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LVM and devfs (I'm intrigued)



Hi Patrick,

I've just read #123069, and this is after I yesterday briefly had LVM up and
running on a stock Debian kernel without devfs mount or devfsd installed.

I shortly afterwards hosed the install and now have LVM on top of a RAID1
device (again, without devfs involved, but with a stock kernel).

For the brief period of time that I had the straight LVM going, the sky
didn't fall on me.

What is the exact nature of the issues with LVM1 and kernels with devfs
enabled (but not mounted)? Does it just randomly screw up, or is it not
supposed to work at all?

I'm doing a bit of testing work for the new debian-installer, and I recently
provided a patch for the lvmcfg udeb (it previously wasn't installing lvm10
in the new installation if the installer had set up logical volumes).

Currently, on a newly installed Debian system installed by d-i, where LVM
has been employed, does not have devfsd installed, and it's using a stock
Debian kernel, so devfs is enabled, but not mounted. If this is some sort of
random time bomb, we need to address it and ensure that devfsd does get
installed, and devfs does get mounted, because the last thing we want to do
is have d-i spitting out unreliable sarge installs that use LVM.

regards

Andrew

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