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SubjectRe: VIA IDE driver, v1.5 (final)
In <20000723182343.A4271@suse.cz> Vojtech Pavlik (vojtech@suse.cz) wrote:
>> If not so (which I assume), you cannot tell if you have the proper cable
>> unless you transfer data and trash it.
>> You might try to actively probe (like reading inquiry data at UDMA/16
>> and UDMA/66 and compare it), but this may succeed, while subsequent
>> transfers fail. You never know.

> Fortunately all UDMA transfers are protected by safe enough CRC to see
> if a transfer fails. This way you can know your cable won't do UDMA/66
> and switch to something slower. (UDMA/44 seems to work on most 40-wire
> cables just fine). If that doesn't work, go even lower. Something like
> modem autobauding ...

If it'll work like modem autobauding here (connect with speed limit=14400
and get 1.5Kbytes/second, connect with 33600 and spend 95% of time for
retrains and thus transfer with 0.1Kbytes/second speed in the end) then
better not...

P.S. Sorry, could not resist...





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