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|Recover a Quick erased CD RW|
Procedure used to recover data from a quick-erased CD-RW disc
1. Make a file of exactly the size of the cdrw disc's capacity (650MB in my case).
(this step may not be needed)
With Nero I created a new project and added the file to it so that I
have the disc filled. I gues you can also fill up the disc with other
The reason why I fill the disc is because I want Nero to make
a session that uses the entire disc. Like I wrote earlier in this
thread I experienced that my CD-Drive refuses to read off the disc
beyond the session's boundaries. When you quick-erase a disc there is
no session anymore so the drive will not read at all. Burning a new
session will overwrite the data and burning only a small session will
NOT make the drive read the other data that is still on the disc.
reason why I used the one big file is so that I could later on
recognize which part of the disc was overwritten by this file because
this file contained all zeros (0x00).
3. I pressed burn
and selected disc-at-once. Then while Nero was burning the leadin I
pressed cancel. My CD-Drive finished writing the lead-in and Nero
reported an error.
This is what was accomplished however: Now the
disc contains a session that says that the used disc size is the
complete disc. Nero did not get to writing file because I cancelled it.
Good thing because I don't want Nero to write any files because my old
data will get overwritten!
I gues it works the same with different
writing software. Another method that I used during a test was simply
press the reset button of the computer when the burning software was
done with writing the lead-in and started with the files.
4. I had to restart the computer after cancelling burning.
the cdrw disc inserted I saw in "my computer" that windows recognized
that the disc was 650MB, clicking on it gave an error. Good so far!
Now with IsoBuster you can extract the sectors from a disc to a file. This is what I did.
gues that if you have data-recovery software at this point it will be
usefull because now (if all went well;)) the CD-Drive WILL read data
from the entire disc. Anyway, I used ISO-Buster because the files that
I needed to recover where a bit odd for nowadays (.XM, .S3M, .MP3):
In IsoBuster I had to do several steps:
Step 1: Find out from and to which sector the drive will read
By choosing "Sector View" you can look at any given sector.
I found out what the first and the last sectors where that are
readable. (Hint I used the method for the old game: "Gues a number
below 100, I'll tell if it is higher or lower than what you gues")
Step 2: Extract the actual sectors
choosing "Extract From-To" you can extract any given range of sectors
to a file. My disc was a data-disc so I choose the first extraction
type "User data, 2048 bytes/block...".
In the end I got a .tao
file which was about 650MB. I ran several programs on it to look for
files inside a file by searching for file-header-paterns:
Multi Ripper 2.80 (for DOS, for the .XM files. It does many other file
formats as well (jpg,png, bmp,wav,etc,etc +100). Try google with this
query: Multi Ripper 2.80. I still had the file from good old days but I
saw several good search results)
2. Winamp for mp3.
will scan any file when you give it the extension .mp3 and play it as
one big song (so I renamed the .tao file to .mp3). I used the
discwriter to get a .wav and the Adobe Audition to manually cut and
save my songs. I looked at the MP3 file format and it is hard to find
an mp3 file in a big file because it has no clear header just a bunch
of mpeg-frames in most cases for me . A lot of my files had no ID3v2 or
ID3v1 tags... But after a couple of hours I recovered everything.
Finally a list of used stuff:
- IsoBuster v1.5
- Nero 220.127.116.11
- Multi Ripper 2.80
- WinAmp v5.02
- Windows XP Pro NL (patched up)
- NEC DVDRW ND1300A 1.06
- some old 4 speed cdrw
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