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Interface transfer rates VS. Burst transfer rates…
Can anyone explain to me what the difference is, and how it affects my FCP workflow?
on the specs for my eSATA drive, it says the interface transfer rates are up to 3Gbits/s (300MB/s)
and burst transfer rates are up to 115MB/s whereas Firewire 800 is up to 85MB/s. So they seem pretty similar in speed, and eSATA isnt really that much of a boost?
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3 Replies
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I’m not versed on those specs per se, but there’s no doubt that SATA connections with the same physical hard drive are faster than FW 800… I’ve seen that here a lot.
Might download AJA’s system test from their support area, and run the HD speed tests… that will tell the tale…
Jerry
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Author: “Jerry Hofmann on Final Cut Pro 4” Click here
8-Core 3.0 Intel Mac Pro, Dual 2 gig G5, AJA Kona SD, AJA Kona 2, Huge Systems Array UL3D, AJA Io HD, 17″ MBP, Matrox MXO, CD’s
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The theoretical transfer rates of a bus (say FW vs SATA) have little to do actually with the throughput… that is what matters. FW has extremely fast specs, but drives will top out at rates much lower than what the bus is capable of. The actual throughput of a FW drive is going to top out around 50 mb/sec, where the SAME drive if it has a SATA connection will be around 80 mb/sec…
Jerry
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[Josh Evans] “So they seem pretty similar in speed, and eSATA isnt really that much of a boost?”
Josh, how exactly are you measuring speed?
Maximum throughput for a single Firewire 800 drive = 100MB per second. Maximum throughput for a single SATA 2 drive is 300MB per second. In theory that’s 3X faster. It’s not quite 3X faster in reality, but close. However, the real boost in realtime editing performance comes when striping two or more SATA drives together.
David Roth Weiss
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Los AngelesPOST-PRODUCTION WITHOUT THE USUAL INSANITY ™
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