CentOS - Jun 2009 - How to change Disk sequence on DELL R900 CENTOS 5.3?

we have DELL R900 with CENTOS 5.3 in it.  This DELL R900 come with one integrate
PERC6/I and two PERC6/E card.  DELL 6/I control 5 internal disks.   The original
disk sequence are:

/dev/sda1 /boot
/dev/sda2 /
/dev/sdb1  swap
...

after I configured PERC6/E disks and reboot, /dev/sda change to RAID disk and
original /boot and / change to /dev/sde1 and /dev/sde2.

My modprobe.conf is:

alias scsi_hostadapter megaraid_sas
alias scsi_hostadapter1 ata_piix
alias eth0 bnx2
alias eth0.1998 bnx2
alias eth1 bnx2

how to change sequence back?

Thanks.


     
______________________________________________________________________________________________________
?????????Yahoo!??????2.0????????????? http://tw.mg0.mail.yahoo.com/dc/landing

>how to change sequence back?
Rather than chase that never ending loop, maybe now is the time
to look into an fstab populated by UUID.

Thank you for answer.

"Label" just a way to work around.  It is not real solution.  I know
"udev" can make it work, but "udev" is too complext for me
to understand.

 

--- 09/6/30 (?)?James A. Peltier <jpeltier at fas.sfu.ca> ???
> ???: James A. Peltier <jpeltier at fas.sfu.ca>
> ??: Re: [CentOS] How to change Disk sequence on DELL R900 CENTOS 5.3?
> ???: "CentOS mailing list" <centos at centos.org>
> ??: 2009?6?30?,?,??6:33
> On Mon, 29 Jun 2009, Joseph L. Casale
> wrote:
> 
> >> how to change sequence back?
> >
> > Rather than chase that never ending loop, maybe now is
> the time
> > to look into an fstab populated by UUID.
> > _______________________________________________
> > CentOS mailing list
> > CentOS at centos.org
> > http://lists.centos.org/mailman/listinfo/centos
> >
> 
> Or just label the disks and mount by disk label.
> 
> -- 
> James A. Peltier
> Systems Analyst (FASNet), VIVARIUM Technical Director
> HPC Coordinator
> Simon Fraser University - Burnaby Campus
> Phone???: 778-782-6573
> Fax? ???: 778-782-3045
> E-Mail? : jpeltier at sfu.ca
> Website : http://www.fas.sfu.ca | http://vivarium.cs.sfu.ca
> ? ? ? ? ???http://blogs.sfu.ca/people/jpeltier
> MSN? ???: subatomic_spam at hotmail.com
> 
> The point of the HPC scheduler is to
> keep everyone equally unhappy.
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
> 

     
______________________________________________________________________________________________________
?????????Yahoo!??????2.0????????????? http://tw.mg0.mail.yahoo.com/dc/landing

Thank you for answer.

I change /etc/fstab and using UUID instead of LABEL.  after reboot, UUID did NOT
change disk sequence back to what I want.  Boot device original /dev/sda1, it
still /dev/sdc1 NO change.



--- 09/6/29 (?)?Joseph L. Casale <JCasale at activenetwerx.com> ???
> ???: Joseph L. Casale <JCasale at activenetwerx.com>
> ??: Re: [CentOS] How to change Disk sequence on DELL R900 CENTOS 5.3?
> ???: "'CentOS mailing list'" <centos at centos.org>
> ??: 2009?6?29?,?,??2:22
> >how to change sequence back?
> 
> Rather than chase that never ending loop, maybe now is the
> time
> to look into an fstab populated by UUID.
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
> 

     
______________________________________________________________________________________________________
?????????Yahoo!??????2.0????????????? http://tw.mg0.mail.yahoo.com/dc/landing

Thank you for your answer.

change adapter sequence on /etc/modprobe.conf and rebuild image always my first
try.

Unfortunately it does NOT work on DELL R900.  The reason is DELL R900 internal
RAID and external RAID use same driver.  There is NO way to change adapter
sequence on /etc/modprobe.conf.



--- 09/7/1 (?)?Ross Walker <rswwalker at gmail.com> ???
> ???: Ross Walker <rswwalker at gmail.com>
> ??: Re: [CentOS] How to change Disk sequence on DELL R900 CENTOS 5.3?
> ???: "CentOS mailing list" <centos at centos.org>
> ??: 2009?7?1?,?,??11:59
> 2009/7/1 mcclnx mcc <mcclnx at yahoo.com.tw>:
> >
> > Thank you for answer.
> >
> > I change /etc/fstab and using UUID instead of LABEL.
> ?fter reboot, UUID did NOT change disk sequence back to
> what I want. ?oot device original /dev/sda1, it still
> /dev/sdc1 NO change.
> 
> Modify modprobe.conf to list the disk driver you want
> loaded in the
> order you want then re-make the initrd file:
> 
> For example, say you want your internal SATA disks
> recognized before
> your SAS RAID disks, your modprobe for the scsi_hostadapter
> would look
> something like this:
> 
> alias scsi_hostadapter ata_piix (or ahci, sata_XXX whatever
> your SATA
> controller is)
> alias scsi_hostadapter0 megaraid_sas
> 
> Then you remake your initrd with a command:
> 
> mkinitrd -f /boot/initrd-$(uname -r).img $(uname -r)
> 
> Remember to use LABELs or UUIDs in fstab first or your
> partitions
> won't mount (wrong disk names)!
> 
> Then reboot.
> 
> -Ross
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
> 

     
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?????????Yahoo!??????2.0????????????? http://tw.mg0.mail.yahoo.com/dc/landing

on 6-28-2009 3:12 PM mcclnx mcc spake the following:
> we have DELL R900 with CENTOS 5.3 in it.  This DELL R900 come with one
integrate PERC6/I and two PERC6/E card.  DELL 6/I control 5 internal disks.  
The original disk sequence are:
> 
> /dev/sda1 /boot
> /dev/sda2 /
> /dev/sdb1  swap
> ...
> 
> after I configured PERC6/E disks and reboot, /dev/sda change to RAID disk
and original /boot and / change to /dev/sde1 and /dev/sde2.
> 
> My modprobe.conf is:
> 
> alias scsi_hostadapter megaraid_sas
> alias scsi_hostadapter1 ata_piix
Try swapping these ...IE make the megaraid hostadapter1 and the ata_piix
hostadapter
> alias eth0 bnx2
> alias eth0.1998 bnx2
> alias eth1 bnx2
> 
> how to change sequence back?
> 
> Thanks.
> 
> 
>      
______________________________________________________________________________________________________
> ?I?O?~?e?q?L?W???HYahoo!?_???q?l?H?c2.0?K?O???A?A?H?????????R?I
http://tw.mg0.mail.yahoo.com/dc/landing
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos

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