Roger - good to know; thanks!
Bouke - it's about data rate, but it's not simply "xx mB/sec." First, my tests of spinning hard drives show that the inner cylinders typically have 30%-50% lower throughput than the outer cylinders (which is what manufacturers most often publish in their specs.) so I wouldn't count on that $50 drive sustaining that 90 mB/s when it's mostly full. Second, I'll bet that $50 drive won't get anywhere near 10 streams of 50mb/s video if those streams include audio AND they are scattered across the outer, middle & inner cylinders. In this real-world scenario, the big challenge is seek time, not throughput.
It's almost impossible to figure this out theoretically. That's why I'd like to hear what real editors are doing. Thanks!
Yeah, i'm a wise guy….1080 is meaningless in this context.It's about data rate. 50 Mbits XDcamHD (that is 1080) is, well, 50 Mbits, that is 50 / 8 = 6.25 MBYTE per second.A single Toshiba Canvio basics USB 3 drive of one TB (50 bucks) does 90 MB / sec.So that could / should achieve (real world) 10 streams…Now for mobile application, one backup is no backup. Offloading cam originals have to be done to more than one drive/ system, so IMHO, getting a good backup strategy is important, more important than having a protected raid for editing.(that will drop/burn/get stolen/left in hotel/eaten by dog)The Toshiba comes also in 2 TB nowadays, have not tested them yet, but I doubt they will be slower.Now, a couple of those, how much storage does one need on a location job?(In shooting / editing 50 Mbits, one 2 TB drive holds 70 hours of footage….)On Jul 26, 2016, at 13:31, Roger Shufflebottom rogershuff@yahoo.co.uk [Avid-L2] <Avid-L2@yahoogroups.com> wrote:I'm using a G-Raid enclosure with a couple of 2.5" 1TB drives in shuttles running as a striped pair using Apple Disk Utility. At least 5 streams of 1080 reliably (Thunderbolt connection to iMac or MacBook Pro).
Anybody using 2.5" spinning hard drive arrays as storage for Avid editing? I'd like to have some tiny RAIDs for portable editing w. my laptop, and I'd like to hear your experiences if you've done this. P.s. I know SSDs would work fine, but I'm trying to keep the cost-per-TB down by using spindles. Thanks!
Posted by: Wilson Chao <wilsonchao@gmail.com>
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