Questions for Sonatine re:Dell HDD

[sʇןɐs ɥʇɐq ɥsıʞɹnʇ]

Tine I am attempting to reclaim my hard drive from a Dell HPA and having some difficulties, will you please help me out?

My HDD is a Seagate ST3160812A5 160g reporting 149g when fully wiped via Dban autonuke or Hdparm security erase unit.

I have had no luck with Hdparm in setting real max sectors, I consistently get an I/O error despite the drive being unfrozen with master password set. I am now trying to work with Hdat2 and still having no luck.

What's odd is Hdat2 is reporting my bios to be 8.4gigs in size, that's impossible. My Device info on Hdat2 reads like so

Source-ATA LBA28 cyl 16383 head 16 sectors 63 total 268435455 =137.44gig (I presume this is because my main partition is a little smaller than normal, I've been messing around with my partitions for various reasons)

Source LBA48 cyl ----- head ----- sectors ----- total 312500000 = 160.00gig

Source CHS cyl 16383 head 16 sectors 63 total 16434495 = 8.46gig

Source INT13H/Bios cyl 1023 head 255 sectors 63 total 16434495 = 8.41gig

EXT INT13H cyl *16383 head *16 sectors *63 total 312500000 = 160gig
(*invalid parameters)

signature and checksum ok
ATA major - 00FEh
ATA minor- not reported

Transfer mode max supported - Ultra DMA6/ATA133
Transfer mode selected - Ultra DMA5/ATA100

Firmware - 3.ADH
cache- 8.39mb
cache type- not specified
General configuration-0C5AH=0000110001011010b
Specific- C837h
Max queue depth- 32
security- supported
security- disabled
enhanced security erase- not supported
master password not supported
master password identifier revision code FFFh
HPA enabled
48bit address feature enabled
flush cache command enabled
flush cache EXT command enabled
long logical sector disabled
long physical sector disabled
streaming- not supported
INT13h support yes
EXTENDED INT13h
major/vendor/extension version 3.0/0.0/0.0
-> EDD V2.0

subset
fixed disk access yes
INT13h identify support - not detected
DMA errors handled transparently
Bits 4-6 not valid
DPTE pointer F000h:6C3Ch
Bios vender specific - 00h
PI controller- legacy and native supported
operating mode- native
Sata mode select-IDE

MBR- found 1
Boot- found 0
Table- found over 100 within 500mb and I stopped searching
DIR- none found
disk part- 3

MBR status- WARNING [1] ERROR [1]
-:> Partition entry- partition no start on head boundary, should be 0 or 1 is 32
1. partition entry end of partition=1023, actual 16804

check table- -NO CHAIN BOOT FOUND
-NO FILE SYSTEM ID FOR THIS FAT SECTOR, NO MORE TESTS POSSIBLE

I would really like to reclaim my hard drive to 160g is this possible? I believe if anyone can do it, you can.