swap not mounted after repartitioning

[Hans Gerd Evertz]

Ubuntu 6.10

I repartitioned my disk with gparted.
Noted that my notebook (only 256MB RAM) became much slower and
"swapped" a lot.
Found that the swap partition was no longer active ("top" returned zero swap size).

"swapon -a" returned error message
swapon: cannot stat /dev/disk/by-uuid/a0119d95-45e9-4935-acce-d07b331db03c: No such file or directory

Found hint on http://ubuntuforums.org/archive/index.php/t-93131.html ,
namely I commented away the uuid-line from fstab and added
  /dev/hda3 none swap defaults 0 0
followed by "mount -a"

Swap seems to work now. There is some error message upon waking up from hibernate
which I cannot read
(N.B.: and I do not know how to read the error log and cannot spend still more
time to find out -- there should be a man-page or such on reading error logs)

Bottom line: repartioning the disk causes fstab to fail: This must not happen !

----------------------------------------------------------------------
Another comment: Why in the wolrd is there a "UUID" now in fstab ?
This looks like a really bad hack, requiring specific numbers where symbolic names like /dev/hda1
are appropriate. Some comment from the net:
"UUID must rank as one of the butt-ugliest new 'features'. It makes the once simple fstab almost impossible to read and is causing all sorts of support ..."

[David Greaves (david-dgreaves)]

I just upgraded to Intrepid.

Hibernate failed in Hardy and I wanted to see if it was fixed.
It wasn't.
It turns out I'd added more RAM and nothing noticed that swap was smaller than RAM.

I used gparted to resize the swap. That went smoothly. I did swapoff/resize/swapon from inside gparted.

Then when I rebooted I had no swap.

gparted did not update fstab with the UUID (or it changed the UUID)

[Tormod Volden (tormodvolden)]

David, that gparted changes the UUID when "resizing" the swap is reported in bug #302534.

Hans, it's unclear from your description what exactly happened to your swap partition. Did you resize it, or did you create a new one?

An alternative to UUID is to use disk labels. This is a bit more robust in some cases, but does not provide the "uniqueness" of an UUID.

[Curtis Gedak (gedakc)]

GParted 0.4.4 has just been released. It includes a bug fix to maintain the same UUID and LABEL when resizing a swap partition.

See GParted Bug:
http://bugzilla.gnome.org/show_bug.cgi?id=575585