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 Forum index » House Training » HOWTO ( Solutions )
One way of check the CD-device for presence of readout error
Moderators: Flash, Ian, JohnMurga
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postfs1


Joined: 27 Mar 2010
Posts: 831

PostPosted: Sun 10 Oct 2010, 20:53    Post_subject:  One way of check the CD-device for presence of readout error
Sub_title: OS: Linux Puppy-4.30
 

------------------------------------
START
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1)I inserted nonempty CD into the CD-device.
Nonempty CD was with Puppy Linux OS.
....................................
2)In terminal:

Code:
dd if=/dev/sr0 of=/dev/null bs=2048


RESULT:
Quote:
dd: reading `/dev/sr0': Input/output error
51200+0 records in
51200+0 records out
104857600 bytes (105 MB) copied, 49.1862 s, 2.1 MB/s

....................................
3)I found internet page:

http://mandrivausers.org/index.php?/topic/68514-cat-devhdd-cdiso-not-possible-anymore-why/
....................................
4)In terminal:

Code:
iso-info -d -i /dev/sr0


RESULT:
Quote:
Not that what has been mentioned on the internet page.

....................................
5)I installed an another version of the already existing program.

In terminal:

Code:
cd /archive


Code:
wget -c ftp://ftp.pbone.net/mirror/ftp.centos.org/5.5/os/i386/CentOS/mkisofs-2.01-10.7.el5.i386.rpm


Code:
rpm -i mkisofs-2.01-10.7.el5.i386.rpm


Code:
rm /archive/mkisofs-2.01-10.7.el5.i386.rpm

....................................
6)In terminal:

Code:
isoinfo -d -i /dev/sr0


RESULT:
Quote:
Exactly what has been mentioned on the internet page.

....................................
7)Using the internet page's information, i ran in terminal such a command:

Code:
dd if=/dev/sr0 of=my.iso bs=2048 count=51196 conv=notrunc,noerror


Note: -=51196=- is one of the results of the -=isoinfo -d -i /dev/sr0=- command.

RESULT:
Quote:
51196+0 records in
51196+0 records out
104849408 bytes (105 MB) copied, 43.4924 s, 2.4 MB/s

....................................
8)In terminal:

Code:
rm /archive/my.iso

....................................
9)In terminal:

Code:
dd if=/dev/sr0 of=/dev/null bs=2048


RESULT:
Quote:
51200+0 records in
51200+0 records out
104857600 bytes (105 MB) copied, 43.4813 s, 2.4 MB/s

------------------------------------
FINISH
------------------------------------

_________________
  • I don't know why laboratories are named a hospitals.
  • The alive personage is like a tea bag with granules of unknown density inside, at that one the packet was made of organic material and was placed in the evaporated liquid or liquid.


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Flash
Official Dog Handler


Joined: 04 May 2005
Posts: 11164
Location: Arizona USA

PostPosted: Sun 10 Oct 2010, 21:50    Post_subject:  

So what does this prove or indicate? I don't see why it's in the Howto section. Confused
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postfs1


Joined: 27 Mar 2010
Posts: 831

PostPosted: Sun 10 Oct 2010, 22:39    Post_subject:  

@Flash
Title has been changed.

_________________
  • I don't know why laboratories are named a hospitals.
  • The alive personage is like a tea bag with granules of unknown density inside, at that one the packet was made of organic material and was placed in the evaporated liquid or liquid.

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