[mythtv-users] Hardware Setup Advice

[Michael T. Dean]

On 05/23/2012 02:28 PM, Steven Adeff wrote:
> On Wed, May 23, 2012 at 2:25 PM, Michael T. Dean
> <mtdean at thirdcontact.com>  wrote:
>> On 05/23/2012 02:06 PM, Steven Adeff wrote:
>>
>>> On Wed, May 23, 2012 at 1:31 PM, Mark Boyum wrote:
>>>>> Mike wrote a really nice way to deal with storage groups and having an
>>>>> Archive storage group that Mythtv didn't write to.
>>>>>
>>>>> http://www.gossamer-threads.com/lists/mythtv/users/516083#516083
>>>> I can vouch for that method working well as I had to use it recently.
>>>> It allows you to record to one directory and then move the recordings
>>>> at your convenience to slower storage, a NFS mount in my case.  This
>>>> was done manually in my case but could probably be scripted pretty
>>>> easily.
>>> do you have to change file permissions with this method? I assumed so,
>>> but it is sounding like that assumption may have been misguided?
>>
>> Changing permissions will allow you to make the archived recordings
>> undeletable from within MythTV--but it's better to do that through changing
>> permissions of the recording files rather than the directory (as nothing in
>> MythTV allows you to override per-file permissions, even if the directory
>> allows it).  Other than making a recording undeletable, changing permissions
>> has no benefits as long as you ensure none of your recording rules are set
>> to use the Archive Storage Group (meaning that MythTV will never attempt to
>> write recordings to it).  By not preventing MythTV from writing to the
>> Archive Storage Group directories, you will allow it to write other files,
>> such as preview pixmaps, that you probably do want.  (You would also be able
>> to transcode recordings (though transcoding will ultimately fail since
>> MythTV will be unable to delete the original file, but future versions of
>> MythTV will eventually be able to "successfully" do transcoding, even when
>> they can't remove the original recording file).)
>>
>> Mike
> So by the recording rule not writing to the Archive group, it prevents
> MythTV from attempting to delete a recording from that rule that is
> now in the Archive group? I guess that is where my confusion in this
> lay, and I'd hate to see one of those recordings deleted.

No, recording rule specifies where MythTV writes the recording, so not 
using Archive Storage Group in rules just means MythTV won't record to 
there.

Changing permissions of the individual recording files when you move 
them to the Archive Storage Group can prevent MythTV from deleting them 
(the same as changing the permissions of the Archive Storage Group 
directories would allow, but by allowing write permissions on the 
directory, you're not preventing MythTV from creating preview pixmaps 
for the archived recordings).

Mike