How to change disk sequence on DELL R900 with LINUX

[Thomas Fess]

Linux defines the devices as they come up or become available so depending on what your doing that this, it causes an issue.  Such as san disks(multipathing) and mounts or ASM in oracle or whatever, you have to use another method to define a persistant name to the LUN/disk etc.

http://dims.ncsa.uiuc.edu/set/san/src/linux-mpio.pdf




________________________________
From: mcclnx mcc <mcclnx at yahoo.com.tw>
To: redhat-list at redhat.com
Sent: Tuesday, June 30, 2009 8:51:18 AM
Subject: How to change disk sequence on DELL R900 with LINUX


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

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

after I configured PERC 6/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 eth1 bnx2

how to change sequence back?

Thanks.



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