[Cross-posted to Linux LVM and Red Hat 8.1 Beta lists.]
I've packaged up versions of lvm1, lvm2, devmapper, and mkinitrd for use
with Red Hat 8. I'd like to see similar changes rolled into RedHat 8.1,
so that it is 2.6-ready, and would appreciate comments and wider testing.
WARNING: These are *alpha*-quality developer-only packages! Don't entrust
your data to them!
What I've done so far:
- Modified and repackaged LVM1 to create a single /sbin/lvm1 executable, like
LVM2, and use symlinks for the legacy commands. Broke the monolithic
LVM package into sub-packages, so that it can coexist with LVM2.
Provided an /sbin/lvm1.static that is linked against diet libc.
- Packaged devmapper with a tiny statically-linked C program (mkdmctl)
used to create the control file. This is useful in combination with
nash for the RedHat initrd, since nash is not a real shell.
- Packaged LVM2. Provides an /sbin/lvm2.static that is linked against diet libc.
- Modified mkinitrd to take a --lvm-version={1,2} argument to specify
which LVM version to use. With 2.4.20-2.2, my initrds (with aic7xxxx)
are 475287 bytes (LVM1) and 472105 bytes (LVM2), so they fit on a 1722kB
floppy.
- Made the minimal hack to rc.sysinit required to make it boot.
Basically, I just want to use LVM2, but have the box function properly
if for some reason I need to boot a kernel without device mapper.
Do not trust this patch with your
Currently, I have LVM{1,2} installed as /sbin/lvm{1,2}. There are two
"links" packages that Provide (in the RPM sense) "lvm". The lvm1-links
sub-package has symlinks pointing -> lvm1. The lvm2-links sub-package
has links pointing -> lvm, which is a currently a shell script that invokes
one of lvm{1,2}, but could simply be a symlink determined at boot.
I'm currently running root-on-LVM with the RedHat 2.4.20-2.2 kernel.
I managed to destroy my root partition in the process of debugging these
packages. [Fortunately, I saved a copy in a non-LVM partition.] I believe
that the problem is with switching LVM versions when there are stale
/dev/<vg> directories left over if the box is not shutdown cleanly ...
Find the packages here:
ftp://67.83.203.127:/pub/lvm
[Caution: my home cable modem, so upstream bandwidth is quite limited.
I know, I should set up dyndns at a minimum, but another day ...]
Regards,
Bill Rugolsky
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