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Community Newsletter: Q&A: 1/27/06 How long do burned CD-Rs and CD-RWs last?
- 1/26/06 5:55 PM
CD-R Burning photos
by mcthistle - 2/17/06 9:11 AM In reply to: 1/27/06 How long do burned CD-Rs and CD-RWs last? by Lee Koo (ADMIN)
I burned about 250 jpegs onto a CD-R and when I checked them out, all the jpegs were read only. Any comments are appreciated.
files burned to a CD are always Read-Only- 1 exception - UDF
by jdeere_man - 2/17/06 3:58 PM In reply to: CD-R Burning photos by mcthistleWhen you burn files to a cd they are most always going to be read-only. There is only 1 exception to this. Files will be read/write only when saved to a CD formatted in UDF (universal drive format) which enables DLA (drive letter access)packet writing ability.
You can format all CD-R, CD-RW, DVD±R, and DVD±RW disks. You must use a program, should probably be included with your Cd authoring software, but sometimes is not installed by default. Different manufacturers often refer to this technology in different manners, but is usually called on of the following: UDF, DLA, or Packet Writing, or simply Format CD. In Nero it is actually a seperate program called "InCD". In Sonic it's called "Direct-To-Disk" In Roxio Easy Cd Creater the program is called "DirectCD".
If you use this program to format the CD you can access the cd like any other read/write drive. Basically it becomes a huge floppy disk. Be advised though, the disk will not be accessible from ordinary CD-rom drives, only burners. However, if at some point you want to make it readable on an ordinary cd-rom drive you can use a function of the program to do this. Every time you perform this procedure it uses an additional disk space (which is unrecoverable). As a result I typically do not every "make the disk compatible with cd-rom drives" unless necessary. Typically I leave it in UDF format.
On a side note cd-rw disks take much longer to format that cd-r disks, but a cd-rw disk can always still be erased as normal.
I hope this answers your question.
all files copied to a CD-r are marked read-only
by neher5 - 1/7/07 9:19 AM In reply to: CD-R Burning photos by mcthistleHi,
That is only logical, as you would not have been able to write to a CD-r with the CD-r drives that were available at the time that CD-r disks and drives were introduced.
Best regards,
Hans
HOW ABOUT ARCHIVAL GOLD CDs?
by Ali5152 - 7/13/06 9:44 AM In reply to: 1/27/06 How long do burned CD-Rs and CD-RWs last? by Lee Koo (ADMIN)
I am looking at an ad for Archival Gold CDs & DVDs. Has anyone checked these out?
cpmdave
Life of Cds & DVDs
by emets - 8/23/06 12:34 PM In reply to: 1/27/06 How long do burned CD-Rs and CD-RWs last? by Lee Koo (ADMIN)
Congratulations! Very good article. i learned a lot.
emets2@yahoo.com
Can I recover faded CD's?
by Happy Ovi - 9/26/06 9:25 PM In reply to: 1/27/06 How long do burned CD-Rs and CD-RWs last? by Lee Koo (ADMIN)
Last night I tried to review some of the old digital pictures and to my desperation I discovered I can not reads CD’s from 2002 and 2003. I tried on 4 different CD_ROM drives (including the one used to burn the CD’s in the first place) and the result was the same: I could read the directory structure but not individual .jpg files. Then I attempted to copy the files on the HD but XP reported CRC error. I even tried to copy the files with old mighty DOS and still it fails for every single file.
Is there any hope I could recover some of the files on those CD’s?
The home burnt CD that last a “life time” is just a myth !
Do we really have any other alternative but burning the CD/DVD collection every 2 years?
Submitted by Ovidiu M. of Melbourne, Australia
Transfering from RW media to R media
by redapple2000 - 12/22/06 11:54 AM In reply to: 1/27/06 How long do burned CD-Rs and CD-RWs last? by Lee Koo (ADMIN)
If I record my movies on my Sony Handicam on to a RW disk and then copy and burn to R disk will this make my movies less vulnerable to degredation due to age?
Sharpie Permanent Marker a no no for labeleling cd's????
by redapple2000 - 12/22/06 12:02 PM In reply to: Transfering from RW media to R media by redapple2000After reading all the comments on degredation. I should I assume that using a Sharpie Permanent Marker to label my cd's is a big no, no?
How long do burned CD-Rs and CD-RWs last
by cebuBill - 12/23/06 2:04 PM In reply to: 1/27/06 How long do burned CD-Rs and CD-RWs last? by Lee Koo (ADMIN)
I can only offer an untechnical observation but I have found that many of my CDs of all types burned on a variety of burners frequently fail in as little as 2 years. Sometimes I can 'resurrect' one using a ripper or persevering with another reader but overall I find them totally unreliable - even less so than floppy disks!
None of these tecnologies has been properly tested and refined because the manufacturers are all hell bent on getting the next generation medium out to reap yet more profits and hang the quality.
