Software RAID1 On A Running System (Ubuntu 10.10)

[kimlee]

Hello,

I have two disks sda (contains the system) sdb (nothing), and i want to make a RAID1.
I'd like to know if when i use fdisk on my sdB device, i also have to change the sda2 type into fd Linux raid autodetect?

my disk repartition :

sda1 /
sda2 (extended partition)
sda5 swap

Thanks,

[falko]

You can use one of these tutorials:

If you have an LVM system: http://www.howtoforge.com/how-to-set...n-ubuntu-10.04

Otherwise: http://www.howtoforge.com/how-to-set...n-ubuntu-10.04

[alex2323]

hi, I have 2 disks sda and sdb too, and sda disk does't have /boot partitiion, only /

It is possible to create raid array without creating /boot partition?

Thanks

[falko]

Yes, but you can't use LVM then.

[alex2323]

ok, my current server 10.04 running without LVM. And I can't use second tuturial.

I just created
/dev/md1 for /dev/sda1 (root) and
/dev/md5 for /dev/sda5 (swap)

I update files fstab, mtab... like in tuturial, but when I reboot server, server does't boot up. Line like "/dev/fd0 cannot mount" or some thing appeared.

How can I apply second tutorial for my server? Thanks.

[falko]

So you used this tutorial? http://www.howtoforge.com/how-to-set...n-ubuntu-10.04

[alex2323]

yes, I used this one

[alex2323]

here is my messages from ssh client before reboot:




root@ubuntu:/# fdisk -l

Disk /dev/sdb: 251.1 GB, 251059544064 bytes
255 heads, 63 sectors/track, 30522 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000590a0

Device Boot Start End Blocks Id System
/dev/sdb1 * 1 29778 239185920 fd Linux raid autodetect
/dev/sdb2 29778 30523 5987329 5 Extended
/dev/sdb5 29778 30523 5987328 fd Linux raid autodetect

Disk /dev/sda: 251.1 GB, 251059544064 bytes
255 heads, 63 sectors/track, 30522 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000a20ad

Device Boot Start End Blocks Id System
/dev/sda1 * 1 29778 239185920 83 Linux
/dev/sda2 29778 30523 5987329 5 Extended
/dev/sda5 29778 30523 5987328 82 Linux swap / Solaris

Disk /dev/md1: 244.9 GB, 244926316544 bytes
2 heads, 4 sectors/track, 59796464 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/md1 doesn't contain a valid partition table

Disk /dev/md5: 6130 MB, 6130958336 bytes
2 heads, 4 sectors/track, 1496816 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/md5 doesn't contain a valid partition table







root@ubuntu:/# mdadm -D /dev/md1
/dev/md1:
Version : 00.90
Creation Time : Mon May 9 12:49:27 2011
Raid Level : raid1
Array Size : 239185856 (228.11 GiB 244.93 GB)
Used Dev Size : 239185856 (228.11 GiB 244.93 GB)
Raid Devices : 2
Total Devices : 1
Preferred Minor : 1
Persistence : Superblock is persistent

Update Time : Mon May 9 13:00:30 2011
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0

UUID : 63b56a30:4df0a2c6:e368bf24:bd0fce41 (local to host ubuntu)
Events : 0.77

Number Major Minor RaidDevice State
0 0 0 0 removed
1 8 17 1 active sync /dev/sdb1
root@ubuntu:/#



root@ubuntu:/# mdadm -D /dev/md5
/dev/md5:
Version : 00.90
Creation Time : Mon May 9 12:49:39 2011
Raid Level : raid1
Array Size : 5987264 (5.71 GiB 6.13 GB)
Used Dev Size : 5987264 (5.71 GiB 6.13 GB)
Raid Devices : 2
Total Devices : 1
Preferred Minor : 5
Persistence : Superblock is persistent

Update Time : Mon May 9 12:50:51 2011
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0

UUID : f561fe59:059b51ea:e368bf24:bd0fce41 (local to host ubuntu)
Events : 0.3

Number Major Minor RaidDevice State
0 0 0 0 removed
1 8 21 1 active sync /dev/sdb5
root@ubuntu:/#



root@ubuntu:/# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md5 : active raid1 sdb5[1]
5987264 blocks [2/1] [_U]

md1 : active raid1 sdb1[1]
239185856 blocks [2/1] [_U]

unused devices: <none>
root@ubuntu:/#



root@ubuntu:/# cat /etc/mdadm/mdadm.conf
# mdadm.conf
#
# Please refer to mdadm.conf(5) for information about this file.
#

