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Getting disks to mount on the same mount points every time not a concern with IDE disks, but once you start using USB disks you run the risk of them being enumerated in a different order...................which means a disk that was /dev/sdb1 this time round could be /dev/sdd1 next time. If you want the disks to always use the same mount point the simplest way is to mount them by UUID. All my disks are formatted ext3, and I have no idea if it works with other filesystems......but then filesystems not designed by wife-killers probably have less bugs anyway. 
Firstly to work out what the UUID of your disk is in the first place look at /dev/disk/by-uuid: cianer@Detritus:/dev/disk/by-uuid$ ls -la
total 0
drwxr-xr-x 2 root root 120 2009-07-04 01:16 .
drwxr-xr-x 6 root root 120 2009-07-04 01:16 ..
lrwxrwxrwx 1 root root 10 2009-07-04 01:16 12f82c6b-d11f-4635-9bdb-bab557919879 -> ../../sdc1
lrwxrwxrwx 1 root root 10 2009-07-04 01:16 56566b53-cce6-470c-8676-ce0f1bb1af76 -> ../../sda1
lrwxrwxrwx 1 root root 10 2009-07-04 01:16 7aed29cf-a525-43f1-9d63-65591154a6b1 -> ../../sda5
lrwxrwxrwx 1 root root 10 2009-07-04 01:16 dc5040bd-0b0d-4edf-9bec-cea6b73a8774 -> ../../sdb1
cianer@Detritus:/dev/disk/by-uuid$ This tells you the UUID of the disks and which device they currently are. Mount them in turn & see what content is on them so you know which disk is which. Next, simply edit your /etc/fstab to use the UUID, thus: cianer@Detritus:~$ more /etc/fstab
# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# OS disk - no data
UUID=56566b53-cce6-470c-8676-ce0f1bb1af76 / ext3 relatime,errors=remount-ro 0 1
# Swap
UUID=7aed29cf-a525-43f1-9d63-65591154a6b1 none swap sw 0 0
# Primary storage drive
UUID=b4bf964e-cfa6-43a3-9409-723302de2cca /media/shared auto defaults,users,auto 0 1
# Secondary storage drive
UUID=dc5040bd-0b0d-4edf-9bec-cea6b73a8774 /media/videos auto defaults,users,auto 0 1
# External 1TB USB backup disk
UUID=12f82c6b-d11f-4635-9bdb-bab557919879 /media/backup_disk auto defaults,users,auto 0 1
/dev/scd0 /media/cdrom0 udf,iso9660 user,noauto,exec,utf8 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0
cianer@Detritus:~$
Ta daa! Now you don't have to worry about the USB enumeration screwing up your disk order and having your nightly backups trash your data by backing up to the wrong place. |
