Trying to install backtack

[locken]

on the installation page they installing it to a usb disk but i want to installit on hda1
http://www.offensive-security.com/do...hd-install.pdf

i made partition as in the text but from hda1 not /sda

so now i got
device boot start end blocks id system
/dev/hda1p1 * 1 7 56196 83 linux
/dev/hda1p2 8 70 506047+ 82 linux swap
/dev/hda1p3 71 19455 155710012+ 83 linux

when i press w in fdisk for wrigt then this error message come
Re-reading the partition table failed whith error 22: ingvalid argumen.
the kernel still uses the old table
the new table will be used at next reboot
syncing disks

then i reboot
when i checked i still had all 3 disks

so long evrything is good, but when to
BT ~ # mkfs.ext3 /dev/hda1 = working fine
and
BT ~ # mkfs.ext3 /dev/hda3 "ther is no hda3" then i try hda1p3 "do not exsist.

help wanted

[devils casper]

Hi and Welcome !

Post the output of fdisk -l command here.
You can use Parted Magic LiveCd to create Partitions. It has Graphical Interface and its one of the best Partition Manager.