Berkeley CSUA MOTD:Entry 43982
Berkeley CSUA MOTD
2019/04/20 [General] UID:1000 Activity:popular

2006/8/12-15 [Finance/Banking, Computer/HW/Drives] UID:43982 Activity:nil
8/11    Aside from physically breaking a CD, what's the easiest way to make
        it permanently unreadable?
        \_ If you have a secure shredder service, they usually handle CDs as
        \_ Get a screwdriver, scratch the top of the CD.  It's not that much
           more work than writing with a pen.  Remember, data on CD is near
           the top, highly unprotected.  DVDs are different.
        \_ I've heard a microwave oven works pretty well, though I'm not sure
           if it is damages the microwave oven..
           \_ As with metal in the microwave, the main problem is microwave
              energy getting reflected back into the magnetron, damaging it.
              You could probably mitigate this by putting a big cup of water
              next to the CD(s) in the microwave.
        \_ Pee on it.  -guy who drank a lot of water today
        \_ They sell machines that punches holes on CD.  Look on CDW.
           \_ I was thinking more of the type of solution like "bake it in
              the sun", or "write on it with a permanent marker" or
              something very simple and easy like that.
              \_ How is breaking it not simple and easy?  -tom
                 \_ I know of organizations who use a lot of CDs for
                    mid-term (5-10 years) data storage.  After a certain
                    number of these things, it may be economical to have a
                    fast way of nuking them.  On the other hand, you could
                    just hire a student, I guess.  -John
                    \_ Sounds like a job for an intern with a solid knee.
                       \_ Or a hammer.  They also have shredders that can
                          do CDs.  -tom
                          \_ You'd trust an intern with a hammer?  Will no one
                             think of the children?
                          \_ BTW don't pollute the paper in the paper shredder.
2019/04/20 [General] UID:1000 Activity:popular

You may also be interested in these entries...
2005/2/3-5 [Computer/HW/Memory, Computer/HW/Drives] UID:36055 Activity:moderate
2/3     So, I'm really confused about this notion of computer science
        metrics where everything's kind of 2^n, but sometimes not. For
        example, if I have a 4 GIG hard drive, does that mean I have
        exactly 2^32 bytes of space? Does that translate to 4000000000
        bytes, or some number that's close to it? How about megahertz?
        Say I have a 2.5GHz computer, does it run at exactly 2500000
2004/9/1 [Computer/HW/Drives] UID:33272 Activity:high
9/1     Securely destroy your CD/DVDs:
        \_ Don't CDs often have stuff you aren't supposed to breathe in
        \_ nuke it in the microwave.
        \_ Do people really need this?  If I just break a CD in half, can
2000/8/28-29 [Computer/HW/Drives] UID:19115 Activity:kinda low
8/28    I copied an audio CD with a CD drive on a PC, and the duplicate CD can
        only play in a regular CD player but not in a DVD player.  The DVD
        player doesn't recognize the CD.  Is this a common problem?  (I have
        consent from the author of the CD to make copies.)  -- yuen
        \_ Yes, many DVD players do not support CD-R/RWs. I believe only
           Toshiba or Sony has comprehensive support of all disc formats