Also, 66MB/s is UDMA4, not 5. Defined by ATA/ATAPI-5, but UDMA4. Just to be correct. And confusing. At the same time.
_________________ This weeks pet peeve: Using "voltage" instead of "potential", which leads to inventing new words like "amperage" instead of "current" (I, measured in A) or possible "charge" (amperehours, Ah or Coulomb, C). Sometimes I don't even know what people mean.
The IT8212 is unique among cheapo "RAID" chipsets in that it is really an honest-to-god hardware RAID controller. It does real hardware acceleration of striping and mirroring operations. (very important for mirroring, as you only need to send the data to the card once, and the card takes care of duplicating it -- in software raid-1 you have to send the data twice). There's no RAID-5 parity acceleration, but that would be impossible to do in a controller this cheap. =)
Every other cheapo "RAID" controller on the market is really a "fakeraid" controller, where it just uses a proprietary software RAID driver in the BIOS for startup, and then needs to load a proprietary software RAID engine in the OS on boot.
Unfortunately it looks like AmigaOS4 has only very limited support for the IT8212, which is a damn shame -- without a lot of logic one could have it support RAID on the Amy. =3
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olegil 
