On 06/23/2010 09:47 AM, Camaleón wrote: > On Wed, 23 Jun 2010 09:40:22 +0100, Alan Chandler wrote: >> I feel I should move my entire /etc/fstab over to using uuids > > Mmm... any strong reason for doing that? :-)
Whether or not these are his reasons, I can tell you why that is a wise
move. UUIDs are unique to the device/filesystem. The major advantage of
using UUIDs is that you don't have to worry about reordering of disks by
the kernel when it sees it in a different order than previous.
> I'm with Lenny and the old naming method ("/dev/sdx") is the default for
> "/etc/fstab".
This isn't recommended, because if the Linux kernel developers change
drivers, and the drives become a new device (just as it happened when
ditching the PATA driver for SATA, and /dev/hda became /dev/sda), your
partitions/volumes won't mount. Instead, you should either be using
LABELs or UUIDs.
>> if I look in /dev/disk/by-id I can locate the following
>> and in /dev/disk/by-uuid (again excuse the word wrap)
>>
>> lrwxrwxrwx 1 root root 10 Jun 21 19:20
>> f3408fda-0649-414f-8446-c01cf4e07558 -> ../../dm-0
>>
>> There seems to be no correspondence between them
If you're running LVM2, then you need to be familiar with the LVM
commands. In particular, lvdisplay:
# lvdisplay
--- Logical volume ---
LV Name /dev/work/root
VG Name work
LV UUID M5qcO0-CEBb-rn7M-tm2o-pgII-0HmE-LNuSW9
LV Write Access read/write
LV Status available
# open 1
LV Size 18.80 GiB
Current LE 4813
Segments 2
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:0
--
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