[ale] backing up /var -POSTGRES & LABEL

[Jim]

Michael B. Trausch wrote:
>
> Labels and UUIDs are becoming more and more common as identifiers used 
> in /etc/fstab.  There are some advantages to this layout, though you 
> have to do a little more work when it comes to finding out what 
> drive/partition the filesystem is actually on.  The /good/ thing is 
> that you can have the system use FS labels or (even better) UUIDs to 
> mount filesystems, which guards them against you adding and removing 
> devices, and even in some cases, massive kernel upgrades.
>

WARNING UUIDs change!  Twice now I've had the UUID change on a partition 
when I've installed alternate OSs to different partitions on a disk.  I 
have no idea why installing a new OS would change the UUID of an 
existing partition but it did.  All of a sudden I could no longer boot 
the original Ubuntu system after installing Centos (I think), when I 
looked into it, the UUID for the Ubuntu system had changed.  I just 
reverted back to using /dev/hda5 in the /etc/fstab instead of that messy 
UUID=<some random bunch of garbage> to fix.

Jim.