You might find some information from IBM at 
http://service.boulder.ibm.com/storage/hddtech/ibmftool_userguide.pdf , 
although this may be a strictly ATA disk utility.  Searching for clip in 
the Ultrastar 36LZX spec comes up with the SCSI command to change the drive 
size but I don't know how you would send that command to the drive...

http://www-3.ibm.com/storage/hdd/tech/techlib.nsf/techdocs/85256AB8006A31E587256A9D006E3320/$file/ddys_spw.pdf


At 11:04 AM 10/15/2002 -0500, Lista de NetBSD Users wrote:
>On Tue, 15 Oct 2002, Jasper Wallace wrote:
>
> > > ahc1 at pci0 dev 9 function 0
> > > ahc1: interrupting at irq 11
> > > ahc1: aic7880 Wide Channel A, SCSI Id=7, 16/255 SCBs
> > > scsibus0 at ahc1: 16 targets, 8 luns per target
> > > [...]
> > > sd0 at scsibus0 target 5 lun 0: <IBM, DDYS-T36950N, S93E> SCSI3 
> 0/direct fixed
> > > sd0: 32768 MB, 15110 cyl, 12 head, 370 sec, 512 bytes/sect x 67108864 
> sectors
> > >      ^^^^^                         ^^^                       ^^^^^^^^
> > > sd0: sync (50.0ns offset 8), 16-bit (40.000MB/s) transfers, tagged 
> queueing
> >
> > > sd1 at scsibus0 target 6 lun 0: <IBM, DDYS-T36950N, S96H> SCSI3 
> 0/direct fixed
> > > sd1: 35003 MB, 15110 cyl, 12 head, 395 sec, 512 bytes/sect x 71687340 
> sectors
> > >      ^^^^^                         ^^^                       ^^^^^^^^
> > > sd1: sync (50.0ns offset 8), 16-bit (40.000MB/s) transfers, tagged 
> queueing
> >
> > FWIW i have a:
> >
> > sd2 at scsibus0 target 3 lun 0: <IBM, DDYS-T36950M, S93E> SCSI3 
> 0/direct fixed
> > sd2: 35003 MB, 15110 cyl, 12 head, 395 sec, 512 bytes/sect x 71687340 
> sectors
> >
> > My money is on the 32Gb clip jumper being set, as Cliff Albert mentioned.
>
>Thanks, Jasper.
>
>I have checked the 250 pag manual of the disk and I cant find info about
>such jumper, except J6 pins 13 and 14 that are reserved. Also i have
>checked the printed circuit board with my magnifying glass and I couldnt
>find more jumpers.
>
>Do you remember if such jumper says explicity "32GB" or something like
>that?.
>
>Also a favor, Jasper, Please.
>Could you send me a copy of some bytes of your hard disk?
>
>dd if=/dev/rsdXd of=myfile.bin bs=64k count=100
>
>I would like compare it with the same area of my hard disk.
>(I recognize i dont know exactly if these can help)
>
>Thanks a lot
>
>Heron Gallegos