[Discussion] Hard Drive Partition Sizes

[Thomas Clayton]

I went looking through the Les Bell site after reply and have found SEVERAL other pertinent pages. One is

http://www.lesbell.com.au/hpfstest.html

another is

http://www.lesbell.com.au/Home.nsf/e13d28c7fa3133464a2569250040c56b/0739edb5d1335bce4a2565e9000b0028?OpenDocument

That MAY not BE correct URL. hmmm. Anyway, THANKS AGAIN!

Tom Clayton


--- On Wed, 3/3/10, Dave Yeo <daveryeo at telus.net> wrote:

> From: Dave Yeo <daveryeo at telus.net>
> Subject: Re: [Discussion] Hard Drive Partition Sizes
> To: "POSSI Discussion List" <discussion at lists.possi.org>
> Date: Wednesday, March 3, 2010, 9:42 PM
> On 03/01/10 11:01 pm, Thomas Clayton
> wrote:
> > Dave:
> > 
> > --- On Tue, 3/2/10, Dave Yeo<daveryeo at telus.net> 
> wrote:
> > ...<  snip>  ...
> >> 
> >> Current OS/2 versions are limited to 64 GBs.
> Presumably the
> >> Linux
> >> version could be adapted to larger.
> >> Also HPFS has that 2 GB file size limit.
> >> 
> >> Dave
> > 
> > If you re-check my first letter, at the beginning of
> the quote from
> > Jan van Wijk, he says
> > "FS-size upto 2 terabyte (2048 GiB) by design"
> > .
> > While YOU may be correct, I think HE is saying 2 TB
> for a single file!
> > (Yes. I know. Seemingly UNbelievable.
> >   It IS hard for ME to believe, too!)
> > 
> 
> This got me thinking and vaguely remembering a workaround
> (actually undocumented call) for large file support,
> probably HPFS specific.
> This page contains a copy of Design goals and
> implementation of the new High Performance File System from
> Microsoft Systems Journal, http://pages.cs.wisc.edu/~bolo/shipyard/hpfs.html which
> is interesting. It also states that there is no limit to
> file size on HPFS besides the partition limit though with
> the current implementation it would not be very efficient.
> This page explains that it is an OS/2 limitation that
> limits the filesize to 2 GB though as Bob mentioned OS/2
> 4.5+ includes 64 bit versions of the API to deal with very
> large files. http://www.lesbell.com.au/hpfsfaq.html#FILESIZE
> It also mentions the hidden API which allows using sectors
> instead of bytes for addressing. This would mean the program
> is responsible for managing much more of the file structure
> then usual but should in theory allow for 1 TB files if my
> math is right
> Dave
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