[mythtv-users] Storage Group Confusion - When disks get full can myth move recordings?

[William]

David Whyte wrote:
> Hi,
>
> I have a single 'Default' storage group, which has three drives under
> it (300GB, 500GB, 50GB).  Tonight, my single backend was recording two
> shows from the same DVB-T card (2 different channels, same multiplex)
> and was writing each show to a different disk.  One of the disks got
> completely full but both recordings stopped writing to disk.  This
> looks like a bug in the recorder, but I wonder if it is a known
> problem in 0.21 (ubuntu hardy)?  Anyone able to confirm?  Is it just
> an underlying problem caused by using the one single tuner?
>
> The main problem I have though is that the other two drives had spare
> space and about 40 recordings in the deleted recording group.  Is
> there any inbuilt way (or community supplied scripts that work with
> 0.21) to move smaller recordings from a drive that is getting full to
> another drive that is not so full?  I have my storage group set up to
> ensure there is 7GB of free space on each disk, if this factors in at
> all.
>
> On the whole, I find it a little confusing to understand (and
> therefore manage) how mythbackend is selecting disks for recording but
> this is likely my own fault not a complaint.  Are there any hints from
> the community on how to best ensure that you always have enough
> capacity on your disks?  Is it better to not use the 'deleted group'
> since this makes me believe I have plenty of space (if all recordings
> were expired) yet the space may not be on the disk where myth chooses
> to record a large HD recording to.
>
> Thanks for any help,
> Whyte

Although I have not seen your specific issue I have had issues when 
specifying multiple drives in the storage group. I ended up creating a 
multidrive LVM and now allow the LVM code to manage where to write the 
info. I saw a significant increase in the write speed with multiple 
recording over the individual drives after doing this.