Re: How to change disk sequence on DELL R900 with LINUX

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Thank you for your answer.

   I look your document and using "udev" to create "mydevXXX".  This device is work, but NOT what I want.  

The reason are:

1. what I want is my device sequence must:
     boot and root on /dev/sda
     swap on /dev/sdb

2. udev ONLT create a "link" from "mydevXXX" back to original.  It did NOT official change device name.  
   e.g.:
lrwxrwxrwx 1 root root 3 Jul  1 11:19 mysda -> sdc
lrwxrwxrwx 1 root root 4 Jul  1 11:19 mysda1 -> sdc1
lrwxrwxrwx 1 root root 4 Jul  1 11:19 mysda2 -> sdc2
lrwxrwxrwx 1 root root 4 Jul  1 11:19 mysda3 -> sdc3
lrwxrwxrwx 1 root root 3 Jul  1 11:19 mysdb -> sdd
lrwxrwxrwx 1 root root 4 Jul  1 11:19 mysdb1 -> sdd1
lrwxrwxrwx 1 root root 4 Jul  1 11:19 mysdb2 -> sdd2
lrwxrwxrwx 1 root root 3 Jul  1 11:19 mysdc -> sde
lrwxrwxrwx 1 root root 4 Jul  1 11:19 mysdc1 -> sde1
lrwxrwxrwx 1 root root 4 Jul  1 11:19 mysdc2 -> sde2
lrwxrwxrwx 1 root root 4 Jul  1 11:19 mysdc3 -> sde3
lrwxrwxrwx 1 root root 3 Jul  1 11:19 mysdd -> sda
lrwxrwxrwx 1 root root 4 Jul  1 11:19 mysdd1 -> sda1
lrwxrwxrwx 1 root root 3 Jul  1 11:19 mysde -> sdb
lrwxrwxrwx 1 root root 4 Jul  1 11:19 mysde1 -> sdb1

--- 09/6/30 (二),Thomas Fess <dfezz1@xxxxxxxxx> 寫道:

> 寄件者: Thomas Fess <dfezz1@xxxxxxxxx>
> 主旨: Re: How to change disk sequence on DELL R900 with LINUX
> 收件者: "General Red Hat Linux discussion list" <redhat-list@xxxxxxxxxx>
> 日期: 2009年6月30日,二,下午1:16
> 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@xxxxxxxxxxxx>
> To: redhat-list@xxxxxxxxxx
> 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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