10-27-2011
The system will not keep sda as my boot drive
Hi everyone!
A very frustrating night!!! I installed a new linux server on my system that has IDE drives and SATA drives. At the time of installation I only had IDE drive plugged in and that is where I install the linux. Everything works fine until I shut the system down and plug in my SATA backup drive. During boot, kernel panic appears and the system will not boot! My backup drive appears to be sda now!!!! And of course since my fstab has sda1 listed as the root partition it fails. I know you can assign certain drives using udev, but this happens before the system even boots.
The real question is, and I have been trying to find it all over the net and I am very surprised that nobody has even asked, and that is:
How can I keep my sda to be ALWAYS that IDE drive? Just like in the good old days when hda was always hda and as long as it is connected to the first IDE controller and it is the first drive it will always be hda and nothing else. This sda, sdb issue is really very frustrating, or I am missing something here?
Please help!!!!
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HD(4) Linux Programmer's Manual HD(4)
NAME
hd - MFM/IDE hard disk devices
DESCRIPTION
The hd* devices are block devices to access MFM/IDE hard disk drives in raw mode. The master drive on the primary IDE controller (major
device number 3) is hda; the slave drive is hdb. The master drive of the second controller (major device number 22) is hdc and the slave
hdd.
General IDE block device names have the form hdX, or hdXP, where X is a letter denoting the physical drive, and P is a number denoting the
partition on that physical drive. The first form, hdX, is used to address the whole drive. Partition numbers are assigned in the order
the partitions are discovered, and only nonempty, nonextended partitions get a number. However, partition numbers 1-4 are given to the
four partitions described in the MBR (the "primary" partitions), regardless of whether they are unused or extended. Thus, the first logi-
cal partition will be hdX5. Both DOS-type partitioning and BSD-disklabel partitioning are supported. You can have at most 63 partitions
on an IDE disk.
For example, /dev/hda refers to all of the first IDE drive in the system; and /dev/hdb3 refers to the third DOS "primary" partition on the
second one.
They are typically created by:
mknod -m 660 /dev/hda b 3 0
mknod -m 660 /dev/hda1 b 3 1
mknod -m 660 /dev/hda2 b 3 2
...
mknod -m 660 /dev/hda8 b 3 8
mknod -m 660 /dev/hdb b 3 64
mknod -m 660 /dev/hdb1 b 3 65
mknod -m 660 /dev/hdb2 b 3 66
...
mknod -m 660 /dev/hdb8 b 3 72
chown root:disk /dev/hd*
FILES
/dev/hd*
SEE ALSO
chown(1), mknod(1), sd(4), mount(8)
COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 1992-12-17 HD(4)