[mythtv-users] Partition resizing gone wrong - All storage groups gone (on the same partition)

[Stephen Worthington]

On Thu, 12 Sep 2013 17:02:50 -0400, you wrote:

>On Thu, Sep 12, 2013 at 1:37 PM, Stephen Worthington <
>stephen_agent at jsw.gen.nz> wrote:
>
>> Resizing partitions with data in them is always hazardous - if you
>> value the data, you need to back it up first.  Which is always a
>> problem with recordings, as they are usually huge files and need a
>> huge drive to backup to.
>>
>> What I would recommend is when creating a recording partition, use a
>> separate drive and set the partition to use the entire drive, or at
>> least all remaining space on the drive.  And then never resize it.
>>
>
>I've had previous success moving and resizing partitions before, mainly in
>Windows but also with Linux filesystems, and I think it gave me a false
>sense of security.  The next time I attempt something like this, if I ever
>attempt it at all, I'll just back up the data beforehand, then just format
>the newly sized partitions and transfer the files back.  This time, I was
>lazy and I told myself it didn't matter that much.  I had seen almost all
>of the videos and really only lost one that I didn't see.  It was really
>only about 200 GB of files, all standard definition, and most of the reason
>they were large in size is because the majority were recorded in all their
>grainy glory with my aging PVR-500.  So, I'm fortunate.  It could have been
>much worse.

You clearly are not recording anything HD.  I have a PVR-500, and I
used to get recording file sizes of around 2.2 - 2.3 Gibytes per hour
(65 minutes with pre- and post-roll).  With digital SD recordings from
the same sources, the sizes vary quite a bit depending on the bit rate
of the channel I am recording and the programme being broadcast, but
they are of the order of 1.1 - 1.7 Gibytes per hour.  But HD
recordings (1080i) are 4.1 - 5.3 Gibytes per hour.

>I did have to deal with mythbackend and the missing files, but fortunately
>Raymond's find_orphans.py script helped me out of the woods.  I don't see
>any issues yet.

Yes, find_orphans.py is an essential tool for any MythTV setup that
has been around for a while.  I think the packagers should start
installing it by default.

>I successfully recorded a show last night, and live tv seems to be working
>for me as well as it did before.
>
>Thanks for the advice.  I knew I was taking a risk when I clicked the
>button, but I really should have taken an hour or so to move all those
>files off beforehand.