On Fri, Jul 20, 2012 at 09:16:13PM +0100, Jeremy Henty wrote: > > Can I be sure that GRUB2's hd0, hd1 etc. will always correspond to the > same physical SATA connectors on the motherboard, no matter what > hardware I plug in? (I know from experience that /dev/sda does not > always map to the same connector.) If not, how can I find out the > mapping after booting from a live CD? Or can I drop into the BIOS and > asssume that it lists the drives in hd0, hd1 ... order? > I was going to reply to Bruce's reply, noting that over the years I've seen drives move around across kernel versions. Then I realised that you were really talking about grub (so, whichever drive is /dev/sda as far as the kernel is concerned has little or no correspondence with what grub thinks).
If you have to boot to a live CD to fix things up, I would run grub-mkdevicemap to see what it reports. Of course, if you have to reinstall grub, you install it to /dev/sda or wherever, using what the current kernel thinks the drives are called [ see dmesg ]. Personally, I would never trust a BIOS writer to do things correctly, nor a manufacturer of affordable motherboards to do things straightforwardly - on one of my current boxes, the connector where I happened to connect the DVD drive uses a different SATA driver from the other connectors ;) For the non-root filesystems, in /etc/fstab I use LABEL= [ man e2label - not sure if that would work with btrfs or xfs ]. ĸen -- das eine Mal als Tragödie, das andere Mal als Farce -- http://linuxfromscratch.org/mailman/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/lfs/faq.html Unsubscribe: See the above information page
