Used swap 0MB of 0MB - why? [solved]

[Duncan Lithgow]

>Duncan,
>that says the partition hda6 is not defined.
>
>try "fdisk -l /dev/hda" and see what partitons are defined.
>If one of those is listed as type 82 linux swap, then that would be the
>name you would use in the mkswap and swapon commands.
>if no partitions are defined as type 82 swap then you cannot make swap
>available until you have a suitable partition to do so.
>  
>
Ok it worked. "fdisk - l" told me that "/dev/hda7" was linux swap type 
82 (I already knew that). "swapon /dev/hda7" didn't because the device 
was busy. So I logged out and in again as a a failsafe x-windows 
terminal - and voila "mkswap /dev/hda7" works.

Is this really mostly because I restarted my system so that the new 
fstab refering to the correct hda7 not hda6 was loaded? That's my 
current guess.

Thanks all for the help, Duncan