Hi All,
I have a problem replacing a failed disk with a LVM volume on a RAID1 array.
Normally in the past when a disk has failed, I have dropped the offending disk
from the array, replaced the disk, booted, rebuilt the filesystem on the new
disk and re-synced the array. I've done this about four times with this method.
However, I recently upgraded from Etch to Lenny. This week, I had a degraded
array warning; a disk is failing.
So. I duly repeated the steps to replace the disk but on booting with the new
unformatted disk, I get the following error:
"Alert! dev/mapper/vg00-lv01 does not exist ...
...Dropping to shell"
At the moment, I have had to reinstall the old, failing disk in order to be
able to boot and run the system. Has anyone had this problem before? Does
anyone know of any solution to it?
I've included the relevant disk/raid configuration at the end of this email.
The device /dev/sdb is the one that is failing.
Thanks very much,
Matt
--
# cat /etc/fstab
# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
/dev/mapper/vg00-lv01 / ext3 defaults,errors=remount-ro 0
1
/dev/md0 /boot ext3 defaults 0 2
/dev/mapper/vg00-lv00 none swap sw 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto 0 0
#df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg00-lv01
442G 80G 340G 20% /
tmpfs 1.7G 0 1.7G 0% /lib/init/rw
udev 10M 720K 9.3M 8% /dev
tmpfs 1.7G 0 1.7G 0% /dev/shm
/dev/md0 942M 46M 849M 6% /boot
# cat /proc/mdstat
Personalities : [raid1]
md1 : active raid1 sda2[0]
478512000 blocks [2/1] [U_]
md0 : active raid1 sda1[0]
979840 blocks [2/1] [U_]
# lvdisplay /dev/mapper/vg00-lv01
--- Logical volume ---
LV Name /dev/vg00/lv01
VG Name vg00
LV UUID tvzjKH-hSpH-sDYk-YlWY-osUY-VxrA-ka2UCW
LV Write Access read/write
LV Status available
# open 1
LV Size 448.34 GB
Current LE 114776
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
The next one is swap space:
# lvdisplay /dev/mapper/vg00-lv00
--- Logical volume ---
LV Name /dev/vg00/lv00
VG Name vg00
LV UUID aosfiq-oBUr-70Xn-Y5OJ-lsSV-i59V-nTXJG6
LV Write Access read/write
LV Status available
# open 2
LV Size 8.00 GB
Current LE 2048
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
# fdisk -l
Disk /dev/sda: 750.1 GB, 750156374016 bytes
255 heads, 63 sectors/track, 91201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sda1 * 1 122 979933+ fd Linux raid autodetect
/dev/sda2 123 59694 478512090 fd Linux raid autodetect
Disk /dev/sdb: 750.1 GB, 750156374016 bytes
255 heads, 63 sectors/track, 91201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 122 979933+ fd Linux raid autodetect
/dev/sdb2 123 59694 478512090 fd Linux raid autodetect
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