Up please :-(
Le Thu, 24 Apr 2014 07:05:48 +0200,
"L.M.J" <linuxmasterjedi@xxxxxxx> a écrit :
> Hi,
>
> For the third time, I had to change a failed drive from my home linux RAID5 box. Previous one went right and
> this time, I don't know what I did wrong, but I broke my RAID5. Well, at least, he didn't want to
> start. /dev/sdb was the failed drive /dev/sdc and /dev/sdd are OK.
>
> I tried to reassemble the RAID with this command after I replace sdb and create a new partition :
>
> ~# mdadm -Cv /dev/md0 --assume-clean --level=5 --raid-devices=3 /dev/sdc1 /dev/sdd1 /dev/sdb1
> -> '-C' was not a good idea here
>
> Well, I guess I did an another mistake here, I should have done this instead :
> ~# mdadm -Av /dev/md0 --assume-clean --level=5 --raid-devices=3 /dev/sdc1 /dev/sdd1 missing
>
> Maybe this wipe out my data...
> Let's go futher, then, pvdisplay, pvscan, vgdisplay returns empty information
>
> Google helped me, and I did this :
> ~# dd if=/dev/md0 bs=512 count=255 skip=1 of=/tmp/md0.txt
>
> [..]
> physical_volumes {
> pv0 {
> id = "5DZit9-6o5V-a1vu-1D1q-fnc0-syEj-kVwAnW"
> device = "/dev/md0"
> status = ["ALLOCATABLE"]
> flags = []
> dev_size = 7814047360
> pe_start = 384
> pe_count = 953863
> }
> }
> logical_volumes {
>
> lvdata {
> id = "JiwAjc-qkvI-58Ru-RO8n-r63Z-ll3E-SJazO7"
> status = ["READ", "WRITE", "VISIBLE"]
> flags = []
> segment_count = 1
> [..]
>
> Since I saw lvm information, I guess I haven't lost all information yet...
>
> I tried an unhoped command :
> ~# pvcreate --uuid "5DZit9-6o5V-a1vu-1D1q-fnc0-syEj-kVwAnW"
> --restorefile /etc/lvm/archive/lvm-raid_00302.vg /dev/md0 Then,
>
> ~# vgcfgrestore lvm-raid
>
> ~# lvs -a -o +devices
> LV VG Attr LSize Origin Snap% Move Log Copy% Convert Devices
> lvdata lvm-raid -wi-a- 450,00g /dev/md0(148480)
> lvmp lvm-raid -wi-a- 80,00g /dev/md0(263680)
> Then :
> ~# lvchange -ay /dev/lvm-raid/lv*
>
> I was quite happy until now.
> Problem appears now when I try to mount those 2 LV (lvdata & lvmp) as ext4 partition :
> ~# mount /home/foo/RAID_mp/
>
> ~# mount | grep -i mp
> /dev/mapper/lvm--raid-lvmp on /home/foo/RAID_mp type ext4 (rw)
>
> ~# df -h /home/foo/RAID_mp
> Filesystem Size Used Avail Use% Mounted on
> /dev/mapper/lvm--raid-lvmp 79G 61G 19G 77% /home/foo/RAID_mp
>
> Here is the big problem
> ~# ls -la /home/foo/RAID_mp
> total 0
>
> I did a LVM R/W snapshot on the /dev/mapper/lvm--raid-lvmp LV, I fsck it. I recover 50% of the files only,
> all located in lost-+found/ directory with names heading with #xxxxx.
>
> I would like to know if there is a last chance to recover my data ?
>
> Thanks
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