Messages in this thread | | | Date | Thu, 28 Jun 2001 03:05:03 +0200 (MET DST) | From | Andries.Brouwer@cwi ... | Subject | Re: Patch(2.4.5): Fix PCMCIA ATA/IDE freeze (w/ PCI add-in cards) |
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From: Andre Hedrick <andre@aslab.com>
You know yourself first and all the screwed up ATAPI products that are still using SFF-8020 that has been obsoleted before I start maintaining the subsystem three plus years ago.
Hi Andre -
Why precisely is complying to SFF-8020 broken? That was the standard. The standard that Microsoft required. Other people made a different standard, and claimed that theirs was better or more official or whatever, but reality is that the products were not manufactured following this so-called better standard. You are a good disciple of Hale, but it is no use ignoring the fact that a very large number of devices was made following SFF-8020. These devices are not necessarily screwed, they tend to work fine, although both ATA and ATAPI devices have their quirks.
SFF-8020, later INF-8020, became part of ATA/ATAPI-4 (1998). The T13 people that merged SFF-8020 and produced ATA/ATAPI-4 changed a few details about how a master is supposed to react when a nonexistent slave is selected. Nobody really noticed, and ATA/ATAPI-5 still had the same requirements. But then long discussions about this difference caused ATA/ATAPI-6 to go back to the original SFF-8020 requirements. Do you disagree with this description of history? If you agree then it is not SFF-8020 but ATA/ATAPI-4 and ATA/ATAPI-5 that today must be considered broken in this respect. I am referring to Section 9.16.1 of these standards.
Maybe there are other things in SFF-8020 that you consider broken?
Andries
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