Disk Allocation Page Gone

[gregsmith]

Does anyone have a link to the Disk Allocation page that used to be on the Digi site somewhere? You know the one with suggested track-spans for large sessions...I don't seem to be able to find it, has it been taken down I wonder or am I just failing with my search of the site?

Greg

[Andre Knecht]

Meanwhile…

1 minute of mono audio @ 44.1 KHz, 16-bit = 5.05 MB (or 5167 KB)

Using the above formula, one can quickly extrapolate for other sample rates, bit-depths, etc. Plug all of it into a spreadsheet and, voilà, a handy tool that will keep on giving for years.

Of course, nowadays…

If you have an iPhone, you could download one of these apps, which offer a disk-space calculator (among other things):

“Audio Tool” by Performance Audio, $1.99
“AudioTool” by Jordan Pitcairn, FREE
“AudioToolKit” by Tony David cray, $4.99
“Backline Calc” by Audiofile Engineering, FREE

I’m sure there are even more, out there.

IHTH.

[Sean Halley]

Which of course, is why Andre is the Man.

At 44.1K:

1 minute of mono 16 bit, 5 megs
1 minute of stereo 16 bit, 10 megs
1 minute of mono 24 bit, 7.5 megs
1 minute of stereo 24 bit, 15 megs

etc etc...

Not exact of course, but accurate enough for disk space forecasting

[gregsmith]

Very much appreciated chaps but not what I meant. I was refering to looking for the info re recommended tracks per volume for optimum performance. Pertaining to the most data you should have coming off any one drive...maybe to do with the drive/bus speeds/seek times/caches, I'm not sure which. Used to be on the bottom of the page about drives, I think.

PT calculates remaining disk space for the current session anyway, as I'm sure you know

Greg

[crizdee]

Hi,

Whilst we're on the subject! I regularly run sessions with up to bo tracks, 80 audio streams (40 stereo or 80 mono or combinations etc) to a SATA internal drive. Buffer at 512 and i use strip silence so i'm not streaming emptiness from the disk drive

How many tracks do you want to stream? what system are you using?


Chris

[Paolino_o]

Or:
you can calculate the bitrate of your session with

(bit) * (sampling rate) * (number of tracks ACTUALLY playing from drive)

Exmpl: 24bit * 48000Hz * 24trks = 27648000bit/s, or 27.7Mbit/s, or roughly 3.5MB/s

If you use internal drives you can consider an average real world transfer rate of 80-90MB/s

Do your homeworks now

PS:http://avid.custkb.com/avid/app/self...p?DocId=352655 bottom of the page

[Sean Russell]

Wow. That list is OLD! I can regularly get 60+ tracks to playback fine on a Glyph or internal SATA at 88k.

The drives Avid used as 'spec' are not even shipping anymore! I had a client who bought an 80 GB 'avid drive' 7 years ago!!

So maybe we should take that list with a grain of salt. Or two.