LinuxQuestions.org
Visit Jeremy's Blog.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie
User Name
Password
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!

Notices


Reply
  Search this Thread
Old 09-30-2007, 03:04 PM   #1
moxieman99
Member
 
Registered: Feb 2004
Distribution: Dabble, but latest used are Fedora 13 and Ubuntu 10.4.1
Posts: 419

Rep: Reputation: 138Reputation: 138
dd does not work with read-only files


I put an audio CD in a CD-ROM (/dev/hdc), and a writable CD in a CD burner (/dev/hdb) in my computer.

k3b copies the audio CD onto the blank writable CD just fine.

When I try to use dd, however, as in (from terminal)

dd if=/dev/hdc of=/dev/hdb

dd refuses to work on the grounds that the "if" is "read only."

Is it my breath?
 
Old 09-30-2007, 03:06 PM   #2
AAnarchYY
Member
 
Registered: Sep 2004
Location: Carlisle, MA
Distribution: Debian 8
Posts: 419

Rep: Reputation: 30
see if dmesg tells you anything
 
Old 09-30-2007, 07:37 PM   #3
Junior Hacker
Senior Member
 
Registered: Jan 2005
Location: North America
Distribution: Debian testing Mandriva Ubuntu
Posts: 2,687

Rep: Reputation: 61
I don't think dd will do that for you unless you pipe the output to the blank disk with a CD/DVD burning application like cdrecord. Although I've never done it, I'm only assuming this would be the route you would have to take. Normally you would make an ISO of the disk with dd and burn the ISO CD image file to a blank disk with burning applications.
 
Old 09-30-2007, 08:22 PM   #4
Tinkster
Moderator
 
Registered: Apr 2002
Location: in a fallen world
Distribution: slackware by choice, others too :} ... android.
Posts: 23,066
Blog Entries: 11

Rep: Reputation: 910Reputation: 910Reputation: 910Reputation: 910Reputation: 910Reputation: 910Reputation: 910Reputation: 910
Quote:
Originally Posted by moxieman99 View Post
I put an audio CD in a CD-ROM (/dev/hdc), and a writable CD in a CD burner (/dev/hdb) in my computer.

k3b copies the audio CD onto the blank writable CD just fine.

When I try to use dd, however, as in (from terminal)

dd if=/dev/hdc of=/dev/hdb

dd refuses to work on the grounds that the "if" is "read only."

Is it my breath?
What user are you when you do the dd, do you have the
permission to access the raw device?


Cheers,
Tink
 
Old 10-01-2007, 11:05 AM   #5
moxieman99
Member
 
Registered: Feb 2004
Distribution: Dabble, but latest used are Fedora 13 and Ubuntu 10.4.1
Posts: 419

Original Poster
Rep: Reputation: 138Reputation: 138
Quote:
Originally Posted by Tinkster View Post
What user are you when you do the dd, do you have the
permission to access the raw device?


Cheers,
Tink
---------
Tink,

I'm doing it as root. Permissions are not a problem. Remember, k3b copies it just fine and then burns it.

Also, I'll see what dmesg says and post it later. Basically, I'm putzing around with dd and this limitation ("read-only") threw me. From what I read, I didn't think that that would be a problem.
 
Old 10-01-2007, 11:59 AM   #6
matthewg42
Senior Member
 
Registered: Oct 2003
Location: UK
Distribution: Kubuntu 12.10 (using awesome wm though)
Posts: 3,530

Rep: Reputation: 63
I'm pretty sure you can't simply write to a CDRW... I would imagine burning a CD is not a normal block device write operation. You could write to an intermediate file on your hard disk, or large flash drive, and then burn that using k3b or similar.
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off



Similar Threads
Thread Thread Starter Forum Replies Last Post
Shell programming: Question about source files and read data from the files ccwq Programming 3 08-05-2007 01:13 AM
Read only files Gins Linux - General 14 01-08-2007 05:30 AM
mozzla problems-can not read files online, can not read attachments sarajevo Linux - Software 1 09-20-2005 07:58 PM
How program to read files with extension .dat y .cfg files COMTRADE in fedora 1? ivonne Linux - Software 0 11-22-2004 12:42 PM
Example share in smb.conf doesn't work - read/write vs read only kleptophobiac Linux - Networking 0 09-01-2004 08:14 PM


All times are GMT -5. The time now is 10:47 PM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration