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xen-users
RE: [Xen-users] prob HVM boot image sco
At 2007-06-12 16:29 +0200, Petersson, Mats wrote:
> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of
> Torsten Lehmann
> Sent: 12 June 2007 15:09
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-users] prob HVM boot image sco
>
>
> Hallo xenusers!
>
>
> I want port a very old sco to to xenU.
>
> xen (HVM) cannot boot this image.
> This Partition cannot mounted.
> Whats going wrong?
> Is HD-geometry a cause of this problem?
It's possible that the geometry is the problem, particularly if the SCO
image is so old that it's not using LBA-addressing of the sectors. [In
LBA-mode, the sector number is one LARGE number, but in non-LBA mode,
it's a composition of the head, cylinder and sector. If for some reason
the boot-loader has stored the original HCS location for some component,
it's quite likely that it will not find the right place with a different
geometry].
Do you have any information in the /var/log/xen/qemu-dm.<pid>.log for
the domain? [using "ls -ltr" to list the "latest" one is a good way to
find which is the one you've just got, as they are "named" based on the
process ID of the qemu-dm, which isn't particularly helpful in knowing
which one is new and old].
One other thing that looks a bit weird is the partition info: It seems
like you have moved from partition 1 to partition 4 for some reason...
Maybe this is just a difference between Linux and sco fdisk apps, but it
does look a bit "strange" to me.
SCO used to number its partitions in the reverse order to DOS/Windows/OS2.
I discovered this when I was dual booting an old 486.
Geoff
--
Mats
>
> regards Torsten
> Launoc
>
> ----------------------------------------------------------------------
> Details:
>
> sco # uname -a
> SCO_SV n7275sc1 3.2 2 i386
>
> sco # fdisk
>
> 1. Display Partition Table
> 2. Use Entire Disk for UNIX
> 3. Use Rest of Disk for UNIX
> 4. Create UNIX Partition
> 5. Activate Partition
> 6. Delete Partition
> 7. Create Partition
>
> Enter your choice or 'q' to quit: 1
>
> Current Hard Disk Drive: /dev/rhd00
>
>
> +-------------+----------+-----------+---------+---------+---------+
> | Partition | Status | Type | Start |
> End | Size|
>
> +-------------+----------+-----------+---------+---------+---------+
> | 1 | Active | UNIX | 1 |
> 134129 | 134129|
>
> +-------------+----------+-----------+---------+---------+---------+
>
>
>
> - create img
>
> sco # dd if=/dev/rhd00 | rcmd $rhost -l admin dd of=$hdimg
>
> xen # fdisk -l $hdimg
> You must set cylinders.
> You can do this from the extra functions menu.
>
> Disk sco.dd: 0 MB, 0 bytes
> 255 heads, 63 sectors/track, 0 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
> Device Boot Start End Blocks Id System
> sco.dd4 * 1 526 4225063+ 63 GNU
> HURD or SysV
>
>
>
> ------------------------------------------------------------------
> - test 1 boot_xenu
>
>
> xen:~# xm create vm3_sco -c
> Using config file "/etc/xen/vm3_sco".
> Started domain vm3
>
>
> Boot from Hard Disk failed: could not read the boot disk
> FATAL: No bootable device
>
>
> -------------------------------------------------------------------
> - test 2 mount_partition
>
> hdimg=sco.dd
> fdisk -l $hdimg
> Cb=1
> seekblk=$((($Cb-1)*63*255)); ## fdisk
> echo "Cb=$Cb Ctmp=$Ctmp seekblk=$seekblk"
>
> ## lese-test HDimg (s. qemu/060204.test_qemu_img_create)
> devloop=`losetup -f`
> mntdir=/mnt/tmp
> losetup -o $seekblk $devloop $hdimg
> mount $devloop $mntdir
> # or: lomount -diskimage $hdimg -partition 4 $mntdir
> df $mntdirdst
> umount $mntdirdst
> losetup -d $devloop
>
> -------------
> - result:
> # lsmod | grep sysv
> sysv 28804 0
>
> # lomount -diskimage $hdimg -partition 4 $mntdir
> mount: you must specify the filesystem type
>
> # mount -t sysv $devloop $mntdir
> mount: wrong fs type, bad option, bad superblock on /dev/loop1,
> missing codepage or other error
> In some cases useful info is found in syslog - try
> dmesg | tail or so
>
>
> -------------------------------------------------------------------
>
> - geometry of orginal HD:
> C H S
> 526 255 63
>
> - geometry supported by qemu (man qemu)
> x 16 63
>
> -------------------------------------------------------------------
>
>
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
>
>
>
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