[BALU] BIOS and Logical Block Addressing

Jim Vines jgoodguy at charter.net
Mon Jun 18 14:29:42 CDT 2007


This MB is limited to 128GB, if I am reading the manual LBA wiki correctly.

"LBA addresses in ATA can be 28-bit or 48-bit (introduced in ATA-6) 
wide, which results in a disk size limit of 128 GiB 
<http://en.wikipedia.org/wiki/Gibibyte> or 128 PiB 
<http://en.wikipedia.org/wiki/Pebibyte>, respectively, assuming the 
common 512 bytes per sector."  
http://en.wikipedia.org/wiki/Logical_block_addressing

The online ASUS manual says that 28-bit LBA is used for on that board. 

Jim







Jeff Scarborough wrote:
> I'm at work at the moment so going from memory but the MB is Asus
> P4S333.  As I stated I did look at the BIOS info on the ASUS site but
> I did not see any of the BIOS updates that indicated it would help
> with large drives.
>
> The drive that was purchased is a Western Digital 320 gig
>
> Jeff
>
> On 6/18/07, Jim Vines <jgoodguy at charter.net> wrote:
>> What MB, by the way and what HD.
>>
>> Jim
>>
>> Jeff Scarborough wrote:
>> > Hello All,
>> >
>> > I have ran across a problem and hope someone could help.  My in-laws
>> > computer recently stopped booting.  So we tried to replace the hard
>> > drive on the system.  When I attempted to install XP (sorry but they
>> > would not go with Linux) we ran into a problem.  After the
>> > instillation, the computer would not boot.  Then I tried to install
>> > Linux and when I tried to boot the system the GRUB system gave an
>> > "error 18".
>> >
>> > Now I may be wrong but as I understand what is happening is that the
>> > MB on the computer is a few years old and so uses the logical block
>> > addressing scheme.  My theory is that the software is loading but when
>> > the system boots up it only "sees" a portion of the hard drive and
>> > thus can not boot up.  At this point I assume that part of the boot
>> > information is in a portion of the hard drive "invisible" to the BIOS.
>> >
>> > Some places on the net say that with LBA the drive could not be larger
>> > than 8 gigs but on wikipedia it said the drive would have to be
>> > limited to 128 gigs.
>> >
>> > When booting up the computer part of the POST screen gives the size of
>> > primary as 8455 megs.
>> >
>> > I have looked at the Asus website and they do have updated BIOS but I
>> > have not seen any information that this would actually correct the
>> > problem and I would prefer not to update the BIOS unless I had to see
>> > as I could mess up a whole lot more.
>> >
>> > And at the moment I not sure of the best course of action.  If anyone
>> > has any idea about how I can get XP onto the machine that would be
>> > very helpful.
>> >
>> > Jeff
>> > _______________________________________________
>> > Members mailing list
>> > Members at lists.bham-lug.org
>> > http://lists.bham-lug.org/cgi-bin/mailman/listinfo/members
>> >
>>
>> _______________________________________________
>> Members mailing list
>> Members at lists.bham-lug.org
>> http://lists.bham-lug.org/cgi-bin/mailman/listinfo/members
>>
> _______________________________________________
> Members mailing list
> Members at lists.bham-lug.org
> http://lists.bham-lug.org/cgi-bin/mailman/listinfo/members
>




More information about the Members mailing list