[mythtv-users] Western Digital Red for Myth

Joseph Fry joe at thefrys.com
Mon Aug 26 15:53:30 UTC 2013


>> I have not done any calculations to see what that limit would mean,
>> for my usage of a MythTV drive, but 55 Tbytes does not seem too small
>> a number.
>
> ...
>
> *Very* roughly: 55,000,000,000,000 / 6,000,000,000 / 365 = 25 1 Hour HD
> Recordings/Day.
> Then divide 25 by 2 for commercial flagging and by 2 again if you actually
> want to watch
> the recording. ~~6 shows/day?  Hmmm, left out some number of preview
> generations/views.

Of course this assumes that all workloads are considered equal.  I
seriously doubt that 55TB's worth of sequential write, and subsequent
reads, of large video files has nearly the same effect on the MTBF as
55TB worth of non-sequential read/write of small files/database
records.


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