dillon@CORY.BERKELEY.EDU (Matt Dillon) (12/27/86)
>> >>... The blitter is used to decode [data from the read track], >>usually a sector at a time, and it achieves this decoding in one >>blitter pass (though as I recall, it takes three passes to encode the data). > > Which explains why copying disk to RAM: is so much faster than RAM: >to disk. (I have a single drive system -- could you tell?) > Well... actually that's not the reason. The reason is that when you are writing to disk, the data on the track must first be READ, then re-written (since you are not modifying the ENTIRE track, only several sectors on that track). -Matt
jec@iuvax.indiana.EDU (01/05/87)
Can't you just plug in a SCSI disk into a SCSI controller? I thought this was the whole point of a SCSI controller! Ditto with fnf about MMU's.