Groups > comp.os.linux.development.system > #749

Re: dd and IO

From	"Bill Cunningham" <billcun-remove-@suddenlink.net>
Newsgroups	comp.os.linux.development.system
Subject	Re: dd and IO
Date	2016-04-16 18:16 -0400
Organization	A noiseless patient Spider
Message-ID	<neudec$1n0$1@dont-email.me> (permalink)
References	(1 earlier) <1b37qmv543.fsf@pfeifferfamily.net> <netq2c$4sh$1@dont-email.me> <slrnnh4otc.5q5.grahn+nntp@frailea.sa.invalid> <slrnnh4svo.5q5.grahn+nntp@frailea.sa.invalid> <neud6b$f0$1@dont-email.me>

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"Bill Cunningham" <billcun-remove-@suddenlink.net> wrote in message 
news:neud6b$f0$1@dont-email.me...
>
> "Jorgen Grahn" <grahn+nntp@snipabacken.se> wrote in message 
> news:slrnnh4svo.5q5.grahn+nntp@frailea.sa.invalid...
>
>> Going back, what actually happened was you asked one question (about
>> zeroing a CD-RW), then changed the subject and asked another.  JP
>> replied to the first one.  It now seems you're more interested in this
>> second one:
>>
>>     I am also trying this and getting errors.
>>
>>     dd if=/dev/sr1 of=/xpmce.iso
>>
>>     I want to write an ISO 9660 XP MCE OS CD/R into a ISO. And get
>>     data errors.  What's going on?
>>
>> Well, that should work if you are root (so you can create files in /)
>> and the CD isn't broken.  If it's broken you should
>>
>> - get an error message from dd
>> - /xpmce.iso will not be complete
>> - and probably you'll find complaints from the kernel in /var/log/.
>
> Well it didn't. I always believed dd was raw data, binary. I booted into 
> XP and erased the CD with CD/DVD erase/burn tools and it's ready to be 
> written to again. So the CD isn't broke. I will try with another CD 
> tomorrow.  will save and post the errors.
>
> Bill

    Wait a minute scratch that. I am all confused today. That was another CD 
a CD-RW. Ok with the CD/R of course it's mounting in linux and I can go in 
and read that data. One of these CDs I know is defective. But not this one. 
I have tried 2 CD/Rs actually and got the same results. I'll get back 
tomorrow.

Bill

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dd and IO "Bill Cunningham" <billcun-remove-@suddenlink.net> - 2016-04-14 14:22 -0400
  Re: dd and IO "Bill Cunningham" <billcun-remove-@suddenlink.net> - 2016-04-14 14:22 -0400
  Re: dd and IO John Reiser <jreiserfl@comcast.net> - 2016-04-15 05:19 -0700
  Re: dd and IO Joe Beanfish <joebeanfish@nospam.duh> - 2016-04-15 14:16 +0000
    Re: dd and IO "Bill Cunningham" <billcun-remove-@suddenlink.net> - 2016-04-15 17:49 -0400
  Re: dd and IO Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2016-04-15 17:12 -0600
    Re: dd and IO "Bill Cunningham" <billcun-remove-@suddenlink.net> - 2016-04-16 12:46 -0400
      Re: dd and IO Jorgen Grahn <grahn+nntp@snipabacken.se> - 2016-04-16 20:18 +0000
        Re: dd and IO "Bill Cunningham" <billcun-remove-@suddenlink.net> - 2016-04-16 17:21 -0400
        Re: dd and IO Jorgen Grahn <grahn+nntp@snipabacken.se> - 2016-04-16 21:27 +0000
          Re: dd and IO "Bill Cunningham" <billcun-remove-@suddenlink.net> - 2016-04-16 18:12 -0400
            Re: dd and IO "Bill Cunningham" <billcun-remove-@suddenlink.net> - 2016-04-16 18:16 -0400
          Re: dd and IO "Bill Cunningham" <billcun-remove-@suddenlink.net> - 2016-04-16 18:46 -0400
            Re: dd and IO Jorgen Grahn <grahn+nntp@snipabacken.se> - 2016-04-17 06:43 +0000
              Re: dd and IO "Bill Cunningham" <billcun-remove-@suddenlink.net> - 2016-04-17 15:11 -0400
                Re: dd and IO Jorgen Grahn <grahn+nntp@snipabacken.se> - 2016-04-19 15:33 +0000

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