« on: July 15, 2007, 02:14:00 PM »
Using the SCSI controller on a CyberstormPPC with good quality cables 2M in length or less and 10,000RPM drives and SFS filesystem I can get sustained disk to disk transfers ~8.5MB/sec. Whats really cool is that, while one large copy operation is happening, I can initiate another large copy operation and see only a tiny drop in overall throughput (none at all if the second COPY is using two disks not being used in the first COPY). Interestingly, the disks themselves can end up being your bottleneck. Also, not a single byte of chipmem is needed and CPU barely utilized (if at all). DMA is indeed a beautiful thing.
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Primary:
A4000T. Phase5 PPC604e-233mhz/060-66mhz. Mediator, Z3 Fastlane, Voodoo5, Delfina, X-Surf, AD516, Peggy Plus.
Collection:
A4000D, A1200, A500, Milan060 (Atari clone), Atari MegaSTE, Atari TT030, C64, C128, Mattel Aquarius, (2) HP Jornada....
