🚀 go-pugleaf

S_TITZ@iravcl.ira.uka.de (Olaf Titz) writes:

> >  floppy, then by using BIOS calls (specifically int26, Absolute disk write)

> Sorry, but I think this is wrong. int25/26 do not work without the
> disk properly configured, as they need the disk geometry as background

Indeed, if the BIOS is not told that the disk exists (and is properly
configured), then it will not be able to access the disk. BTW, INT
25h/26h are DOS interrupts, not BIOS. BIOS uses INT 13h, but even this
will not be able to access a disk which is not properly installed.

> >  	If there is data you want on the disk, then you might try reading
> >  the first few sectors (with int25) to get the partition table and then
> >  write a valid partition table from another drive on a working machine onto
> >  the broken drive again using int26.

> I'm not absolutely sure, but I think that you can't access the
> partition table with int25, only the logical drives.

You are right, the master boot sector (where the partition table
resides) CANNOT be accessed with INT 25h. You need INT 13h for that.

To the original poster: I initially thought that you want just to
remove the password protection (wihout losing any data). If you don't
care about the contents of the disk and are ready to accept its lost,
just drop me a message and I'll explain you what to do, in order to
get the hard disk working again.

Regards,
Vesselin
-- 
Vesselin Vladimirov Bontchev          Virus Test Center, University of Hamburg
Tel.:+49-40-54715-224, Fax: +49-40-54715-226      Fachbereich Informatik - AGN
< PGP 2.0 public key available on request. > Vogt-Koelln-Strasse 30, rm. 107 C
e-mail: bontchev@fbihh.informatik.uni-hamburg.de    D-2000 Hamburg 54, Germany