Date: Sun, 23 Jan 2005 23:16:59 -0000
From: "Nick Schiller" <[EMAIL PROTECTED]>
Subject: RE: [LIB] Disc Size - Maximum?

Philip

Thanks (and for the typo correction)

Nick Schiller



-----Original Message-----
From: Philip Nienhuis [mailto:[EMAIL PROTECTED]
Sent: 23 January 2005 23:14
To: Libretto
Subject: Re: [LIB] Disc Size - Maximum?

Date: Mon, 24 Jan 2005 00:13:19 +0100
From: Philip Nienhuis <[EMAIL PROTECTED]>
Subject: Re: [LIB] Disc Size - Maximum?

Nick Schiller wrote:
>
> Date: Sun, 23 Jan 2005 19:25:54 -0000
> From: "Nick Schiller" <[EMAIL PROTECTED]>
> Subject: RE: [LIB] Disc Size - Maximum?
>
> Matt/John
>
> I have read this exchange with interest - but some bewilderment
>
> I am a reasonably capable PC user but by no means an IT Engineer.  I
simply
> want to run a big disc in my little libretto.  From what I can understand
> there is no issue with putting a nice big disc in under either W2K or XP.
> However, the hibernation does seem to be an issue.
>
> I can understand the logic of what is being described but have no real
> understanding of how to implement it on a disc - could either of you
provide
> an idiots guide to setting up a new disc in a Libretto CT110, 64Mb,
266Mhz -

233 Mhz :-)

> it would be very much appreciated!!!!

Search the archives,
http://www.technoir.nu/libretto/list/

or peek at my Windows page,
http://home.hccnet.nl/pr.nienhuis/Windows.html
(be careful with numbers, I should update the page soon)

Philip


> Nick Schiller
>
> -----Original Message-----
> From: Philip Nienhuis [mailto:[EMAIL PROTECTED]
> Sent: 23 January 2005 19:00
> To: Libretto
> Subject: Re: [LIB] Disc Size - Maximum?
>
> Date: Sun, 23 Jan 2005 19:59:18 +0100
> From: Philip Nienhuis <[EMAIL PROTECTED]>
> Subject: Re: [LIB] Disc Size - Maximum?
>
> John Musielewicz wrote:
> >
> > Date: Sun, 23 Jan 2005 00:09:16 -0800 (PST)
> > From: John Musielewicz <[EMAIL PROTECTED]>
> > Subject: Re: [LIB] Disc Size - Maximum?
> >
> > hi matt
> >
> > umm matt the bios sees a drive over 8Gig as a 8 gig
> > drive so it'll write on the end of the drive. it sees
> > the whole drive like this
> >
> > |-----------------bios=8GB---------------------------|
> >  |-------------Operating system=greater
> > 8GB-----------|
> >
> > so figure looking at the drawing above the end or the
> > drive is to the right the bios will write it at the
> > end and the os will write it at the end if you set it
> > up that way of course. now many people will say
> > differant but I let you in on a little secret. I am
>
> Once I was thinking exactly these same thoughts, after I was informed by
> Wilm Bockey that the BIOS hibernation stuff indeed uses the int13
> extensions - IOW the BIOS hibernation routines would have no problem at
> all writing the memory image to the real end of the disk.
>
> But then ....
>
> (1) a number of people who ignored the location of the hibernation area
> around the 8 GB barrier have reported serious data loss;
>
> (2) a number of people simply tested where the BIOS dumps the memory
> image using files with special patterns and found it to be around 8 GB;
>
> (until further info comes along I perceive these as simple facts)
>
> and some further thinking yielded:
>
> (3) There is no specially designated hibernation area mentioned in the
> MBR or EMBR. Without it, how would BIOS hibernation be able to deduce
> where the end of the disk is...? The only available alternative outside
> the OS is to use the crippled disk size reporting function of the BIOS
> itself. And that can only see max. 8 GB...
> You can check that yourself using a simple DOS assembly prog to involve
> int13 subfunc 48h; it reports disk size by CHS parameters (implying 1024
> cyl limit) rather than number of sectors (cf. to LBA).
>
> > kind of a computer god if I can stay awake long enough
>
> Yes your USB info a while ago was indeed divine :-)
>
> > to let the others finish telling me why it WON't work
> > and then me doing it the way I said just to go home
> > and get away from the m***ns. Now you can use a drive
> > overlay if you want and it'll change things kinda but
> > not really for a couple reasons..1 the drive overlay
> > will force you to write he hibernation partition at
> > the 8GB barrier (which is no barrier for the OS or
> > bios by the way that is just hype) because the bios
> > will use the overlay. but why would you want to use an
>
> ??
> I always thought an overlay replaces the hard disk
> routines of the BIOS (it catches int14/15 IRQs)
>
> > overlay to begin with? you have to sit there and count
> > silly things like sectors and cylinders and other odd
> > things that are only fun if your explaining them to a
> > cute girl:) and want to impress her with what a brain
> > you have. The easy thing is really to do what you
> :
> ...<lot of interesting stuff snipped...>
>
> P.



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