Re: 8 milliseconds minimum gap between two consecutive disk I/O

Mark Hahn (hahn@coffee.psychology.mcmaster.ca)
Mon, 3 Jan 2000 19:15:13 -0500 (EST)


> IDE doesn't provide for multiple queued commands, disconnect, reconnect,
> etc. If you want this, you use SCSI. IDE is like a big floppy.

interestingly, everything in that statement is wrong. the current
ATA spec *does* provide for command queueing and dis/re-connect.
afaik, no OS uses those features yet, and it might be that no disk
implements them yet either. ATA's still 1 or 2 devices/chain, though,
and cable <= 18".

regards, mark hahn.

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