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Redhat 7.3, raid1 and grub almost there...


From: Tony Lindstrom
Subject: Redhat 7.3, raid1 and grub almost there...
Date: 02 Nov 2002 12:12:42 +0200

After googling around a lot I decided to join this list and ask for some
advice to make this thing perfect.

My configuration is now:

Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/md1               1032056    124088    855536  13% /
/dev/md0                127231     13607    107055  12% /boot
/dev/md2                507685      8288    473170   2% /tmp
/dev/md3                507685      8244    473214   2% /home
/dev/md4               5160416    849204   4049064  18% /usr
/dev/md5               5160416     32916   5022640   1% /usr/local
/dev/md6               5160416     89452   4966104   2% /var
none                    256956         0    256956   0% /dev/shm

Where I have two 40 GB disks partitioned as hda(1-15) and hdc(1-15). 
md0 (/boot) is raid1 on /dev/hda1 and /dev/hdc1 md1 (/) is raid1 on
/dev/hda2 and /dev/hdc2.

I first installed the 7.3 from scratch on a normal ext3fs (now unused)
partition /dev/hda14, installed grub and made it boot from there. This
worked of course well. I fdisk:ed hdc to have the right types (fd) for
raid on the needed partitions and copied everything to /dev/hdc14.
Reinstalled grub to use grub.conf from the /dev/hdc14 and booted from
there. Worked well. fdisked hda to have the fd:s.. Then I created the
above raid1 partitions and configured grub.conf on the /dev/hdc14 to
boot from them. This also worked well as you see above.

So the last thing I wanted to do was to install grub to use the
grub.conf from /dev/md0. But....

grub-install will not work, because it doesn't know about md-devices,
but I thought it should have been possible to make this work by
installing it manually from the grub-command line. However I can't seem
to make it working. 

What I did try was this:

grub> device (hd0) /dev/hda

grub> root (hd0,0)
 Filesystem type is ext2fs, partition type 0xfd

        So far so good, then:

grub> install /boot/grub/stage1 (hd0,0) /boot/grub/stage2 0x8000 
(hd0,0)/boot/grub/menu.lst

Error 15: File not found

        Why can't it find it? Tried to find the available /boot/grub/stage1 by:

grub> find /boot/grub/stage1
 (hd0,13)
 (hd1,13)

        Yes, no stage1 on (hd0,0)...:-(

        Something I overlooked?



-- 
http://www.iki.fi/tonyk
NO PROBLEMS. THANK YOU FOR FLYING AMERICAN 
                PRIDE.





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