/dev/disk/by-label/* not populated by initrd

[Jens Dreger <jens.dreger@physik.fu-berlin.de>]

Hi!

A few days ago I installed debian/testing amd64 on one of our servers
to test some 64bit stuff. Upon bootup the machine loaded the SAN
modules (qla*) before the modules for the system disk, so it didn't
make it. I could fix this by blacklisting the modules.

After reading up on udev I understood that I am supposed to write
some rules which make sure the system disks get's a persistent
name. So I gave the disk a label and udevtest shows that it would be
assigned:

  root@zs11:~> udevtest /block/sda/sda1 | grep label
  udev_rules_get_name: add symlink 'disk/by-label/zs11_system'
  create_node: creating symlink '/dev/disk/by-label/zs11_system' to '../../sda1'

The problem is that this does not work inside initrd, but I obviously
need that link for the rootfs. I unpacked the initrd and init has
support for this:

  root@zs11:/boot/initrd.img-2.6.15-1-amd64-generic.unpack> grep LABEL init
                LABEL=*)
                        ROOT="/dev/disk/by-label/${ROOT#LABEL=}"

Booting with kernel-commandline root=LABEL=zs11_system didn't work.

I copied udevtest to the initrd. It shows:

[...]
main: looking at device '/block/sda/sda1' from subsystem 'block'
udev_rules_get_name: no node name set, will use kernel name 'sda1'
lookup_group: specified group unknown 'disk'
create_node: creating device node '/dev/sda1', major = '8', minor = '1', mode = '0660', uid = '0', gid = '0' 
main: run: 'socket:/org/kernel/udev/monitor'
[...]

I know that this is probably a debian issue but I would like to know
how to debug this further. In initrd there is no syslog, so increasing
the udev_log in udev.conf won't help unless I get syslog running
inside initrd. Apparently also groups are unknown at that time. Is
there a better way to find out what's wrong? Any ideas why
/dev/disk/by-label is not populated? vol_id is available in the
initrd.

Thanks in advance,

Jens.

-- 
Jens Dreger                      Freie Universitaet Berlin
dreger@physik.fu-berlin.de       Fachbereich Physik - ZEDV
Tel: +49 30 83854774             Arnimallee 14
Fax: +49 30 83855902	         14195 Berlin


-------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid\x120709&bid&3057&dat\x121642
_______________________________________________
Linux-hotplug-devel mailing list  http://linux-hotplug.sourceforge.net
Linux-hotplug-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel