[mythtv-users] Hardware Setup Advice

[Michael T. Dean]

On 05/24/2012 02:08 PM, Simon Hobson wrote:
> David Crawford wrote:
>
>> Would that mean you would ideally want 20 storage groups per disc for 
>> 20 streams or 20 spread over the various disc's your using?
>
> As others have said, one

directory (or multiple directories)

> per disk.

all in one Storage Group

>
> What you don't want to do is create multiple filesystems on one disk 
> and use them separately. Doing that guarantees large head movements 
> during seeks - probably larger on average than using one filesystem.
>
> Eg, if you divide a disk into 4, and have four recordings going, then 
> you are guaranteed to have to seek to multiple places in the first 
> quarter, multiple places in the second quarter, multiple places in the 
> third quarter, and multiple places in the last quarter - each second. 
> Thus you will **always** have seeks that span over half the disk.
> With a single filesystem, then you are likely to have large seek 
> distances, but not guaranteed.
>

Right.  The above just to reiterate, you only need /one/ Storage Group, 
with lots of directories pointing to lots of file systems.

Mike