HOWTO: Linux Software Raid using mdadm

[Tom_T]

Still not got anywhere with this..
Anyone will to help a bit ?

I've run a couple of Raid scanning apps and they are showing my data, so there is some hope.
I just need to find a way to get at it..

DiskInternal Raid Recovery seems to show my data, but that costs £299.00
A lot of money for a home user..

can anyone help ?

Thanks

[rickyrockrat]

This is from my personal notes (your disks and devices will be different):
mdadm --examine --scan /dev/sda1 /dev/sda2 >> /etc/mdadm.conf
The lines in the mdadm.conf file should look like this:
ARRAY /dev/md0 level=raid1 num-devices=3 UUID=e03a952e:5ed1a43c:c79e3f2b:927be822

Use mdadm /dev/md0 --add /dev/sdc1 to add
If you have an existing software raid, you may have to create a new md:
MAKEDEV md4
mdadm -C /dev/md4 -l 1 -n 2 missing /dev/sdb1
if you have an existing disk that *was* on USB and put it in PATA, you may have
a device node that is incorrect. This will have mdadm saying "device is too small".
Fix it by deleting the device and making the new node:
mknod /dev/sdb1 b 8 18
but make sure the minor (last no) doesn't conflict.

Your md and devices are, apparently
/dev/sdb2 is md0
/dev/sdb4 is md1
/dev/sdb6 is md3

[Tom_T]

The disk is an XFS disk
http://en.wikipedia.org/wiki/XFS

Using either

NAS Data Recovery
http://www.runtime.org/nas-recovery.htm

or
Raise Data Recovery for XFS 5.8
http://www.softpedia.com/get/System/...-for-XFS.shtml

I can see my data.. Raise is only around £20.00 for a licence.
So that seems to be the way to go.

Hope this helps someone else.

[rickyrockrat]

XFS is in the Linux kernel - I just checked CONFIG_XFS_FS is in the kernel config file, so if you have a Linux system you should be able to read those raid systems.