upgrade 7.10 to 8.04 : IDE & SATA : device names/order

[ramora_t]

Hi all,

Since I upgraded from 7.10 to 8.04, I have 2 weird problems with my IDE & SATA disks.
First IDE devices are not labeled /dev/hdX anymore but /dev/sdX. Well it's OK I've just corrected my /etc/fstab. I've been told that it's "normal".

Secondly the device names change on every boot : the /dev/sdc becomes /dev/sdb and so on.. I have to boot twice to "correct" the problem.

This is the order I expect :

Disque /dev/sda: 250.0 Go, 250059350016 octets
255 heads, 63 sectors/track, 30401 cylinders
Units = cylindres of 16065 * 512 = 8225280 bytes
Identifiant disque: 0x000cd11e

Périphérique Amorce Début Fin Blocs Id Système
/dev/sda1 1 127 1020096 82 Linux swap / Solaris
/dev/sda2 128 6606 52042567+ 83 Linux

Disque /dev/sdb: 163.9 Go, 163928604672 octets
255 heads, 63 sectors/track, 19929 cylinders
Units = cylindres of 16065 * 512 = 8225280 bytes
Identifiant disque: 0x43569730

Périphérique Amorce Début Fin Blocs Id Système
/dev/sdb1 1 6080 48837568+ 83 Linux
/dev/sdb2 * 6081 7296 9767520 7 HPFS/NTFS
/dev/sdb3 7297 16407 73184107+ f W95 Etendu (LBA)
/dev/sdb4 16408 19929 28290465 83 Linux
/dev/sdb5 7297 16407 73184076 c W95 FAT32 (LBA)

Disque /dev/sdc: 80.0 Go, 80026361856 octets
255 heads, 63 sectors/track, 9729 cylinders
Units = cylindres of 16065 * 512 = 8225280 bytes
Identifiant disque: 0x1aa642b1

Périphérique Amorce Début Fin Blocs Id Système
/dev/sdc1 * 1 1216 9767488+ 7 HPFS/NTFS
/dev/sdc2 1217 9729 68380672+ f W95 Etendu (LBA)
/dev/sdc5 1217 9729 68380641 b W95 FAT32

Any idea ?

[Vivaldi Gloria]

Why is the device change a problem? Do you use uuids in fstab?

[zdude]

I had the same problem and I was using a /home partition that was encryted on the second drive. Big problem. I ended up using UUID everywhere there is a /dev/sdX (menu.lst, fstab, crypttab, etc) . This so far has worked, although a pain in a$$ to setup but it does work.

[ramora_t]

Hi,

Thank you for your replies.
No Vivaldi Gloria I don't use uuid. Just old style device names :
If sdb becomes sdc or whatever .. it puts a mess and the system won't boot properly.

# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
/dev/sdb4 / ext3 defaults,errors=remount-ro 0 1
/dev/sdb1 /home ext3 defaults 0 2
/dev/sda2 /externe ext3 defaults 0 2
/dev/sdc1 /media/C ntfs-3g defaults,nls=utf8,umask=007,gid=46 0
1
/dev/sdc5 /media/D vfat defaults,utf8,umask=007,gid=46 0 1
/dev/sdb2 /media/F ntfs-3g defaults,nls=utf8,umask=007,gid=46 0
1
/dev/sdb5 /media/H vfat defaults,utf8,umask=007,gid=46 0 1

[Vivaldi Gloria]

Hi,

Thank you for your replies.
No Vivaldi Gloria I don't use uuid. Just old style device names :
If sdb becomes sdc or whatever .. it puts a mess and the system won't boot properly.


You need to learn the uuids of partitions and use them in fstab. For example a line in my fstab looks like this:


UUID=425a54d6-7033-4114-b0e6-868257abd717 /mnt/misc ext3 relatime 0 2

So you put the uuids as "UUID=???" at the beginning of the line. To learn the uuids use the commands:


ls /dev/disk/* -lah
sudo blkid

Here is an fstab guide: http://ubuntuforums.org/showthread.php?&t=283131