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Re: /dev/sdb permission denied
- From: andrei <andrei at unpure dot com>
- To: cygwin at cygwin dot com
- Date: Tue, 9 Apr 2013 10:41:56 +0000 (UTC)
- Subject: Re: /dev/sdb permission denied
- References: <loom dot 20130408T175158-592 at post dot gmane dot org> <5162F964 dot 3090306 at cygwin dot com>
Larry Hall (Cygwin <reply-to-list-only-lh <at> cygwin.com> writes:
> On 4/8/2013 12:04 PM, andrei wrote:
> > Hi
> > Running version 1.7.17-1
> > Trying to $ dd if=/dev/sdb of=/dev/null count=10 - compact flash card in
> > PC CF card reader.
> > Running above command displays: dd: opening `/dev/sdb': Permission
> > Searched for solutions, but could not find anything to solve. Also
> > running cygwin as administrator but still the same problem.
> > Do I have to mount the /dev/sdb or it is not required in later versions
> > anymore?
> No, you don't. Have you seen this FAQ entry?
> What's the result of 'ls /dev/sd*'?
result of 'ls /dev/sd*':
$ ls /dev/sd*
/dev/sda /dev/sda2 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1
/dev/sda1 /dev/sdb /dev/sdc /dev/sdd /dev/sde
according to <http://cygwin.com/cygwin-ug-net/using-
specialnames.html#pathnames-posixdevices> I should have /dev/shm and
/dev/mqueue and possibly other directories in the /dev directory?
$ cat /proc/partitions
major minor #blocks name
8 0 312571224 sda
8 1 301684603 sda1
8 2 10884037 sda2
8 16 1000944 sdb
8 32 0 sdc
8 48 0 sdd
8 64 0 sde
the above shows the 1gig CF card is detected and has 'sdb' assingend to it.
so it looks like the problem is that I'm missing /dev/shm and /dev/mqueue -
is this correct? what can be done to solve
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