* AHCI driver prints "D2H reg with I during NCQ" message, what is it?
@ 2007-07-13 15:28 Chuck Ebbert
2007-07-14 4:12 ` Tejun Heo
0 siblings, 1 reply; 2+ messages in thread
From: Chuck Ebbert @ 2007-07-13 15:28 UTC (permalink / raw)
To: IDE/ATA development list
I see this on boot with kernels 2.6.22.1 and 2.6.20.15:
ata1: D2H reg with I during NCQ, this message won't be printed again
But I can't find anything that tells me what it means, or whether
it's a real problem.
x86_64 kernel with controller:
00:1f.2 SATA controller: Intel Corporation 631xESB/632xESB SATA Storage Controller AHCI (rev 09)
and drive:
ata1.00: ATA-7: HDS728080PLA380, PF2OA63A, max UDMA/133
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: AHCI driver prints "D2H reg with I during NCQ" message, what is it?
2007-07-13 15:28 AHCI driver prints "D2H reg with I during NCQ" message, what is it? Chuck Ebbert
@ 2007-07-14 4:12 ` Tejun Heo
0 siblings, 0 replies; 2+ messages in thread
From: Tejun Heo @ 2007-07-14 4:12 UTC (permalink / raw)
To: Chuck Ebbert; +Cc: IDE/ATA development list
Chuck Ebbert wrote:
> I see this on boot with kernels 2.6.22.1 and 2.6.20.15:
>
> ata1: D2H reg with I during NCQ, this message won't be printed again
>
> But I can't find anything that tells me what it means, or whether
> it's a real problem.
That's your firmware transmitting unnecessary D2H Reg FIS during NCQ
command phase. It's minor protocol violation which can be ignored. No
need to worry.
--
tejun
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