how to extract data from bad iso file
 

As I have an iso file of size 404MB and the file is corrupted so can you suggest how to extract data from the file. It contains lot of pdf files which are valuable so I want data without any loss(atleast minimum).

Download free utility PowerISO for Linux, extract it and then give following command

For help:
To extract:

Also consider using other extraction utilities like p7zip/7za.

Sir I have used poweriso and also used the command specified by you and the output is

root@Rupesh:/home/books/temp# ls
books.txt file.iso poweriso temp
root@Rupesh:/home/books/temp#

root@Rupesh:/home/books/temp# ./poweriso extract file.iso / -od /home/books/temp/temp/

PowerISO Copyright(C) 2004-2008 PowerISO Computing, Inc
Type poweriso -? for help

file.iso: The file format is invalid or unsupported.
root@Rupesh:/home/books/temp#

As the iso file is corrupted so please suggest how to use any other tools like dd,ddrescue,testdisk which will work efficiently without any errors etc.,

Out of curiosity how was the ISO file created?

is this image ACTUALLY called "file.iso" ?
if that is not the name of the image then it might output something like

"file.iso: The file format is invalid or unsupported."

also that error can be tossed if it is NOT an iso , but a zip or rar .

what operating system and desktop are you using
for KDE "arc" has no problems opening an iso image .
And on Gnome "File-Roller" has no problems opening an iso image .

if is is really mangled ( and NOT an encrypted image ) then "photorec" might be able to recover some things

Sir as you specified I have changed the file name to file.iso but before renaming the file also I got the same errors. At present I am using Debian wheezyAMD64bit and KDE DE. As I have requested help on Debian forum they are not responding at all but you are providing lot of tips. I think that something is wrong with the iso file so I am requesting you to check the file and if it works in your system please suggest how you made it to work.


Actually I have download the file from internet using torrent on android mobile and then I have transferred to system the iso file which has taken completely 24 hour's and the file size is 404MB. I am submitting torrent file as an attachment please verify the file with patience and help me.

Mr Rupesh,

The attached torrent file is being spread with information claiming it contains a number of eBooks, none of which are authorized by the copyright holders for distribution in this manner.

If the file does indeed include these books, the distribution of the material via BitTorrent would constitute copyright infringement and be illegal in many (if not most) countries. You should probably refrain from discussing illegal activities on linuxquestions.org.

I do not know for a fact whether the file actually does contain those eBooks, but searching for the file on the Internet, I came across claims that the file is not really an .iso file, but rather an archive format created by a Windows application. Why it would have an .iso file extension when it is not actually an ISO file, I can't say.

try removing the .iso file extension

then r-click on it and look at the properties

what type of archive dose kde tell you it is

Hi,

given what is in post #8 it seems that this topic is not appropriate for LQ. If the copyright of these does allow distribution in this manner I apologize, but unless you can demonstrate that, I think this thread should be closed.

Evo2.

Forget iso, visit this site instead,

http://www.tldp.org/

Sorry for posting such a topic

Moderator Response
 

The file you linked is a Torrent seed file;Not knowing if the eBooks are copyrighted material causes this to be somewhat questionable at this point. So I suggest that you not violate LQ Rules or request fellow members to do so since the content is questionable.

You can look at Linux Books & Online Magazines to get Free books and information.

At LQ we're serious about copyright. There are many books and tutorials on Linux distributed under free licenses, it is much better to try them. This thread is closed.