CentOS 4.6 x86_64, Dell PE2950 with DRAC5, onboard SAS RAID 1, 2 arrays.
After booting installed system, /dev/sda exists but does not appear to be a hard disk. fdisk -l displays nothing for sda. CentOS is on /dev/sdb and the second RAID 1 array is now /dev/sdc.
It's been suggested (in the Dell Linux mailing list) that it is related to the virtual CD device of the DRAC. But why would it change after install? Is it perhaps a difference in drivers that are available in the installer vs. the live kernel?
How can I find out what /dev/sda is? Any way to force the drive order from the CentOS side? No relevant options that I have found in BIOS or RAID setup.
bash-3.00# ls -l /dev/sd* brw-rw---- 1 root disk 8, 0 Apr 29 05:15 /dev/sda brw-rw---- 1 root disk 8, 16 Apr 29 05:15 /dev/sdb brw-rw---- 1 root disk 8, 17 Apr 29 05:15 /dev/sdb1 brw-rw---- 1 root disk 8, 18 Apr 29 05:15 /dev/sdb2 brw-rw---- 1 root disk 8, 19 Apr 29 05:15 /dev/sdb3 brw-rw---- 1 root disk 8, 32 Apr 29 05:15 /dev/sdc
/dev/cdrom points at /dev/hda
mount /dev/sda /mnt yeilds 'No medium found'
When virtual CD media is connected via DRAC, it is found at /dev/cdrom1 which links to /dev/scd0
It's been suggested (in the Dell Linux mailing list) that it is related to the virtual CD device of the DRAC.
As far as I know, it is. I recall something about it emulating a usb drive so it could be hot plugged with a new "disc" if you will.
But why would it change after install? Is it perhaps a difference in drivers that are available in the installer vs. the live kernel?
How did you install out of curiosity?
How can I find out what /dev/sda is? Any way to force the drive order from the CentOS side? No relevant options that I have found in BIOS or RAID setup.
What info do you get when you cat some of the /sys/block/sd{a b}/ files after its booted?
jlc
On Thu, May 1, 2008 at 12:51 AM, Joseph L. Casale jcasale@activenetwerx.com wrote:
It's been suggested (in the Dell Linux mailing list) that it is related to the virtual CD device of the DRAC.
As far as I know, it is. I recall something about it emulating a usb drive so it could be hot plugged with a new "disc" if you will.
But why would it change after install? Is it perhaps a difference in drivers that are available in the installer vs. the live kernel?
How did you install out of curiosity?
DRAC Virtual CD (full CentOS disk 1 of 4) in one instance, Virtual CD with http install in another.
How can I find out what /dev/sda is? Any way to force the drive order from the CentOS side? No relevant options that I have found in BIOS or RAID setup.
What info do you get when you cat some of the /sys/block/sd{a b}/ files after its booted?
removable = 1, size = 0 among others.
jlc _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
-
Jeff Larsen -
Joseph L. Casale