Keith T
REPLY TO cebuBill
by geronimo1881 - 1/7/07 4:32 PM In reply to: How long do burned CD-Rs and CD-RWs last by cebuBillYup! You are spot on, but I've noticed that labelling with them thar printable sticky label type identifiers screw up the disks, I have found that simple small marker type pen does the trick!
I have disks that are several years old, the ones with the labels start to misread after about 2-3 years, whereas the marker pen ones perform o.k without any problems!
NOW, MY QUESTION IS, IF I STORE FILES ON A U.S.B FLASH DRIVE, HOW LONG WILL THE FILE LAST IF YOU LOADED THEM ON, LEFT THEM IN A DARKENED DRY DRAW (WITHOUT BUNGING THE DRIVE BACK INTO A U.S.B PORT), HOW LONG WILL WILL THEY BE VIABLE/READABLE?......COME ON YOU BRAINY GUYS AND GALS OUT THERE,YOU MUST HAVE SOME SORT OF INKLING?
PS.IN A FORMER POST I SUGGESTED THAT MAYBE OLD EDISON WILL HAVE THE LAST LAUGH AS VINYL/SHELLAC RECORDINGS WILL LAST VIRTUALLY FOR A LIFETIME IF THEY ARE STORED IN A REASONABLE WAY!
I HAVE NOW DISCOVERED THAT INDEED YOU CAN BUY A LASER READER TURNTABLE FOR YOUR OLD VINYL/SHELLAC RECORDS, SO THERE IS NO NEEDLE/STYLUS WEAR AT ALL!!! IT COST'S AN ARM AND A LEG THOUGH!
SO, WHO'S GONNA BE THE MANUFACTURER THAT BRINGS OUT A READ/WRITE TYPE VINYL/SHELLAC RECORDER THAT BURNS THE MEDIA IN A DIGITAL FORM,.....BET YER ASS SOMEONE SOMEWHERE IS WORKING ON IT?
RGARDS,
GERONIMO.
How long do burned cds last?
by Jason 212 - 2/11/08 10:31 AM In reply to: 1/27/06 How long do burned CD-Rs and CD-RWs last? by Lee Koo (ADMIN)
There is a lot of discussion and differing views regarding what labeling methods corrupt data on discs and what methods doesn't. There seems to be two camps here. Those who say that discs can be corrupted by labeling methods and those that say they have never experienced any data corruption. Fine. Both are correct but may I suggest that where there is smoke there is fire? Obviously certain inks and adhesives can cause data loss in certain discs under certain conditions. Why take a chance and why press your luck? If something was worth burning and labeling to begin with why not do everything you can to protect your discs? When playing Russian Roulette you have an 83% chance of not having your head blown off. Still those are tough odds when so much is at stake. Why not swallow your pride and just label your discs with an unquestionably safe method? I use a DiscPainter to label my discs. It prints on printable discs which offer an extra layer of protection against data corruption. The ink used is water based and not solvent based. I don't know about you but I would rather play Sicilian Roulette. That's a game where you know you will always win.
Don't forget redundancy
by jfkasenda - 5/20/08 9:32 AM In reply to: 1/27/06 How long do burned CD-Rs and CD-RWs last? by Lee Koo (ADMIN)
Even though nothing lasts forever but surely things can last very long. The same thing should apply to CD/DVD-Rs. The question is how. I myself made a lot of backups on DVD-Rs, and yes some of them, after awhile, are not flawless in terms of pefect readibiliy. Some bytes will eventually become unreadable, rendering files that contain them unusable. However from my experience, I learn several tips (some of which were also mentioned somewhere in the other posts).
1. Do not use the full capacity of the disk (especially for DVDs). A single layer DVD can hold up to 4.7GB. Use around 4 GB only. As you will notice, usually (if not most of the times) unreadable bytes take place in the outer part of the disc (near the edge). Unreadable bytes not only happen because of the physical factor (scratch, etc) but also happen because of weak laser. Some old drives have difficulty reading data on the outer part of the disc. This also suggest to never use the overburn feature.
2. Do not write with maximum speed. Although I can't prove it scientifically, I believe that writing with medium speed results with better writing on the media.
3. Despite of the brands, careful handling and storage of the media is crucial. Basic known facts are to keep them in a cool, dark place. What I can add is, use silica gell to control humidity in the storage place.
4. Do not use the backup CDs for daily data retrieval. The more often the CDRs are used, the bigger chance they can be corrupted by many factors. So, just backup (and make sure it is written successfully) and keep them. Do not use it for daily purpose, but only in times of emergency (like data restore).
5. Always prepare to create a new set of backups after every period of time. As for me, I check my CDs every year. So far, even four-year old DVDr are still okay (I started using DVD-Rs about 4 years ago). For CDs, some of mine are already over ten years old and they're all practically okay.
Having said that, don't forget redundancy. Having multiple sets of backup discs that contain the same data won't hurt. Even though the data are still perfectly intact in the media, after a period of time you might want to create a new set of backups. After along time, you will have several sets. In case of unreadable bytes, no two CDs would lose bytes on the same spot, so, having multiple sets will help to restore broken files.
So, backing up to CD/DVD-r? Why not!
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