Nicolas Kovacs wrote:
>
> My workstation is running CentOS 7 on two disks (sda and sdb) in a
> software RAID 1 setup.
>
> It looks like I accidentally nuked it. I wanted to write an installation
> ISO file to a USB disk, and instead of typing dd if=install.iso
> of=/dev/sdc I typed /dev/sdb. As soon as I hit <Enter>, the screen froze.
>
> I tried a hard reset, but of course, the boot process would stop short
> very early in the process.
>
> Now, I have backups of the important stuff of course, so no real
> catastrophe. But it would be nice if I could get back the data from my disk
> directly.
>
> I booted a rescue disk (Slax 9.6.4) and I can see my disks as well as
> raid arrays /dev/md125, /dev/md126 and /dev/md127. Oh, my partitioning
> scheme is manual and quite simple. Everything is RAID 1, I have a /boot
> array on /dev/sda1 + /dev/sdb1, swap on /dev/sda2 + /dev/sdb2 and / on
> /dev/sda3 + /dev/sdb3.
>
>
> I tried to mount /dev/sda3 directly from the rescue disk:
>
>
> # mount /dev/sda3 /mnt
>
>
> But I only get this:
>
>
> mount: unknown filesystem type 'linux_raid_member'
>
>
> I'd be very grateful for suggestions.
>
Condolences.
I think how I'd go about it would be to boot off a rescue disk, then
either try to mount the raid, or just edit the /etc/mdadm.conf, and tell
it only sda, and maybe sdb marked as failed. Then see if you can mount the
raid.
mark