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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
Subject description: 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.


Last edited by postfs1 on Sun 10 Oct 2010, 22:35; edited 1 time in total
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Flash
Official Dog Handler


Joined: 04 May 2005
Posts: 11063
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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