Re: Mount DVD disk

[Todd Gruhn <tgruhn2%gmail.com@localhost>]

I might have fixed:

Try new DVD+RW  -- mount , and cannot do anything

THEN I did:

newfs_udf /dev/rcd0d

mount -t udf /dev/cd0a /cdrom

to test copy large file to DVD+RW, and delete it. That worked.

I will reformat tho old DVD+RW disks.

On Mon, Jul 29, 2024 at 3:43 PM Robert Nestor <rnestor%mac.com@localhost> wrote:
>
> It’s been a few years since I played with RW DVD so this may not be correct, but as I recall they’re basically like flash.  New write/deletes basically revector previously written blocks to new blocks called “sessions” until there are no more unused blocks on the device OR the last write closes the session.  At this point the DVD becomes RO and can only be restored to be RW by totally erasing the DVD.