On Tue, Feb 1, 2011 at 9:31 PM, tv.deb...@googlemail.com
<tv.deb...@googlemail.com> wrote:
>
> Regarding "sfdisk -d", if you ran this command with a filesystem already
> on the source drive you'll run into problems due to the filesystem
> boundaries being misplaced.
>
Thanks for the reply but I did not get it full :-(
The source drive was /dev/sda It is a running RAID1 partition.
I connected sdb and did
#sfdisk -d /dev/sda | sfdisk -f /dev/sdb
to create identical partitions on sdb and then added it to the RAID device by
#mdadm -a /dev/md0 /dev/sdb1
#mdadm -a /dev/md1 /dev/sdb2
#mdadm -a /dev/md2 /dev/sdb3
#mdadm -a /dev/md3 /dev/sdb4
and the RAID devices now look like
root@vmsrv:~# cat /proc/mdstat
Personalities : [raid1]
md3 : active raid1 sdb4[2] sda4[0]
470514552 blocks super 1.2 [2/2] [UU]
md2 : active raid1 sdb3[2] sda3[0]
16599992 blocks super 1.2 [2/2] [UU]
md1 : active raid1 sdb2[2] sda2[0]
976884 blocks super 1.2 [2/2] [UU]
md0 : active raid1 sdb1[2] sda1[0]
291828 blocks super 1.2 [2/2] [UU]
unused devices: <none>
root@vmsrv:~#
'parted -l' looks like
=========
Model: ATA ST3500418AS (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 1049kB 300MB 299MB primary raid
2 300MB 1300MB 1000MB primary raid
3 1300MB 18.3GB 17.0GB primary raid
4 18.3GB 500GB 482GB primary raid
Model: ATA ST3500418AS (scsi)
Disk /dev/sdb: 500GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 1049kB 300MB 299MB primary raid
2 300MB 1300MB 1000MB primary raid
3 1300MB 18.3GB 17.0GB primary raid
4 18.3GB 500GB 482GB primary raid
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/vg0-backup: 53.7GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 53.7GB 53.7GB jfs
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/vg0-lxc: 107GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 107GB 107GB jfs
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/vg0-vms: 116GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 116GB 116GB jfs
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/vg0-var: 5000MB
Sector size (logical/physical): 512B/512B
>Partition Table: loop
Number Start End Size File system Flags
1 0.00B 5000MB 5000MB jfs
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/vg0-usr: 1996MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 1996MB 1996MB jfs
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/vg0-tmp: 96.5MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 96.5MB 96.5MB jfs
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/vg0-home: 96.5MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 96.5MB 96.5MB jfs
Model: Linux Software RAID Array (md)
Disk /dev/md0: 299MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 299MB 299MB ext3
Model: Linux Software RAID Array (md)
Disk /dev/md1: 1000MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 1000MB 1000MB ext3
Model: Linux Software RAID Array (md)
Disk /dev/md2: 17.0GB
Sector size (logical/physical): 512B/512B
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 1996MB 1996MB jfs
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/vg0-tmp: 96.5MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 96.5MB 96.5MB jfs
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/vg0-home: 96.5MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 96.5MB 96.5MB jfs
Model: Linux Software RAID Array (md)
Disk /dev/md0: 299MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 299MB 299MB ext3
Model: Linux Software RAID Array (md)
Disk /dev/md1: 1000MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 1000MB 1000MB ext3
Model: Linux Software RAID Array (md)
Disk /dev/md2: 17.0GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 17.0GB 17.0GB linux-swap(v1)
Error: /dev/md3: unrecognised disk label
root@vmsrv:~#
Is this dangerous?
Thanks
--Siju
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