Hi,
I'm moving my system partitions from an old IDE disk to a RAID1 made
of two disks. The RAID1 has been created directly on the physical
disks (/dev/sda and /dev/sdb). The RAID1 is partitioned as follows:
Device Boot Start End Blocks Id System
/dev/md127p1 257 16777472 67108864 82 Linux swap / Solaris
/dev/md127p2 16777473 17301760 2097152 83 Linux
/dev/md127p3 17301761 43516160 104857600 83 Linux
/dev/md127p4 43516161 122096356 314320784 5 Extended
/dev/md127p5 43516417 69730816 104857600 83 Linux
/dev/md127p6 69731073 95945472 104857600 83 Linux
/dev/md127p7 95945729 122096356 104602511+ 83 Linux
Some of the partitions on the RAID1 are already in use:
/dev/md127p1 (swap)
/dev/md127p3 /usr
/dev/md127p5 /var
/dev/md127p6 /opt
/dev/md127p7 /tmp
Now /dev/md127p2 is supposed to become the new root partition (I
forgot to set the "bootable" flag for that partition.). But
'grub-install /dev/md127p2' gives me an error message:
/usr/sbin/grub-setup: error: can't open /dev/md/127: No such file or
directory.
The md devices show up under /dev, /dev/md is emtpy. Now how do I
install grub on the RAID1 to be able to boot from it, with
/dev/md127p2 being the root partition?
If I use
grub-install /dev/sda /dev/sdb
(how) does grub-install figure out that the root partition is
/dev/md127p2? Would that work at all or destroy the RAID1 by
overwriting data directly on the physical disks?
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