-----Original Message----- From: Jason Pyeron Sent: Wednesday, August 27, 2014 0:09
-----Original Message----- From: John R Pierce Sent: Tuesday, August 26, 2014 20:11
On 8/26/2014 5:03 PM, Jason Pyeron wrote:
What am I doing wrong here?
A) you don't create anything in /dev, the driver should be using devfs to create its own devnodes on the fly as needed.
I assumed such, but it did not work.
B) you apparently never loaded the driver. see http://www.atcomputing.nl/Tools/cowloop/loadunload.html
3.2.0.1 says:
root@localhost ~/cowloop-3.2.0.1 # cat RELEASENOTES.3.2.0 This is version 3.2 of the Copy on Write loop driver 'cowloop' by ATComputing in Nijmegen, The Netherlands. Release date: September 2009.
Cowloop wil be part of the 2.6.31 kernel. This has lead to some changes in the cowloop utils. Obviously the kernel module has been removed from the distribution, only the utilities remain.
Per http://en.wikipedia.org/wiki/Cowloop
Cowloop (copy-on-write loop driver) was a Linux kernel driver ... Cowloop is now largely deprecated in favor of the device-mapper snapshot target which provides the same functionality.
On to learning device mapper, https://www.kernel.org/doc/Documentation/device-mapper/snapshot.txt
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