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Old CD recovery


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#1 Darren B

Darren B

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Posted 10 February 2020 - 12:51 AM

I am dealing with archiving lots of old CD-R's, many of which will be failing due to bit rot, scratches etc.

 

A lot of CD's seem to have read errors on random sectors, which when I clean the CD seem to fix one but cause another... I've tried different drives.

 

What I would like to to do is do one scan when it reads what it can, and then to passive reads that try to re-read the bad sectors. A process that could be repeated, with the CD been remove in between until eventually a complete read of each sector is made.

 

Once completed the MDS/MDF could be saved on some cloud storage.

 

Any chance of this feature? It would become much valued given the age of old CD-R's now.


Edited by Darren B, 10 February 2020 - 02:04 AM.


#2 Charalambos

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Posted 10 February 2020 - 08:22 PM

You can try this: Alcohol's Options>Reading>Number of retries before reading error (set a value different than 0, as many as you want).



#3 Darren B

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Posted 12 February 2020 - 05:29 PM

You can try this: Alcohol's Options>Reading>Number of retries before reading error (set a value different than 0, as many as you want).

I'm already doing that but:

 

1) sometime I need to take the CD out to try polishing again

2) I find the old CD-R work better when cold. By the time you add retries the CD-R is now warm.

 

My suggestion would allow the CD to be removed, cleaned, cooled down and possible even retry the missing/bad sectors using a different CD/DVD/BD drive.



#4 Charalambos

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Posted 12 February 2020 - 08:21 PM

I don't know if this is possible, I doubt that the Development Team can spend time on this.






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