[Bug 202712] [cam] [ata] System doesn't recognize older hdd after boot

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=202712

--- Comment #29 from Andriy Gapon <avg at FreeBSD.org> ---
(In reply to Domagoj Hranjec from comment #22)
I think that Bruce Evans is right, the older stack seems to use CHS addressing
in ATA commands that it sends down to the disk. Linux reports the disk as being
"ATA-0" where zero is the major ATA version.
And the new stack is missing this code:
http://fxr.watson.org/fxr/source/dev/ata/ata-disk.c?v=FREEBSD-8-STABLE#L442
and any support for CHS addressing.

I am not sure if it is worth resurrecting that old functionality to support
very old disks.

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