Hi,
my goal is to substitute two mirrored IDE disks, 160GB each, for 2x 500GB SATA drives - keeping the /dev/md0 layout for rootfs (Suse 10.1) and /dev/md1 will just have more space.
I’m failing in making the new drives bootable.
(see below:
mdadm: no devices found for /dev/md0.)
Here’s what I did:
Connect the new disks additionally (sda und sdb)
1st is to backup the drive partition tables:
mkdir /raidinfo
sfdisk -d /dev/hda > /raidinfo/partitions.hda
sfdisk -d /dev/hdb > /raidinfo/partitions.hdb
# fdisk -l /dev/hda
Disk /dev/hda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hda1 1 131 1052226 82 Linux swap / Solaris
/dev/hda2 * 132 4048 31463302+ fd Linux raid autodetect
/dev/hda3 4049 19456 123764760 fd Linux raid autodetect
(hdb is identical to hda)
With “fdisk”:
- create sda1 and sdb1 (swap)
- create sda2 and sdb2 (for / type: fd)
- create sda3 and sdb3 (/fileshares type: fd)
- set active partitions sda2 und sdb2.
## fdisk -l /dev/sda
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 1 131 1052226 82 Linux swap / Solaris
/dev/sda2 * 132 4048 31463302+ fd Linux raid autodetect
/dev/sda3 4049 60801 455868472+ fd Linux raid autodetect
(sdb is identical to sda)
Create both new RAID:
mdadm --create /dev/md2 --level=1 --raid-devices=2 /dev/sda2 /dev/sdb2
mdadm --create /dev/md3 --level=1 --raid-devices=2 /dev/sda3 /dev/sdb3
watch cat /proc/mdstat ## Just to check progress.
mkfs.reiserfs /dev/md2 ## Format can be started
mkfs.reiserfs /dev/md3 ## during creation of array.
mkdir /mnt/md2
mkdir /mnt/md3
mcedit /etc/fstab (add md2 + md3 lines)
/dev/md0 / reiserfs acl,user_xattr 1 1
/dev/md1 /fileshares reiserfs acl,user_xattr 1 1
/dev/md2 /mnt/md2 reiserfs acl,user_xattr 1 1
/dev/md3 /mnt/md3 reiserfs acl,user_xattr 1 1
/dev/hda1 swap swap defaults 0 0
/dev/hdb1 swap swap defaults 0 0
Mount new Arrays:
mount /dev/md2 /mnt/md2 -o acl -o user_xattr
mount /dev/md3 /mnt/md3 -o acl -o user_xattr
rsync copies also ACLs:
rsync -v --recursive --times --perms --links --exclude "/mnt/" --exclude \
"/proc/" --exclude "/fileshares/" --exclude "/sys/" -a /* /mnt/md2/
cd /mnt/md2/ %% mkdir mnt %% mkdir proc %% mkdir fileshares %% mkdir sys
Copy Data partition:
rsync -v --recursive --times --perms --links -a /fileshares/* /mnt/md3/
Set new UUIDs in new mdadm.conf:
mdadm --detail --scan >> /mnt/md2/etc/mdadm.conf
Install GRUB onto both new disks:
chroot /mnt/md2
grub
device (hd0) /dev/sda
root (hd0,1) ## 0,0 = swap, 0,1 = / incl /boot
setup (hd0)
device (hd1) /dev/sdb
root (hd1,1) ## 1,0 = swap, 1,1 = / incl /boot
setup (hd1)
quit
mcedit /mnt/md2/etc/fstab
/dev/md0 / reiserfs acl,user_xattr 1 1
/dev/md1 /fileshares reiserfs acl,user_xattr 1 1
/dev/sda1 swap swap defaults 0 0
/dev/sdb1 swap swap defaults 0 0
mcedit /mnt/md2/boot/grub/device.map
(hd0) /dev/sda
(hd1) /dev/sdb
mcedit /mnt/md2/boot/grub/menu.lst
###Don't change this comment - YaST2 identifier: Original name: linux###
title SUSE Linux 10.1
root (hd0,1)
kernel /boot/vmlinuz root=/dev/md0 vga=0x31a resume=/dev/sda1 splash=silent showopts
initrd /boot/initrd
poweroff
Remove hda and hdb.
Boot from new hard disks:
...
Loading raid1
md: personality registered for level 1
Loading reiserfs
md: md0 stopped.
mdadm: no devices found for /dev/md0.
resume /dev/sda1 not founf (ignoring)
md: md0 stopped.
mdadm: no devices found for /dev/md0.
md: md1 stopped.
mdadm: no devices found for /dev/md1.
Waiting for device /dev/md0 to appear: ok.
rootfs: major=9 minor=0 devn=2304
/dev/md0: unknown volume type
invalid root filesystem -- exiting to /bin/sh
$_
Any suggestions will be appreciated!
One thing that might be the problem :\ is that I swapped the SATA cables from sda and sdb by mistake:
# mdadm --detail /dev/md2
/dev/md2:
Version : 00.90.03
Creation Time : Sat Oct 4 02:38:41 2008
Raid Level : raid1
Array Size : 31463232 (30.01 GiB 32.22 GB)
Device Size : 31463232 (30.01 GiB 32.22 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 2
Persistence : Superblock is persistent
Update Time : Sun Oct 12 21:24:25 2008
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
UUID : ba1944d9:4539b5bb:0fa8b8d3:3798154c
Events : 0.1722
Number Major Minor RaidDevice State
0 8 18 0 active sync /dev/sdb2
1 8 2 1 active sync /dev/sda2
If that’s the whole problem, how can I fix it now that the users are already writing stuff on /dev/md3 (mounted on: /fileshares)?