Chad A. Fernandez <[EMAIL PROTECTED]> wrote:
> [...]
> My system is all SCSI and I have often wondered what the
> disconnect/reconnect thing is. I sort of figured it was the "bios" part
of
> a hotswap setup. Hotswap also would need the correct hardware, and
software
> too, I suppose.
>
> I had no idea that ATA also supports it.
Disconnect is the ability for the controller (host adapter) to issue a
command to a device (drive) and move on rather than waiting for completion.
SCSI, being an "intelligent" interface, had enough brains on the drives
themselves that they could carry out commands, then notify the controller
when completed. This allowed adequately sophisticated operating systems
(multitasking) to do other things rather than waiting for the relatively
slow drives to complete operations, including issuing a series of commands
to multiple drives (something else SCSI is extremely good at).
I would dearly love to have an all-SCSI system, but they're still to pricey.
IDE/ATAPI does the trick well enough for an affordable price.
- Bob
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