[Bug 270459] SATA Port Multiplier failure

In reply to: bugzilla-noreply_a_freebsd.org: "[Bug 270459] SATA Port Multiplier failure"
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From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 26 Mar 2023 19:45:42 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=270459

--- Comment #1 from Alex Rosenberg <alexr@leftfield.org> ---
I set kern.cam.dflags=127 and kern.cam.debug_delay=5000 from the loader prompt.
The delay doesn't seem to meaningfully slow things down, but when the Z690 is
looping, the following sequence repeats indefinitely:

(pmp0:ahcich8:0:15:0): WRITE_BUFFER/PM. ACB: e8 02 00 00 00 01 00 00 00 00 01
00
(pmp0:ahcich8:0:15:0): CAM status: Unconditionally Re-queue Request
(pmp0:ahcich8:0:15:0): Retrying command, 1 more tries remain
(pmp0:ahcich8:0:15:0): WRITE_BUFFER/PM. ACB: e8 02 00 00 00 01 00 00 00 00 01
00
(aprobe0:ahcich8:0:0:0): SET_MULTI. ACB: c6 00 00  00 00 40 00 00 00 00 01 00
(aprobe0:ahcich8:0:0:0): CAM status: Unconditionally Re-queue Request
(aprobe0:ahcich8:0:0:0): Retrying command, 1 more tries remain
(aprobe0:ahcich8:0:0:0): SET_MULTI. ACB: c6 00 00  00 00 40 00 00 00 00 01 00

I played a bit with debug_delay and got different results with higher values,
but that's probably breaking timings too much.

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