Re: Woody, initrd, raid1, boot

[Scott Bisker <scott@bisker.com>]

What you need to do is recreate your initrd to include the modules you
need during boot.  The default mkinitrd /boot/initrd-2.4.18-686-raid1
2.4.18-686-raid1 will not suffice.

Try this.

mkinitrd --preload=raid1 --preload=xor /boot/initrd-2.4.18-686-raid1
2.4.18-686-raid1

That should do the trick.  The default mkinitrd doesn't install any
actual modules in the ramdisk file.  


Not sure about on debian, but raidtools should have at least the
following tools.

/sbin/arytst
/sbin/detect_multipath
/sbin/lsraid
/sbin/mkraid
/sbin/raid0run
/sbin/raidhotadd
/sbin/raidhotgenerateerror
/sbin/raidhotremove
/sbin/raidreconf
/sbin/raidsetfaulty
/sbin/raidstart
/sbin/raidstop


Hope this helps.

-sb

On Mon, 2002-06-17 at 14:50, Jakob Oestergaard wrote:
> On Mon, Jun 17, 2002 at 05:15:11PM +0200, Thomas -Balu- Walter wrote:
> > First two smaller questions/notes:
> > The FAQ at http://www.tldp.org/FAQ/Linux-RAID-FAQ/index.html lists
> > three mailinglist-archives, while only
> > http://marc.theaimsgroup.com/?l=linux-raid&r=1&w=2 seems to have actual
> > mails (I was kinda shocked that the last mails were coming from 2000 :)
> > 
> > What are the actual raidtools? raidtools-20010914?
> 
> On debian woody here, I use 0.90.20010914-15
> 
> > 
> > Now to a something more complex problem (which I am going to despair on):
> > 
> > I've read different HOWTOs, Hints, Tipps and tricks, but none helped.
> 
> I'm sorry to hear that  :)
> 
> > 
> > I am trying to set up a debian (woody) system running the
> > debian-packaged 2.4.18-686-kernel that boots from "root=/dev/md1" (and
> > uses the debian-initrd to load the md-modules)
> > 
> > To do so, I've installed a minimal woody using a netinstall-CD and
> > upgraded it to kernel-image-2.4.18-686 (including the initrd-changes to
> > lilo). The system got installed on hda:
> > 
> > Disk /dev/hda: 4865 cylinders, 255 heads, 63 sectors/track
> > Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0
> > 
> >    Device Boot Start     End   #cyls   #blocks   Id  System
> > /dev/hda1   *      0+      5       6-    48163+  83  Linux
> > /dev/hda2          6      67      62    498015   82  Linux swap
> > /dev/hda3         68     675     608   4883760   83  Linux
> > /dev/hda4          0       -       0         0    0  Empty
> > 
> > while /dev/hhda1 is mounted as /boot and /dev/hda3 is mounted as / and
> > /dev/hdc got exact the same partition table. 
> > 
> > I rebooted to get 2.4.18 up and running, then I've changed the
> > /dev/hdc-partitions to be Raid-Autodetect and set up the following
> > /etc/raidtab:
> > 
> >         # /boot
> >         raiddev /dev/md0
> >                 raid-level      1
> >                 nr-raid-disks   2
> >                 nr-spare-disks  0
> >                 chunk-size      4
> >                 persistent-superblock   1
> >                 device          /dev/hdc1
> >                 raid-disk       0
> >                 device          /dev/hda1
> >                 failed-disk     1
> > 
> >         # /
> >         raiddev /dev/md1
> >                 raid-level      1
> >                 nr-raid-disks   2
> >                 nr-spare-disks  0
> >                 chunk-size      4
> >                 persistent-superblock   1
> >                 device          /dev/hdc3
> >                 raid-disk       0
> >                 device          /dev/hda3
> >                 failed-disk     1
> 
> Good
> 
> > 
> > I've prepared the md-devices using mkraid and mke2fs, mounted them
> >         /dev/md1 -> /mnt
> >         /dev/md0 -> /mnt/boot
> 
> Good
> 
> > 
> > Next was to "cp -a" the installed system on the md-devices (all but
> > /mnt, /proc and /lost+found) and change /mnt/etc/fstab to mount the
> > md-devices instead of the original /dev/hda partitions.
> > 
> > So far, everything is okay. Next I tried to reboot and at boot I told
> > lilo to run "Linux root=/dev/md1", but I get
> > 
> >         md: md driver 0.90.0 MAX_MD...
> >         cramfs: wrong magic
> >         EXT3-FS: unable to read superblock
> >         EXT2-FS: unable to read superblock
> >         Kernel panic: VFS: Unable to mount root fs on 09:01
> 
> Since it's cramfs that complains, I suppose it's your initrd that is
> bad.
> 
> > 
> > Missing the raid-module, I've added "raid1" to /etc/mkinitrd/modules and
> > created a new initrd:
> >       # mkinitrd -o /boot/initrd-2.4.18-686-raid1 /lib/modules/2.4.18-686
> >       # ln -sf /boot/initrd-2.4.18-686-raid1 /initrd.img
> >       # lilo
> > 
> > Now the raid1-module gets loaded right after the md-module, but I keep
> > getting the same error.
> > 
> > I've also tried the way James Bromberger suggests in
> > http://www.james.rcpt.to/programs/debian/raid1/ - especially using
> > (manually entered by now though) the append parameters
> > "md=0,/dev/hdc1,/dev/hda1", and "root=/dev/md0" (and
> > "md=1,/dev/hdc3,/dev/hda3") and and and.
> > 
> > Also tested was root=/dev/md1 in mkinitrd.conf.
> > 
> > Another approach was adding the values to lilo.conf - 
> >         boot=/dev/md0
> >         root=/dev/md1
> > (which should not make a difference than adding it to the lilo-prompt?)
> > 
> > One of my biggest problems is, that I don't know where the problem is
> > located - is it lilo (which boots the kernel and initrd and should be
> > fine?), initrd (missing a module?) or the root-filesystem on the
> > md-devices, or even the md-devices themself (it should be possible to
> > boot from a degraded device?)
> 
> It looks like you have an initrd problem.
> 
> > 
> > I am really clueless... :-/ any hints?
> 
> Compile the RAID-1 into the kernel, forget about using modules.  That is
> the simple solution that I use - I am no initrd expert, and I have no
> intentions of becoming one  :)
> 
> -- 
> ................................................................
> :   jakob@unthought.net   : And I see the elder races,         :
> :.........................: putrid forms of man                :
> :   Jakob Østergaard      : See him rise and claim the earth,  :
> :        OZ9ABN           : his downfall is at hand.           :
> :.........................:............{Konkhra}...............:
> -
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