Re: [OSR-devel] Remounting New Root After Booting

[Marc G. <gr...@at...>]

On Thursday 11 October 2007 12:23:53 Gordan Bobic wrote:
> >>>>>>>>> And, obviously, I'd need to make all this happen before the
> >>>>>>>>> normal boot process tries to mount the root disk.
> >>>>>>>>
> >>>>>>>> Do it before or right after scsi-start is called.
> >>>>>>>
> >>>>>>> I can't find any reference to "scsi-start". Where does this happen?
> >>>>>>
> >>>>>> It's scsi_start in linux.generic.sh Line 239.
> >>>>>
> >>>>> D'oh! What a difference an _ makes.
> >>>>>
> >>>>> I think the iSCSI stuff should be added before the dm_start stuff,
> >>>>> which is just before the scsi_start.
> >>>>>
> >>>>> Right, that seems to have worked. Almost there. Now I get:
> >>>>>
> >>>>> Mounting LABEL=/ on /mnt/newroot..device not found error [FAILED]
> >>>>> Mounting /cdsl.local on /cluster/cdsl/3..no cdsldir found
> >>>>> "/mnt/mewroot//cluster/cdsl"
> >>>>> Could not mount cdsl /cdsl.local to /cluster/cdsl/3. Exiting
> >>>>>
> >>>>> Where does it get the LABEL=/ from? I'm pretty sure I didn't set any.
> >>>>
> >>>> Concerning LABEL=/
> >>>> I think you should check you bootloader config and change root=LABEL=/
> >>>> to root=/dev/sd.. That should do it.
> >>>
> >>> What files is that in?
> >>
> >> this is setup by your root environment. Normally in grub. There should
> >> be something comparable on your pxe environment if you use it.
> >> default from redhat:
> >> [root@mobilix-01 ~]# cat /proc/cmdline
> >> ro root=LABEL=/ rhgb quiet
> >> sharedroot cluster:
> >> [root@axqa03_1 ~]# cat /proc/cmdline
> >> root=/dev/vg_axqa03_sr/lv_sharedroot com-step com-debug
> >
> > Oh, THAT root= parameter! Right. I'm feeling really stupid now. :'(
>
> Ah, minor problem. Not a big deal, but potentially a problem nevertheless.
> If we fire up iSCSI _first_ (i.e. before normal SCSI), then the iSCSI
> drive appears as sda, and the local disk becomes sdb. Does anyone think
> this might end up being a problem? I can't immediately think of why this
> might be a problem, other than it perhaps being a little illogical to have
> the local disks listed _after_ remote disks.
>
> I expect the solution would be to just modprobe sd_mod before starting up
> iSCSI.
>
> Any thoughts on this?
Just do it. We long ago stopped relying on any order of on which disk lies 
what. So no problem from our side.
>
> Gordan
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Splunk Inc.
> Still grepping through log files to find problems?  Stop.
> Now Search log events and configuration files using AJAX and a browser.
> Download your FREE copy of Splunk now >> http://get.splunk.com/
> _______________________________________________
> Open-sharedroot-devel mailing list
> Ope...@li...
> https://lists.sourceforge.net/lists/listinfo/open-sharedroot-devel



-- 
Gruss / Regards,

Marc Grimme
Phone: +49-89 452 3538-14
http://www.atix.de/               http://www.open-sharedroot.org/

**

Visit us at LinuxWorld Conference & Expo 
31.10. - 01.11.2007 in Jaarbeurs Utrecht - The Netherlands
ATIX stand: Hall 9 / B 005

**
ATIX Informationstechnologie und Consulting AG
Einsteinstr. 10 
85716 Unterschleissheim
Deutschland/Germany

Phone: +49-89 452 3538-0
Fax:   +49-89 990 1766-0

Registergericht: Amtsgericht Muenchen
Registernummer: HRB 168930
USt.-Id.: DE209485962

Vorstand: 
Marc Grimme, Mark Hlawatschek, Thomas Merz (Vors.)

Vorsitzender des Aufsichtsrats:
Dr. Martin Buss