# by default, scan all partitions (/proc/partitions) for MD superblocks.
# alternatively, specify devices to scan, using wildcards if desired.
DEVICE partitions

# auto-create devices with Debian standard permissions
CREATE owner=root group=disk mode=0660 auto=yes

# automatically tag new arrays as belonging to the local system
HOMEHOST <system>

# instruct the monitoring daemon where to send mail alerts
MAILADDR root

# definitions of existing MD arrays

# This file was auto-generated on Mon, 09 May 2011 12:42:04 +0800
# by mkconf $Id$
ARRAY /dev/md1 level=raid1 num-devices=2 UUID=63b56a30:4df0a2c6:e368bf24:bd0fce41
ARRAY /dev/md5 level=raid1 num-devices=2 UUID=f561fe59:059b51ea:e368bf24:bd0fce41
root@ubuntu:/#



root@ubuntu:/# mount
/dev/md1 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
none on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
none on /dev type devtmpfs (rw,mode=0755)
none on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
none on /dev/shm type tmpfs (rw,nosuid,nodev)
none on /var/run type tmpfs (rw,nosuid,mode=0755)
none on /var/lock type tmpfs (rw,noexec,nosuid,nodev)
none on /lib/init/rw type tmpfs (rw,nosuid,mode=0755)
/dev/md1 on /mnt/md1 type ext4 (rw)



root@ubuntu:/# cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc nodev,noexec,nosuid 0 0
# / was on /dev/sda1 during installation
#UUID=eb2d7178-e0a9-4a19-b6a2-117468b054be / ext4 errors=remount-ro 0 1
/dev/md1 / ext4 errors=remount-ro 0 1
# swap was on /dev/sda5 during installation
#UUID=8a5751a9-f23f-4dfd-9a72-6a48eaa46999 none swap sw 0 0
/dev/md5 none swap sw 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0
root@ubuntu:/#



root@ubuntu:/# cat /etc/mtab
/dev/md1 / ext4 rw,errors=remount-ro 0 0
proc /proc proc rw,noexec,nosuid,nodev 0 0
none /sys sysfs rw,noexec,nosuid,nodev 0 0
none /sys/fs/fuse/connections fusectl rw 0 0
none /sys/kernel/debug debugfs rw 0 0
none /sys/kernel/security securityfs rw 0 0
none /dev devtmpfs rw,mode=0755 0 0
none /dev/pts devpts rw,noexec,nosuid,gid=5,mode=0620 0 0
none /dev/shm tmpfs rw,nosuid,nodev 0 0
none /var/run tmpfs rw,nosuid,mode=0755 0 0
none /var/lock tmpfs rw,noexec,nosuid,nodev 0 0
none /lib/init/rw tmpfs rw,nosuid,mode=0755 0 0
/dev/md1 /mnt/md1 ext4 rw 0 0




root@ubuntu:/# cat /etc/grub.d/09_swraid1_setup
#!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
menuentry 'Ubuntu, with Linux 2.6.32-21-server' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod raid
insmod mdraid
insmod ext2
set root='(md1)'
linux /boot/vmlinuz-2.6.32-21-generic-pae root=/dev/md1 ro quiet
initrd /boot/initrd.img-2.6.32-21-generic-pae
}
root@ubuntu:/#



root@ubuntu:/# cd /boot
root@ubuntu:/boot# ls
abi-2.6.32-21-generic-pae grub memtest86+.bin vmcoreinfo-2.6.32-21-generic-pae
config-2.6.32-21-generic-pae initrd.img-2.6.32-21-generic-pae System.map-2.6.32-21-generic-pae vmlinuz-2.6.32-21-generic-pae
root@ubuntu:/boot#



root@ubuntu:/boot# uname -r
2.6.32-21-generic-pae

[falko]

Device Boot Start End Blocks Id System
/dev/sdb1 * 1 29778 239185920 fd Linux raid autodetect
/dev/sdb2 29778 30523 5987329 5 Extended
/dev/sdb5 29778 30523 5987328 fd Linux raid autodetect

Disk /dev/sda: 251.1 GB, 251059544064 bytes
255 heads, 63 sectors/track, 30522 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000a20ad

Device Boot Start End Blocks Id System
/dev/sda1 * 1 29778 239185920 83 Linux
/dev/sda2 29778 30523 5987329 5 Extended
/dev/sda5 29778 30523 5987328 82 Linux swap / Solaris

/dev/sda5 has the wrong file system type! Must be Linux raid autodetect.

[alex2323]

hmm.. in your tutorial exist fdisk command for /dev/sdb, how /dev/sda can become autodetect before first reboot?