Sergei Shtylyov wrote:
Norman Diamond wrote:
[attribution stolen:]
[Norman Diamond:]
It looks like both LIBATA and the old IDE drivers
have an off-by-one error in deciding whether to use
READ SECTOR(S) instead of READ SECTOR(S) EXT.
This was fixed here:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=97b697a11b07e2ebfa69c488132596cc5eb24119
Thank you.
I will see if I can port that fix to 2.6.24.3, because
Slax 6.0.3 and kernel 2.6.24.3 avoided some other bugs of
later kernels.
Note that this doesn't fix it for the IDE core.
That helps explain my subsequent testing. I'm still having problems.
The ide-disk driver however seems to use LBA48 regardless of the sector
address.
But that doesn't explain my subsequent testing. That behaviour would cause
it to work in one of my present cases, but it still fails.
But still there are incorrect capacity checks, and it can fails with
drivers not supporting LBA48 with DMA...
Yeah that could be part of it. 2.6.20 turned on DMA more often than later
kernels, so I'm now thinking of reverting to 2.6.20. I've heard (but
couldn't test personally) that 2.6.20 gave abysmal performance to users of
AMD chipsets. Since Intel users outnumber them, I'm inclined to revert to a
version that worked for Intel even though AMD suffers.
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