William R. Walsh wrote:
> I realize it's been ~4 years, and the only explanation I have is that I was
> feeling nostalgic, remembering better times in alt.sys.pc-clone.compaq,
> wandering through the Google Groups archives when the subject of one of your
> messages struck me as interesting. On November 2nd, 2004 at 8:17 PM, you
> wrote:
>
>> Opened up the chassis and saw a Western Digital WD400BB disk drive in it.
>> Looked up the specs at the WD web site. Yep. 40GB. Great! More than
>> I'd bargained for.
>
>> The BIOS reported the drive manufacturer and model correctly, but
>> showed the capacity as 10GB.
>
> Well, the same thing happened to me with an Evo D500 P4 I bought a few weeks
> ago. It came to me sporting a Maxtor 6E040L0 "Diamondcrash" (so-called
> because that's what every one of those things I've run into--including two I
> bought new!--have done) drive.
>
> Now, I know these are a 40GB drive. But this one only shows up in the BIOS
> as 20GB, and sure enough, it's got a sticker placed over the real capacity
> that shows it to be a 20GB drive. I know better than that.
>
> Quick look around, time to make sure nobody's watching. It's only a Maxtor
> drive, so I don't care if I diddle it in some interestingly fatal manner. I
> whipped out a copy of HDAT2 and sure enough...the weasels at HP have set an
> HPA that divides the drive right in half!
>
> What's more, the Compaq BIOS Will Not Allow Any Diddling With The HPA. It
> not only locks that out, but also blocks any attempt to send the in-drive
> secure erase command. That was easy to work around--HDAT2 suggested booting
> the system with the drive unplugged from the data cable at first...after
> which I'd plug the cable in (how's that for trying?) and run HDAT2. It
> worked. I now have a full 40GB paperweight. I will not dare trust this drive
> or even use it although it does presently work. Too many bad experiences
> with previous examples of the same thing...which was outstandingly bad even
> by Maxtor standards.
>
> Perhaps you don't have the system any more, perhaps you already know this,
> perhaps you don't care...but what I really wondered about was this comment
> that showed up later in the thread:
>
>> Pretty much what I've concluded, especially given that the DeskPro SFF
>> BIOS also seeems quite limited in its BIOS hard drive capacity
>
> What was the limit...do you remember? I'm curious to know. I know I've run
> up to 120GB drives on mine, and more than that once (320GB) Windows 2000 had
> taken over from the BIOS and removed the 48-bit LBA limit. Most of the
> machines I've got still have whatever BIOS they came from the factory
> with...
>
> William (computer/Usenet historian extraordinaire)
>
>
William,
My suspicion is that the Compaq SSF has a BIOS limit of 132GB, another
in the long parade of hard-coded BIOS limitations this industry has
seen, starting with 528MB on 386/486 systems. I actually still have a
couple of the Compaq P3 SSF systems here. It is time to put them in the
hands of my local exporter of old computers and get maybe $20 apiece.
AFAIK, Compaq is the only name-brand mfr that imposed on its hard drive
vendors to limit the capacity of a drive at the factory. I suspect this
has a lot to do with government contracts, and if you have to meet the
letter of a govt contract, you WILL meet the letter. Never mind if you
have a replacement part that is better than original. So a 20GB
replacement drive MUST have 20GB capacity to satisfy the federal
procurement weenies.
I'm with you on Maxtors. Every so often, I gather out 5 or 6 and sell
them quickly on eBay. I don't even want to give them to my enemies.
.... Ben Myers
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