Re: Moving LVM partition from /dev/hda2 to /dev/sda2

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On 20 Feb 2006 at 22:21, Mikkel L. Ellertson wrote:

Date sent: Mon, 20 Feb 2006 22:21:25 -0600
From: "Mikkel L. Ellertson" <mikkel@xxxxxxxxxxxxxxxx>
Organization: Infinity Ltd.
To: For users of Fedora Core releases <fedora-list@xxxxxxxxxx>
Subject: Re: Moving LVM partition from /dev/hda2 to /dev/sda2
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Michael D. Setzer II wrote:
On 20 Feb 2006 at 23:33, Paul Howarth wrote:


Does your SATA drive need some driver module to be loaded?
This might come from the ramdisk in rescue mode (and hence work), whilst
not being present in the ramdisk created at kernel install time for the
regular IDE drive (and hence not work). A possibility perhaps.



I can mount the other partitions from old drive. So, I don't think it needs any
special driver. I can mount /dev/sda1 to /boot2, which is the boot partition,
and I formated the extra space on the drive as /dev/sda3 as /data.

When I remove the old drive, and boot from the SATA drive it gets to the
grub menu, and seems to load the kernel, but then doesn't find the LVM
partition.

When I run lvm command after booting from the old drive, one of the
commands will list the duplicate volumes found, and also that the one is
using /dev/sda2 instead of /dev/hda2.

One comment I got said it might be using something other than hd0 for the
SATA drive, but it also might be that the LVM volumn has something in it
that links it to /dev/hda2.

Thanks for the info.

That is a good indication that the initrd.img on the SATA drive does
not have the correct modules for the SATA drive in it. Because it
can not access the SATA drive, it can not load the modules needed to
access it. This is not a problem with the IDE drive, because the
modules are in the initrd.img. After the root file system is
mounted, the kernel can load the module for the SATA drive, and
mount the LVM partition from the SATA drive. So you will need to
build a new initrd.img for the SATA drive.

That might be it. I find that lsmod lists the following when booted from the
regular drive.
sata_sis 8261 0
libata 56653 1 sata_sis

Question is how does on do the update to add this. I tried doing an upgrade
from the DVD to the SATA drive, but it said something about no kernel
installed, so it didn't update the grub or anything else, and the reboot did the
same thing. Perhaps removing the kernels from the boot would cause it to
update the kernel and other files.


Here is the last part of the boot process before the error, so it can load the
/boot from the sata drive, and load the kernel from it.

Uncompressing Linux... OK, booting the kernel.
Red Hat nash version 4.2.15 starting
Reading all physical volumes. This may take a while...
No volume groups found
unable to find volume group "VolGroup00"
ERROR: /bin/lvm exiting abnormally with value 5 !(pid 480)


Mikkel
--

Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!

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