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Software RAID-1 install problem

Hello,

I just want to install a software raid-1 system on my debian sarge box.
I followed the instruction from the following site:
http://www.epimetrics.com/topics/on...ge_topic_id=120

The difference that I have only a / and a /home partition.
I compiled my kernel (2.6.8) with RAID support.
After the reboot I got a Kernel panic. See my log:
KernelPanic

In the tutorial there was no initrd defined in the grub menu list. Can it be the problem?

What did I wrong?

Thanks!

(I posted this topic on Debian topic 2 days ago, but maybe it is more general problem)

My fstab:

Code:

:debian:/# more /etc/fstab

# /etc/fstab: static file system information.

#

# <file system> <mount point>  <type>  <options>      <dump>  <pass>

proc            /proc          proc    defaults        0      0

/dev/md0        /              ext3    defaults,errors=remount-ro 0      1

/dev/md1        /home          ext3    defaults,usrquota,grpquota        0

  2

/dev/hda5      none            swap    sw,pri=1              0      0

/dev/hdc5      none            swap    sw,pri=1              0      0

/dev/hdb        /media/cdrom0  iso9660 ro,user,noauto  0      0

/dev/fd0

My hda:

Code:

:debian:/# sfdisk -l /dev/hda



Disk /dev/hda: 8322 cylinders, 16 heads, 63 sectors/track

Warning: extended partition does not start at a cylinder boundary.

DOS and Linux will interpret the contents differently.

Warning: The partition table looks like it was made

  for C/H/S=*/255/63 (instead of 8322/16/63).

For this listing I'll assume that geometry.

Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0



  Device Boot Start    End  #cyls    #blocks  Id  System

/dev/hda1  *      0+    158    159-  1277136  fd  Linux raid autodetect

/dev/hda2        159    521    363    2915797+  5  Extended

/dev/hda3          0      -      0          0    0  Empty

/dev/hda4          0      -      0          0    0  Empty

/dev/hda5        159+    180      22-    176683+  82  Linux swap / Solaris

/dev/hda6        181+    521    341-  2739051  fd  Linux raid autodetect

debian:/#

and hdc:

Code:

:debian:/# sfdisk -l /dev/hdc



Disk /dev/hdc: 8322 cylinders, 16 heads, 63 sectors/track

Warning: extended partition does not start at a cylinder boundary.

DOS and Linux will interpret the contents differently.

Units = cylinders of 516096 bytes, blocks of 1024 bytes, counting from 0



  Device Boot Start    End  #cyls    #blocks  Id  System

/dev/hdc1  *      0+  2534-  2534    1277136  fd  Linux raid autodetect

/dev/hdc2      2534+  8319-  5786-  2915797+  5  Extended

/dev/hdc3          0      -      0          0    0  Empty

/dev/hdc4          0      -      0          0    0  Empty

/dev/hdc5      2534+  2884-    351-    176683+  82  Linux swap / Solaris

/dev/hdc6      2884+  8319-  5435-  2739051  fd  Linux raid autodetect

debian:/#

And at the end my grub menu list:

Code:

:## ## End Default Options ##



title          Debian GNU/Linux, kernel 2.6.8-bali2

root            (hd0,0)

kernel          /boot/vmlinuz-2.6.8-bali2 ro root=/dev/md0 md=0,/dev/hda1,/dev/h

dc1

initrd          /boot/initrd.img-2.6.8-bali2

savedefault

boot



title          Debian GNU/Linux, kernel 2.6.8-bali2 (recovery mode)

root            (hd0,0)

kernel          /boot/vmlinuz-2.6.8-bali2 ro root=/dev/md0 md=0,/dev/hdc1

initrd          /boot/initrd.img-2.6.8-bali2

savedefault

boot



title          Debian GNU/Linux, kernel 2.6.8-2-686

root            (hd0,0)

kernel          /boot/vmlinuz-2.6.8-2-686 root=/dev/hda1 ro

initrd          /boot/initrd.img-2.6.8-2-686

savedefault

boot



title          Debian GNU/Linux, kernel 2.6.8-2-686 (recovery mode)

root            (hd0,0)

kernel          /boot/vmlinuz-2.6.8-2-686 root=/dev/hda1 ro single

initrd          /boot/initrd.img-2.6.8-2-686

savedefault

boot



title          Debian GNU/Linux, kernel 2.4.27-2-386

root            (hd0,0)

kernel          /boot/vmlinuz-2.4.27-2-386 root=/dev/hda1 ro

initrd          /boot/initrd.img-2.4.27-2-386

savedefault

boot



title          Debian GNU/Linux, kernel 2.4.27-2-386 (recovery mode)

root            (hd0,0)

kernel          /boot/vmlinuz-2.4.27-2-386 root=/dev/hda1 ro single

initrd          /boot/initrd.img-2.4.27-2-386

savedefault

boot



### END DEBIAN AUTOMAGIC KERNELS LIST

debian:/#

Re: Software RAID-1 install problem

I just want to install a software raid-1 system on my debian sarge box.
I followed the instruction from the following site:
http://www.epimetrics.com/topics/on...ge_topic_id=120
These instructions need a little fine tuning for Debian
(read them the other day, cant load them today)
However, after a quick glance, this looks ok:
http://www.linuxhowtos.org/System/raid.htm

