Messages in this thread | | | Subject | Re: VIA IDE driver, v1.5 (final) | From | Matthias Andree <> | Date | 23 Jul 2000 17:57:55 +0200 |
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"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 Andree
Where do you think you're going today?
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