Message-Id: <200204251531.g3PFVQx13216@sitelicense.arizona.edu> Date: Thu, 25 Apr 2002 08:33:51 -0700 From: Guenter Waibel <mailto:guenter@UCLINK4.BERKELEY.EDU> Subject: Re: pens for marking CDs To: mailto:IMAGELIB@listserv.arizona.edu
<pre>
I know I'm sounding anal now, but I've heard people claim before that
CDs have unique serial numbers generated by the manufacturers, and I
feel somewhat cautiously doubtful of that statement's implications.
That serial number would probably be only unique to a specific
manufacturer, not across the board for all manufacturers. If you need
to switch to a new manufacturer (as many of us had to with some
popular CD-Rs not being produced anymore), you could potentially get
the same numbers again. Somehow I even doubt that they would be
unique to one manufacturer - it seems to me that the process of
creating unique id's across different plants etc would be somewhat
daunting. All of this to say that I'd be very hesitant to use this id
as my only identification for the CD. Lynn seems to have a system of
the disk no and another Id, which seems like a very prudent approach.
I happily stand corrected, though. Any thoughts? Does anyone have the
inside scoop on how those numbers are created and in what context
they are positively absolutely unique?
Cheers,
Guenter
>We have labels on the CD cases for our photodigitization project because
>everyone told us not to label or mark on CDs. Each CD does have a unique
>serial number generated by the manufacturer. I keep a database of
>information that includes an ID #, the disk #, collection initials, photo
>numbers on the CD, shipment #, batch #, manufacturer's serial #, QC
>performed (checkbox), loaded (checkbox to indicate that the images have been
>loaded on our image server), and comments.
>
>This has worked well for us. When we want to retrieve a CD, we check the
>database and can tell immediately which ID# it is. CDs are stored in
>numerical order by ID #.
>
>Lynn
>Lynn Ewbank, CA
>Photo Archivist
>Arkansas History Commission
>One Capitol Mall
>Little Rock, AR 72201
>Phone: (501)682-6896
>Email: mailto:lynn.ewbank@mail.state.ar.us
>Website address: http://www.ark-ives.com/photo
>
>
>
>
>
>-----Original Message-----
>From: Hannah Frost [mailto:mailto:hfrost@STANFORD.EDU]
>Sent: Wednesday, April 24, 2002 4:14 PM
>To: mailto:IMAGELIB@listserv.arizona.edu
>Subject: Re: pens for marking CDs
>
>
>Some folks say that using a water-based ink pen is OK, but in general
>writing on CDs should be avoided if at all possible. I believe all CDs (at
>least the good ones) have a unique number assigned by the manufacturer and
>located on their inner hub, which you can use to create a separate index to
>their contents.
>
>________________________
>Hannah Frost
>Media Preservation Librarian
>Stanford University Libraries
>
>
>
>At 04:46 PM 4/24/2002 -0400, you wrote:
>>I feel odd asking the listserv about pens, but this does have to do with
>>imaging, indirectly.
>>
>>I was in the process of backing up our image files onto CD and looked at a
>>CD I had burned 6 months ago. The ink from the permanent ink pen I had
>>used (Kaiser - Schreiber) has bled from the letters into the surrounding
>>white on the label layer. I don't know if it's limited to the label layer
>>or it has/will bleed into the CD substrata (I can still use the CD, so this
>>is not an impending crisis). I was wondering if this is a common
>>experience or if there are other pens I should be using. Perhaps the PEC
>>Pens?
>>
>>Feel free to reply directly to my e-mail.
> >
> >--Larry Wentzel
> >--Digital Preservation Coordinator
> >--Penn State University Libraries
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Guenter Waibel Berkeley Art Museum & Pacific Film Archive Digital Media Developer http://www.bampfa.berkeley.edu/ Digital Imaging SIG Chair, MCN http://www.mcn.edu/visig_subscribe.taf mailto:guenter@uclink4.berkeley.edu Phone 510-643-8655 Fax 510-642-4889 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</pre>
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