I am a bit confused about the /dev/sda* references since I installed Wheezy instead of Squeeze on a testing box.

fdisk -l returns:

Disk /dev/sda: 250.1 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders, total 488397168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000e9623

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048   480278527   240138240   83  Linux
/dev/sda2       480280574   488396799     4058113    5  Extended
/dev/sda5       480280576   488396799     4058112   82  Linux swap / Solaris

This seems correct. But df -h /dev/sda (and /dev/sda1 and /dev/sda2 and /dev/sda5) returns:

Filesystem      Size  Used Avail Use% Mounted on
udev             10M     0   10M   0% /dev

The same happens with every entry under /dev/disk/by-id and /dev/disk/by-path. Only one of two entries under /dev/disk/by-uuid returns the correct volume size:

df -h /dev/disk/by-uuid/cacdbad6-7e6b-4e80-84ba-e3c77ef48796
Filesystem                                              Size  Used Avail Use% Mounted on
/dev/disk/by-uuid/cacdbad6-7e6b-4e80-84ba-e3c77ef48796  229G   22G  196G  11% /

Contents of /etc/fstab:

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda1 during installation
UUID=cacdbad6-7e6b-4e80-84ba-e3c77ef48796 /               ext4    errors=remount-ro 0       1
# swap was on /dev/sda5 during installation
UUID=45840d13-ee36-4e77-8e73-16cbdff25eb1 none            swap    sw              0       0
/dev/sr0        /media/cdrom0   udf,iso9660 user,noauto     0       0
/dev/fd0        /media/floppy0  auto    rw,user,noauto  0       0

It seems all other references than the uuid points to the swap partition. Is this because Wheezy is in testing, and should it be reported as an error?