🚀 go-pugleaf

"Tpsa" <root@fbatut.com.pl> wrote:

>
>User AWP <nomail@thanks.com.au> wrote in message
>3978584a$0$11168$7f31c96c@news01.syd.optusnet.com.au...
>> > >> An Award BIOS with MODE set to AUTO will attempt
>> > >> to determine the translation from the partition table.
>>
>>
>> How does it detect a drive with no partitions and no formatting?
>>
>>
>>
>>
>
>Yeah, I'm currently working on a custom OS, and it uses a diffrent
>filesysem - and the bios (AWARD 4.51 PG) detects
>the disk correctly!

Hmmm, I didn't say, rather didn't mean to say that the partition table was
used *solely* in the determination of the Translation method used, but
rather, a partition table *effected* how this translation was determined.

A simple example of this is if you create a partition, say the first
partition table entry, manually choosing CHS mode in the BIOS. Once created,
change the BIOS to "Auto". Now what does the BIOS report ?

Second senario. Continuing on from above, Change the BIOS to use "Large",
now create a second partition table entry (might have to use a third party
util to do this), then change the BIOS to "Auto" once again. What does it
report this time ?

Wether or not the BIOS then contains a bug from either of these points on,
would be dependant upon the brand and version of the BIOS. The effect that I
was suggesting, was when *a* "bug" confused simple programs like the DOS
mode FDISK and FORMAT programs, which use BIOS 13h services.

As for "recalibrations", if I make request for a sector beyond a certain
range, some drives will indeed perform a "Recal". So, if you trigger and bug
in the BIOS 13h service(s), and this bug in turn incorrectly creates a large
or negative LBA request, when that command finally makes it to the hard
disk, some drive will "recal".

  __   __  ________________________________________________________
 //)) //))| Richard RUDEK. MicroDek. Chatswood, Sydney. Australia. |
//\\ //\\ |http://microdek.homepage.com/                           |
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