Jens Axboe wrote:
On Mon, Jan 30 2006, Bill Davidsen wrote:
Please take this as a question to elicit information, not an invitation
for argument.
In Linux currently:
SCSI - liiks like SCSI
USB - looks like SCSI
Firewaire - looks like SCSI
SATA - looks like SCSI
SATA will _not_ look like SCSI in the future.
Compact flash and similar - looks like SCSI
? CF adapters are usually IDE, so looks like ATA.
ATAPI - looks different unless ide-scsi used
But it's all besides the point, it doesn't matter what the device
special file looks like (if it's SCSI or not). What matters is that you
talk to the device the same way - and that way is currently SG_IO.
That a device hangs off the SCSI stack because that is the way the
author wrote eg usb-storage is irrelevant. What matters is that you open
the device in question and use SG_IO to talk to it.
Talking about the SCSI stack and ide-scsi completely misses the point.
Jens,
Is there a document that clearly lists how these components (SCSI,
SG_IO, ATA/PI etc et al) connect together and what protocol / transports
they use? I suspect the problem with all these current arguments is that
very few people understand how this all works / connects. I think alot
of people equate kconfig options with how the stuff works under the hood
(even though a number of these config options are badly named to say the
least).
Matt
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