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41 lines
1.9 KiB
Plaintext
41 lines
1.9 KiB
Plaintext
http://poochiereds.net/svn/lvm2/
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This is the lvm2create_initrd script written by Miguel Cabeca, with some small
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modifications by myself.
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Here are some other requirements and tips for using it:
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1) this script uses busybox on the initrd image, hence busybox needs to be
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installed when you create your initrd.
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2) Make sure /etc/lvm/lvm.conf is set up correctly before running this. In
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particular, if you're using LVM on RAID, make sure that you have a filter that
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excludes the RAID component devices (this may not be necessary with the latest
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patch by Luca Berra, but it doesn't hurt).
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3) This initrd image does not support modules. If you need to plug in any
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kernel modules during the initrd phase, then you'll need to hand-modify the
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image.
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4) The generated initrd image supports an 'lvm2rescue' mode as well. If you add
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the parameter 'lvmrescue' on the kernel command line, it will run a shell at
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the end of the initrd 'init' script. This can be helpful when trying to fix a
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corrupt root volume or root LVM2 volume group.
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5) No userspace md tools are installed, so if you're using LVM on RAID, then
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you'll probably want to mark your RAID partitions as type 'fd' so that the
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kernel will start them automagically (or hand-modify the image).
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6) I'm not sure if devfs will work with this or not. udev, however does work,
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and is recommended. Because the dm-* devices use dynamically allocated major
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and minor numbers, kernel upgrades and the like can renumber your devices. To
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fix this, you need to run a 'vgscan --mknodes' prior to fscking and mounting
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your rootfs. Doing this with a static /dev creates a problem though -- you
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will be modifying the root filesystem before it has been fsck'ed. udev gets
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around this by mounting a ramdisk over /dev, but you'll probably need to add
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a startup script that creates devices in /dev. The lvm2udev script in this
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directory is an example of such a beast.
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--
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Jeffrey Layton <jtlayton@poochiereds.net>
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