Mounting HD
 

is there a way that i can mount a HD, which has not been mounted, using Slax and then check for errors or format the HD (is there a format feature with *nix systems) or run e2fsck or fsck on it ??

TIA

Once logged into Slax system just mount your partition with mount command like
mount /dev/hda1 /mnt/hd

Now for format the drive you don't have to mount it
The commands depend on what type of filesystem you want to work with, is it e2fs ?

usually to format a disk you use
mkfs.[filesystem] [device]
reiserfs uses mkreiserfs