[mythtv-users] Planning Tuners and Disk I/O for a MythTVBackend System

[Ben Kamen]

On 2/7/2010 9:37 PM, MythTV wrote:
>
>>> That leads me to believe that the practical number of physical tuners
> for a PVR system can
>>> be limited by disk IO throughput, and should be an important
> consideration when designing,
>>> and using the system.
>
>> No. You can probably put a dozen digital tuners in a system before you
> might have to
>> worry about exceeding the throughput of a single modern hard drive.
>
> Absolutely.. but..
>
> Recording speed with 12 tuners requires 12 concurrent streams to be
> written to the disk.  The
> bottleneck becomes the seek times and rotational latency.
>
> If noise and cost wasn't a problem you would go for 15K RPM drives just
> to ensure latency
> and seek times are minimized.

Could always start striping drives in a raid 0 kinda deal. :D

  -Ben