I built a RAID5 array with 4 2Tb devices a few month ago.
- I used LVM2 to build partitions.
- I also used GRUB2.
- Finally I installed Debian.
For an unknown reason the RAID failed. The BIOS "see" only two devices.
I am aware that my RAID is lost.
For the two failed devices smart tool return nothing.
1) with the reduced RAID array:
- is it possible to retrieve logical volumes and backup them ?
- is it possible to separate them, I mean to have two devices and not one RAID of two devices, and retrieve data ?
2) When I try to boot with the two good devices, grub rescue takes the control.
The ls command gives:
(hd0) (hd0,msdos1) (hd1) (hd1,msdos1) (md/0)
ls .../boot gives unknown filesystem
ls (md/0) gives error disk 'md/0' not found.
3) I boot an old device and install on it the HDDsupertool application. This application detects the failed disk by the command: hddsupertool -d
ata1 - cff0 cf7e cfa0 1 wdc2003FYYS-02w0b1
But this application is complicate and I don't know if I could retrieve data.
Any ideas I could retrieve data or repair RAID ...