On Wed, May 13, 2009 at 01:11:43PM +0800, Uwe Dippel wrote: > Beautyful, as it looks like! > > I tried here on 2 300 GB U320, and the setup went through without any > warnings (?? most users encounter some?). > What I did was: (my system disk is sd0) > > fdisk -iy sd1 > fdisk -iy sd2 > > printf "a\n\n\n\nRAID\nw\nq\n\n" | disklabel -E sd1 > printf "a\n\n\n\nRAID\nw\nq\n\n" | disklabel -E sd2 > > bioctl -c 1 -l /dev/sd1a,/dev/sd2a softraid0 > > dd if=/dev/zero of=/dev/rsd3c bs=1m count=1 > disklabel sd3 (creating my partitions/slices) > > newfs /dev/rsd3a > newfs /dev/rsd3b > > mount /dev/sd3b /mnt/ > cd /mnt/ > [pull one hot-swap out]
If I were to try this (search the archives, it has been discussed recently what and how to restore a broken mirror), here is when I would search very hard for error indications. Does not really bioctl say nothing? Try "bioctl sd3" "bioctl softraid0", "bioctl -q sd3", "bioclt -q softraid0". > echo Nonsense > testo > [push the disk back in] That pushed in disk is most probably still regarded by softraid as broken. The feature of now starting a rebuild using "bioctl -R sd2" is missing in softraid. The existing repair option as I recall it (again, search the archives) is to backup the still working filesystems sd3a and sd3b on the broken mirror, re-create the array from scratch, and restore them. > [pull the other disk] That sounds fatal. You should repair the RAID mirror, not break the working half. Now both mirror halves are probably regarded as broken. Your RAID is doomed. > # ls -l > total 4 > -rw-r--r-- 1 root wheel 9 May 13 12:00 testo > [everything okay until here] > # rm testo > > rm: testo: Input/output error > [I still guess this may happen] > > But now my question: All posts say all info is in 'man softraid' and > 'man bioctl'. There is nothing about *warnings* in there. I also tried > bioctl -a/-q, but none would indicate that anything was wrong when one > of the drives was pulled. > > This will be a production server, but it can take downtime, in case. > However: > 1. I *need to know* when a disk goes offline > 2. I need to know, in real life(!), if I can simply use the broken > mirror to save my data; how I can mount it in another machine. Alas, > softraid and bioctl are silent about these two. > > Another reason for asking: > Next I issued 'reboot'; and could play hangman :( > > After the reboot, I got: > ... > softraid0 at root > softraid0: sd3 was not shutdown properly > scsibus3 at softraid0: 1 targets, initiator 1 > sd3 at scsibus3 targ 0 lun 0: <OPENBSD, SR RAID 1, 003> SCSI2 0/direct fixed > sd3: 286094MB, 36471 cyl, 255 head, 63 sec, 512 bytes/sec, 585922538 sec > total > > Now I wonder what to do. Will a traditional fsck do, or do I have to > recreate the softraid? > > Can anyone please help me further? > > Uwe -- / Raimo Niskanen, Erlang/OTP, Ericsson AB
