"Anthony Barbachan" <barbacha@Hinako.AMBusiness.com> writes:
> I figured that with 40 wires missing the chipset or drive wouldn't allow
> UDMA-66 anyway or that the drive would immediately stop working thus
> preventing data curruption. If this is not the case and the drive can get
> messed up then I would agree with defaulting to UDMA-33. Although I still
> think the appropiate speed should be retrievable from the BIOS if not the
> chipset itself. Another option is to allow the user to configure the
> default from make menuconfig.
Are those 80-ribbon cables by themselves marked/keyed in any way?
If so, the chip set would need support to read the key.
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.
High-frequency technology requires care and thought. It's not about just
switching DC on and off. There's more to it.
-- Matthias AndreeWhere do you think you're going today?
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This archive was generated by hypermail 2b29 : Sun Jul 23 2000 - 21:00:20 EST