Bernhard Auzinger wrote:
Am Montag 12 März 2007 schrieb Marcus D. Hanwell:
On Monday 12 March 2007 17:00:09 Bob Sanders wrote:
P.V.Anthony, mused, then expounded:
Currently in the fstab the boot and root partitions are set and working
great. Once a new sata drive connected, the drive assignments change.
Initially the / (root) is /dev/sda2. Once another sata drive is added
the / (root) becomes say /dev/sdb2.
Is there any way that this can be fixed even when more drives are added
or removed?
Typically, on the same controller, the lowest numbered port becomes the
first drive. The description of the symptom leads me to believe that
your /dev/sda drive is attached to port 2 instead of being attached to
port 1. Have you tried moving your SATA cable to a different port?
I had the same problem and despite my existing drive being connected to
what was labelled on the motherboard as SATA1 it in fact was not! Trial and
error gave me the correct one... It would be useful if the nodes were more
fixed but most systems do not change after initial set up and this
situation can be fixed quite easily.
Another way would be to use udev and the partitions uuid to mount the
partition.
With
-> udevinfo --query=all --root --name sdb2 | grep uuid
you get the uuid of the partition (in this case sda1). The output looks like:
-> S: disk/by-uuid/24034503-e89e-4e6d-96b6-5dbc2e9b83cf
Then you can mount the drive by simply typing (with the output that gives you
the command above on your machine)
-> mount UUID=24034503-e89e-4e6d-96b6-5dbc2e9b83cf /mnt_point
or adding a line like
-> UUID=3f465a84-8eac-4207-aeb6-b9178329af4f /mnt_point your_fs your_opts 0 2
to your fstab
With this solution the drives(partitions) should always be mounted at the same
mount point, no matter at which controller it is attached physically.
rgds
Bernhard
Thanks to all who have responded to this email. The information sent
have solved my problems with the sata drives. I am very happy.
For the record, I have used the above solution and it is working great.
I hope one day grub will allow "root=UUID=something" then the problem is
completely solved.
I am very happy. Thank you all very much for helping.
P.V.Anthony
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