Dan,
On Sat, 4 Nov 2000, Dan Browning wrote:
> '/' mounted on RAID-5
IIRC, lilo cannot deal with RAID-5 partitions at boot time - only RAID-1
(and maybe RAID-0?)
> * When booting with newly created '/dev/md0' as '/', it is reported
> corrupt and needs a manual fsck
> * The manual fsck reports millions (almost) of:
> inode 12156 is in use, but has dtime set. Fix?
> inode 12156 has imagic flag set, clear?
> ...
> And various other sundry errors.
> * After fsck'ing it (holding the enter key down for an hour), and
I'm guessing that this is because it is treating one disc of the RAID-5
array as a horribly broken ext2 partition. Fixing these errors completely
trashes the RAID-5 array.
> - mkraid /dev/md0
> - mke2fs -b 4096 -R stride=8 /dev/md0
> - init 1
I've never tried it like this - does the raid5syncd thread continue
running OK when you take it down to runlevel one?
> - cp -xa / /mnt/md0
> (During the cp I get a bunch of errors like the following:)
> "EXT2-fs error (device md(9,0)): ext2_new_block: Allocating block in
> system zone - block = 416"
> "EXT2-fs error (device md(9,0)): ext2_free_blocks: freeing blocks in
> system zones - Block = 419, count = 5"
These may be harmless, but I haven't seen them before. Maybe try waiting
for raid5syncd to finish syncing the array before mke2fs and cp.
> - cp finishes. So I edit the /mnt/md0/etc/fstab and set
> "/dev/md0 / ext2 defaults 1 1"
> - then I edit /mnt/md0/etc/lilo.conf to set:
> image=/boot/vmlinuz-2.4.0-test10
> label=2.4.0-t10md0
> read-only
> root=/dev/md0
Are you also setting boot=/dev/md0? This installs the boot block in the
MBR of each disk which is part of the array.
> - '/sbin/lilo -v' runs fine
You are doing 'lilo -r /mnt/md0', aren't you? Just running lilo will use
/etc/lilo.conf instead of /mnt/md0/etc/lilo.conf.
This is what I do:
mkraid /dev/md0
/* wait for raid5syncd to complete */
mke2fs -b 4096 -R stride=8 /dev/md0
mount /mnt/md0
find / -mount -print | cpio -pm /mnt/md0
cd /mnt/md0
vi etc/lilo.conf
/* change 'boot' and 'root' lines to '/dev/md0' */
vi etc/fstab
/* change root fs to '/dev/md0' */
vi etc/mtab
/* change root fs to '/dev/md0', delete all other lines */
lilo -r .
/* run lilo, treating '/mnt/md0' as the root */
reboot
> * Two are on the Intel i815 Mobo (onboard LAN / vid)
Just out of interest, is this the D815EEA? What do you think of it, and
the Solano2 Chipset?
> * Two are on the Promise Ultra66 controller (2.00b18 firmware) <--
> that's why I use the ide patches when using 2.2.17
> * raidtools-.90-13.rpm (plus .90 in the kernel)
Shouldn't be a problem with this. Give the above a try, and see if it
helps...
Corin
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