Subject: Re: MountReinier CD-RW
To: <>
From: David Laight <>
List: netbsd-users
Date: 08/28/2002 11:33:19
On Wed, Aug 28, 2002 at 11:15:43AM +0200, Wojciech Puchar wrote:
> i read a lot about it - it looks like CD-RW drive will be able to
> write to sector boundary - just like normal hard drives, and even will do
> error correction, and will automatically format (=write some headers) on
> new CD-RW.

IIRC the sectors are 64k and you only get about 80% of the capaicity.
> does anyone know how compatible it really is and if it can be used under
> NetNBSD ? or it's wincompatible only?

For a variety of reasons (probably justified) a special 'udf' filesystem
is used.
> having CD-RW drive that i can just do newfs, mount and use it sounds
> really nice.

There is also the little known issue that you can only 'mount'
a CDRW (for writing) IIRC 20 times.  This is because a small
patch (reserved in the leader) is destroyed while working out
the correct intensity for th laser, once these areas are all used
up the test can't be performed again and the drive (should not)
let you write to that media again.


David Laight: