Re: [Patch] mdadm: move mdadm.map file into /dev/md

[Goswin von Brederlow <goswin-v-b@web.de>]

Doug Ledford <dledford@redhat.com> writes:

> Originally, mdadm used /var/run/mdadm/mdadm.map file to store the
> temporary mappings of incrementally added devices to device names.
> Unfortunately, this breaks incremental assembly if used early in the
> booting process.  Specifically, root may still be read only.  Since
> incremental assembly is largely a udev specific feature, and udev
> needs a writable /dev tmpfs mount even when root is still read only,
> it's safer to put our mdadm.map file in /dev/md so that we can write
> to the map file no matter how early in the boot process we are
> attempting to use incremental assembly.

What about /lib/init/rw?

You say largely udev specific so there might not be an udev running
and no tmpfs on /dev.

MfG
        Goswin