Mounting existing RAID from LiveCD?

Arainach · l33t Joined: 08 Jul 2004 Posts: 609

I've got Gentoo 2004.3 installed on a SATA RAID0. It installed fine, booted from GRUB fine, everything. However, when going through the LTSP guide, I apparently misconfigured my tftp service because when booting to Gentoo, it gets so far and then freezes on "Starting in.tftpd....". I'm currently booted to the Gentoo LiveCD; I've modprobed sata-via, md, and raid0. I've re-created /etc/raidtab. But "mount /dev/md0 /mnt/gentoo" isn't working. I get a "/dev/md0: Invalid argument; mount:/dev/md0: can't read superblock" Any tips?

adaptr · Posted: Sun Dec 19, 2004 10:05 pm Post subject:

If either the software RAID versions or the filesystem versions are not exactly the same you are more than likely to get into trouble...

You say you have re-created the raidtab, but did you create the array with a persistent superblock ?

If not, it's safe to say that mounting it with another kernel will fail.
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>>> emerge (3 of 7) mcse/70-293 to /
Essential tools: gentoolkit eix profuse screen

Arainach · l33t Joined: 08 Jul 2004 Posts: 609

I'm currently booted into the same LiveCD (and thus the same kernel) that the RAID was originally created in; also, when I created it, persistent-superblock was set to 1 in my /etc/raidtab, although I used "mdadm --create --verbose /dev/md0 --level=0 --raid-devices=2 /dev/sda3 /dev/sdb3" to create the RAID.

Are there any options I can pass to the kernel from GRUB to make it not initialize the script? Would single-user mode fix my problem? Is changing the runlevel down to 2 possible from GRUB?

EDIT: I removed in.tftpd in single user mode. I wish I had thought of that earlier. Thanks for trying to help, though.