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Dvd's perish over time
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cyberrich
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Joined: 05 Sep 2008
Posts: 1015
Location: Midlands, U.K.

PostPosted: Fri Aug 23, 2013 8:00 am    Post subject: Reply with quote

dissolute wrote:
I always back up my DVD & BRD to digital copies, but you need a ton of disk space to do it - worth it though, as you can make backups locally, on different disks, in the cloud... Burnt CDs & DVDs do die,


I've never tried this, but I'd love to know how. What is the best way to make a digital copy Question Do you mean you copy the burned dvd or cd to a hard drive Question Or is it to a hard disc Question How long would a hard disc last? I've got several burned cd's and dvd's of rare stuff not commercially available and I'd hate to lose it. Just checked my oldest burned cd, 10 years old, and it still works. But for how much longer Question
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mousemeat
A Touch of Brimstone


Joined: 04 Sep 2008
Posts: 4200
Location: Elvis Central, U.S.A.

PostPosted: Fri Aug 23, 2013 10:27 am    Post subject: Reply with quote

cyberrich wrote:
dissolute wrote:
I always back up my DVD & BRD to digital copies, but you need a ton of disk space to do it - worth it though, as you can make backups locally, on different disks, in the cloud... Burnt CDs & DVDs do die,


I've never tried this, but I'd love to know how. What is the best way to make a digital copy Question Do you mean you copy the burned dvd or cd to a hard drive Question Or is it to a hard disc Question How long would a hard disc last? I've got several burned cd's and dvd's of rare stuff not commercially available and I'd hate to lose it. Just checked my oldest burned cd, 10 years old, and it still works. But for how much longer Question


hard to say....factors range from the material used on the discs, conditions that it was recorded by...living areas, and more...I would suggest backing up via disk, flash drive etc..
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Borgus Weems
Have Fingers... Will Type!


Joined: 03 Jan 2009
Posts: 396

PostPosted: Sat Oct 19, 2013 12:15 pm    Post subject: Reply with quote

Just a few thoughts:

- I don't think that even conventional DVD's/CD last 100 years in a playable condition; I think it's more like 20-25 years.

- The glue that messed up on your Bond set was (I bet) involved in attaching the image to the top of the disk

- The actual information is saved fairly deeply under the surface of the reading side of the DVD; most of the surface is just blank plastic. When scratches bother the playback, it's usually not because the scratch removed information, but because the scratch makes the laser lose it's place. At the library I work, they have a machine that "fixes" scratches by taking a rough brillo-pad style surface and scraping away the whole old playing surface, then they slowly wear down the newly rough surface with lighter and lighter buffers until it's smooth again. I think this same machine is used by DVD rental companies to keep their disks playable.

- In DVD-R's, the informnation that plays back is created by tiny dots of ink fired from your machine onto the blank disk, and thus is much less permanent.

- I've had one CD that experienced CD rot so far, and it looked like tiny holes in the surface of the CD. I could put it in and it would start playing but would soon breakdown after about half a song.
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