The difference that I have only a / and a /home partition.
Things get a lot easier with a non-Raid /boot partition

I compiled my kernel (2.6.8) with RAID support.
For Debian, do these as modules (as per Debian standards) and mkinitrd will
make an initrd for you including ramdisk and tools.
(also provided everything is configured properly ;) )

In the tutorial there was no initrd defined in the grub menu list. Can it be the problem?
It's not for Debian. Debian uses an initrd because of modules.
How did you create your initrd?

What did I wrong?
My guess would be that you haven't made your initrd properly or your root filesystem has
not been populated properly. You might also want to ensure udev is enabled in the kernel
and that the udev daemon is installed.

(I posted this topic on Debian topic 2 days ago, but maybe it is more general problem)
I got half way through an answer (comparing it to LVM-root with Raid 0) when I got distracted
... or lost .... can't remember. :)
EDIT: Now I remember that the system I have root on LVM+Raid also runs Xen, so the
grub entry might be hard(er) to follow.

Code:

:debian:/# more /etc/fstab

# /etc/fstab: static file system information.

#

# <file system> <mount point>  <type>  <options>      <dump>  <pass>

proc            /proc          proc    defaults        0      0

/dev/md0        /              ext3    defaults,errors=remount-ro 0      1

/dev/md1        /home          ext3    defaults,usrquota,grpquota        0

  2

/dev/hda5      none            swap    sw,pri=1              0      0

/dev/hdc5      none            swap    sw,pri=1              0      0

/dev/hdb        /media/cdrom0  iso9660 ro,user,noauto  0      0

/dev/fd0

Just for sanity, do the following give good results?
# e2fsck /dev/md0
# e2fsck /dev/md1

Code:

title          Debian GNU/Linux, kernel 2.6.8-bali2

root            (hd0,0)

kernel          /boot/vmlinuz-2.6.8-bali2 ro root=/dev/md0 md=0,/dev/hda1,/dev/h

dc1

initrd          /boot/initrd.img-2.6.8-bali2

savedefault

boot

I doubt you need the md options.

Here's what I've got that might help:

Code:

title          Xen Stable - Debian Stable

root            (hd0,0)

kernel          /xen-2.0.7.gz root=/dev/ram0 ro dom0_mem=81920 physdev_dom0_hide=(00:0a.0)(00:0b.0)(00:06.0)(00:07.2)

module          /vmlinuz-2.6.11.12-xen0 root=/dev/vg0/root ro console=tty0

module          /initrd.img-2.6.11.12-xen0

savedefault

boot

Forget the dom0 options and the first module line, exchange 'module' on the second module
line with 'initrd'. Note that my root option is the same as yours, but that I have a boot
partition in that location ... I think this is your error. Grub doesn't know how to
read a raid device to get the kernel and initrd from.

So yours might look something like this (if you add a boot partition!!!)

Code:

title          Debian GNU/Linux, kernel 2.6.8-bali2

root            (hd0,0)

kernel          /vmlinuz-2.6.8-bali2 ro root=/dev/md0

initrd          /initrd.img-2.6.8-bali2

savedefault

boot

Here's something else you'll need for Debian's mkinitrd to produce the correct result.
# cat /etc/mdadm/mdadm.conf

Code:

DEVICE partitions

ARRAY /dev/md0 level=raid0 num-devices=2 UUID=72c1f448:2d5f8521:431d286d:3de5be1d

  devices=/dev/hda3,/dev/hdc3

ARRAY /dev/md1 level=raid0 num-devices=2 UUID=f739cdb1:7cfb3f92:605674de:969a9c53

        devices=/dev/hda6,/dev/hdc6

ARRAY /dev/md2 level=raid0 num-devices=2 UUID=0b81ec82:8cd3167c:8192ec98:f749babc

        devices=/dev/hda7,/dev/hdc7

Well, getting distracted again ... haven't finished ... but probably enough for you to chew on ...later

ps. not sure about the sarge installed, but the Debian NetInst CD's are able to install
to raid ... why don't you try that? ... You'll end up with a bootable system with everything
in the correct (Debian) place.