[iyonix-support] Re: 2nd harddrive problems

  • From: Chris Evans <chris@xxxxxxxxxxxxxxx>
  • To: iyonix-support@xxxxxxxxxxxxx
  • Date: Wed, 7 Mar 2007 09:53:04 +0000 (GMT)

On Wed 07 Mar, David J. Ruck wrote:
> Kade Hansson <kade.hansson@xxxxxxxxxxxxxxxx> wrote:
> > The limit in DOSFS is basically a FileSwitch limit (although, as is
> > always the case in the tangled FS web woven in RISC OS, FileCore/ADFS is
> > also involved.) A file pointer or address in FileSwitch is a signed
> > 32-bit number. DOSFS works as an image file system, so it can only handle
> > images as big as FileSwitch's file pointer can read. i.e. 2GB.
> The limit on DOSFS is primarily because its a FileCore image filing system.
> i.e. it accesses the FAT partition via a file handle passed to it (even if
> accessing an entire disc) so it has a 2GB limit imposed by FileCore /
> FileSwitch 32 bit maximimum file size.

> > Another issue is that from Windows 2000 (and that means XP and Vista as
> > well,) HDs on Windows are actually NTFS, not FAT. So that's a whole new
> > module anyway.
> FAT is still supported on removable devices which is our main interest,
> because NTFS is too fragile if not properly dismounted before removal.

IIRC XP will only format devices of 8GB and less to FAT it insists on using
NTFS above that, 16GB USB Flash pens are allready available so no future
proofing there!
I wonder what format the 16GB pens come in?

Thanks Kade & Druck for all the info.

Chris Evans

CJE Micro's / 4D                'RISC OS Specialists'
Telephone: 01903 523222             Fax: 01903 523679
chris@xxxxxxxxxxxxxxx     http://www.cjemicros.co.uk/
78 Brighton Road, Worthing, West Sussex,     BN11 2EN
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