migrating to LVM - ReadList.com

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migrating to LVM
\ Thufir (17 Oct 2007)
. \ Dirk Heinrichs (17 Oct 2007)
. . \ Albert Hopkins (17 Oct 2007)
. \ Thufir (18 Oct 2007)
. . \ Dirk Heinrichs (18 Oct 2007)
. \ Thufir (19 Oct 2007)
. . \ Don Jerman (19 Oct 2007)
. . . \ Neil Bothwick (20 Oct 2007)
. . . . \ Albert Hopkins (21 Oct 2007)
. . . . \ Don Jerman (21 Oct 2007)
. . . . . \ Neil Bothwick (21 Oct 2007)
. \ Thufir (19 Oct 2007)
. \ Thufir (22 Oct 2007)

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Subject:	migrating to LVM
Group:	Gentoo-user
From:	Thufir
Date:	17 Oct 2007

I have a working gentoo install which I don't want to muck with too much,
except to change over to LVM. I understand that I can use dd so that
everything will be in a LVM, but I'm unclear on the outline. The LVM is
created, the root partition is copied over to the LVM, then grub, fstab
and initrd and edited to reflect the changes?

arrakis ~ #
arrakis ~ # fdisk /dev/hda

The number of cylinders for this disk is set to 9729.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
(e.g., DOS FDISK, OS/2 FDISK)

Command (m for help): p

Disk /dev/hda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/hda1 1 1912 15358108+ 83 Linux
/dev/hda2 1913 1925 104422+ 83 Linux
/dev/hda3 1926 9729 62685630 8e Linux LVM

Command (m for help): q

arrakis ~ #
arrakis ~ # fdisk /dev/hdb

The number of cylinders for this disk is set to 59582.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
(e.g., DOS FDISK, OS/2 FDISK)

Command (m for help): p

Disk /dev/hdb: 30.7 GB, 30750031872 bytes
16 heads, 63 sectors/track, 59582 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes

Device Boot Start End Blocks Id System
/dev/hdb1 1 203 102280+ 83 Linux
/dev/hdb2 204 2109 960624 82 Linux swap /
Solaris
/dev/hdb3 2110 59579 28964880 83 Linux

Command (m for help): q

arrakis ~ #
arrakis ~ # date
Tue Oct 16 22:10:22 PDT 2007
arrakis ~ #

thanks,

Thufir

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