Subject: Re: 2048 bytes/sector devices? (DVD RAMs, Fujitsu MO's, etc)
To: Ignatios Souvatzis <is@netbsd.org>
From: David Laight <david@l8s.co.uk>
List: tech-kern
Date: 06/29/2005 20:49:26
On Tue, Jun 28, 2005 at 11:40:28AM +0200, Ignatios Souvatzis wrote:
> On Mon, Jun 27, 2005 at 02:26:55PM -0700, Tom Nakamura wrote:
> > What is the status regarding devices with 2048 bytes/sector, such as DVD
> > RAM's and larger Fujitsu Magneto Optical drives? Apparently its
> > non-trivial to make this happen, though I don't understand why some
> > devices such as CD's (which are 2048/sector AFAIK) can be read (can
> > somebody explain this to me simply?). Does using IDE or SCSI make a
> > difference? 
> 
> The problem isn't _reading the devices_, it's interaction of the filesystem
> with the underlying block size.

And working out what numbers to put in a disklabel/mbr.
Do you know what the mbe extended partition chain looks like with 2k sectors?

CDROM/DVD tend to use their own special filesystem types which are designed
for 2k sector sizes.

	David

-- 
David Laight: david@l8s.co.uk