-
AJA System Test
So I ran the system test on my Dual 1gig G4 with the ATTO UL3D card and 4 SCSI drives striped across two channels. Getting around 175 MB/sec on the tests. I can run a similar test with the ATTO Benchmark Utility. Does this indicate I will have enough bandwith on the drives for single stream HD? Talking 1080i full rez…or is a G5 necessary?
Rich Rubasch
Tilt Media -
2 Replies
-
Rich
175MB/s from four SCSI drives striped accross the two channels of an Ultra 160 (UL3D) is very good, but not enough for uncompressed 1080i 8bit. You will need to go to Ultra 320 (UL4D) with Ultra SCSI drives – 5 or more on each side or two Raid arrays like Medea or Huge and a G5 with a 133Mhz PCIx slot.
Fred
-
Please remember that the old MAC G4’s with a standard UL3D and the AJA Kona HD card could do uncompressed HD, and you could do short bursts of HD, but for reliable performance, you needed 8 SCSI drives. At the time, only U160 drives were available, and the UL4D was not even supported with the original AJA Kona HD.
But of course Fred is correct – THROW OUT THAT OLD GARBAGE and buy a nice UL4D and a HUGE U320RX if you are doing serious big money uncompressed HD jobs. And if you can’t afford a big drive array like this, and still want to do HD, work with the DVCProHD codec, and you can use the drives your currently have, or even a nice cheapo Firewire 800 drive. But if you are doing a REAL uncompressed HD project, and the client is demanding that you work in uncompressed HD 1080i – THEN CHARGE THEM SOME DAMN MONEY, because if I find out that you are giving away uncompressed HD editing for zero money, we will hunt you down and kill you.
Bob Zelin
Reply to this Discussion! Login or Sign Up