Klarinet Archive - Posting 000360.txt from 2001/12

From: "Mark Charette" <charette@-----.org>
Subj: RE: [kl] MP3 vs CD audio
Date: Sun, 16 Dec 2001 16:08:11 -0500

> -----Original Message-----
> From: Benjamin Maas [mailto:benmaas@-----.com]
>> I wouldn't use CDs for backup that you really care about. Errors cannot
> truly be verified without the use of a CD disc analysis machine (at a cost
> of about $25,000). That is why in the audio world, CDs are the
> last choice
> for delivery of masters for replication. People usually use data
> tape (ie.
> Exabyte) which can have bit-by-bit verification done on it without extra
> hardware.

Ben,
Good data backup software for CDs has ECC codes added for error detection &
correction. A read after write (bit by bit compare) is a base level
operation and is an option on even the cheapest backup software (no hardware
needed!). CD & DVD media is used extensively in the computer industry for
archival backups.

Mark C.

---------------------------------------------------------------------