, > I read somewhere that it would be better not to rely on the > autodetect-mechanism in the kernel at boot time, but rather to set up > /etc/mdadm.conf accordingly and boot with raid=noautodetect. Well, I > tried that :) > > I set up /etc/mdadm.conf for my 2 raid5 arrays: > > ---- snip ---- > # mountpoint: /home/media > ARRAY /dev/md0 > level=raid5 > UUID=86ed1434:43380717:4abf124e:970d843a > devices=/dev/sda1,/dev/sdb1,/dev/sdd3 > > # mountpoint: /mnt/raid > ARRAY /dev/md1 > level=raid5 > UUID=baf59fb5:f4805e7a:91a77644:af3dde17 > # devices=/dev/sda2,/dev/sdb2,/dev/sdd2 > ---- snap ---- Presumably you have a 'DEVICE' line in mdadm.conf too? What is it. My first guess is that it isn't listing /dev/sdd? somehow. Otherwise, can you add a '-v' to the mdadm command that assembles the array, and capture the output. That might be helpful. NeilBrown > > and rebooted with raid=noautodetect. It booted fine, but the 3rd disks > from each array (/dev/sdd2 and /dev/sdd3) were removed, so I had 2 > degraded raid5 arrays. It was possible to readd them with sth. like: > > mdadm /dev/md0 -a /dev/sdd3 > (synced and /proc/mdstat showed [UUU]) > > but after the next reboot, the two partitions were again removed > ([UU_])?! This was a reproducible error, I tried it several times with > different /etc/mdadm.conf settings (ARRAY-statement with UUID=, > devices=, UUID+devices, etc.). > > I´m now running autodetect again, all raid arrays are working fine, but > can anyone explain this strange behaviour? > (kernel-2.6.16.14, amd64) > > thanks, > florian > > PS: please cc me, as I´m not subscribed to the list > - > 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
