Kuldar,

Of the 3 predominant DVD formats, most drives will read and write DVD+R and
DVD-R, The other format DVD-RAM is a different format.

A colleague just reminded me of the old 5.5 inch floppy disks. They used to
have a notch in the side, and you would put a sticky label over the notch to
write protect them. Then they had double sided disks that allowed you to
turn the disk over (LP style).

The only difference between a single and double sided disk was the presence
of the notch, so everyone just cut a notch with a hole punch or some
scissors.

Ah memories of the Apple IIe and Karateka...

Gerard

-----Original Message-----
From: Kuldar Aas [mailto:[log in to unmask]]
Sent: Tuesday, October 19, 2004 7:13 AM
Subject: Re: Storage media lifetimes

 Hi everyone,

 I wouldn't quite say that DVD is a well established standard - there
are still several standards with minor differences. The most obvious
examples are DVD-R and DVD+R.... Also, I'm not quite sure how much do
differ discs from different vendors? As I'm not really a specialist in
this field the question - has anyone more information about this topic?

Kuldar Aas
Estonian National Archives
e-mail: [log in to unmask]
phone +372 7374 575

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