[linux-lvm] Changing device numbers.

[Bas]

----- Original Message -----
From: Heinz J. Mauelshagen <Mauelshagen at sistina.com>
To: <linux-lvm at sistina.com>
Sent: woensdag 14 maart 2001 8:37
Subject: Re: [linux-lvm] Changing device numbers.


> On Tue, Mar 13, 2001 at 02:37:06PM -0700, Andreas Dilger wrote:
> > Bas writes:
> > > Rerunning lilo seemed to work, but I had the same problem just a while
ago
> > > without changing anything but adding a LV.
> >
> > Maybe because you are running "vgscan" on each boot?  It is not really
> > needed by LVM unless the disk configuration changes.  When you run it,
> > there is the possibility of the VG and LV devices changing major
numbers.
> >
> > Even so, it is a problem (IMHO) that LVM likes to delete all of the
> > device files each time vgscan is run.  The correct thing to do would
> > be to have "pvscan" create a file of UUID->disk mappings on each boot,
> > and leave the LVM devices alone.  Then vgscan would only be needed if
> > there is a major disaster.
>
> Andreas, we are planning for something very similar to this, because we
need
> it for Cluster-LVM anyway: the driver will do the scanning and keep
> the mapping list which can be requested by the tools later.
>

That looks good. How are minor numbers assigned now ? By LE (1st LE means
device number 58,0) ?