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Calculating data storage

data storage harddrives space

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#1 Marcus Allemann

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Posted 24 March 2016 - 02:10 PM

Heya team,

 

I'm about to go in on a job as a Data Wrangler and it's been long enough for me in between wrangling to lose touch with a reasonable estimate of calculating ROUGHLY what sizes of storage space I should be looking at considering the following:

 

- TV series (53 shooting days)

- 1 camera shoot

- Alexa shooting ProRes 4444 2k on SxS cards (64gb and 32gb) (standard drama, nothing particularly excessive frame rate wise)

 

I'm fighting to get a more exact idea but no one can get back to me with a shooting ratio, script length or any other idea aside from what I know above.

 

SO, I'd be keen to hear if there are any estimates out there from people with a better memory/ more experience than me.

 

otherwise, would appreciate if anyone could point me in the right direction of some resources that have a method for working out a vague calculation based on those bare essentials. Is there a rule of thumb? 

 

cheers


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#2 Phil Rhodes

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Posted 24 March 2016 - 03:31 PM

You need a rough idea of what they expect to shoot, or you're nowhere. You could guess something, but you'd be on very thin ice unless you built in a truly massive safety factor, and even then you could find yourself working under Mr Seven Hours a Day and end up in serious trouble.

ProRes 4444 runs fractionally under 300Mbps, or a bit more than 130GB an hour. Beyond that, it's just multiplication. With a single LTO deck, assuming reasonable supporting gear, you could theoretically keep up with several hours a day, but you need some wiggle room.
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#3 Satsuki Murashige

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Posted 24 March 2016 - 07:39 PM

Use the AJA Data Calculator app: https://www.aja.com/en/family/software

It's the fourth item down from the top. I don't know how you can possibly be expected to estimate the daily byte count without a daily page count or expected shooting ratio.
Maybe the production company has produced a comparable show recently that you can use as a template?
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#4 Marcus Allemann

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Posted 25 March 2016 - 04:08 AM

Assuming I can get my hands on scripts, isn't there a formula used to calculate the number of pages into an amount of material? 

 

I seem to remember something from my loader days on film like that. Then as long as I can hypothesise a shooting ratio it would give me something in the ballpark.


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#5 Brian Drysdale

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Posted 25 March 2016 - 05:09 AM

Usually a script roughly works out at around a minute per page. However, on TV series, the scripts can be over length, script editors claim 5%, but it can be 10% to 15% over length according a film editor friend working on UK television dramas..


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#6 Phil Rhodes

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Posted 25 March 2016 - 05:12 AM

isn't there a formula used to calculate the number of pages into an amount of material?

 

Sort of, maybe, but I wouldn't rely on it.

 

Some people shoot a lot more coverage than others.

 

It's one of those things where everyone seems to think their approach is standard.

 

P


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#7 Mark Kenfield

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Posted 25 March 2016 - 09:00 AM

Well approximate shooting ratios are always going to be a more accurate way to plot out your data needs. However, without that, I'd work off the fact that on a single camera narrative shoot, when the cast and crew are on fire, and you're smashing out scenes - you might just get two hours of material recorded on a single day. So I'd plan around that two hours/day figure lacking better info.

Odds are you'll be over-catered for with that much space on most days, but better safe than sorry,

Cheers,

Mark
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