The following reply was made to PR kern/157397; it has been noted by GNATS.
From: Matthias Andree <mand...@freebsd.org>
To: bug-follo...@freebsd.org
Cc:
Subject: Re: kern/157397: [ada] ahci/ada/cam NCQ timeouts on Samsung and
non-disable-ability
Date: Thu, 04 Apr 2013 02:18:58 +0200
Further information requested by Jeremy Chadwick, from the
-stable/-current lists:
> While skimming Linux libata code and commits in the past, the only
> glaringly obvious bug/issue I see is with SB600/SB700 chipsets (the
> hardware revision apparently matters) and port multiplier (PMP) support
> and soft resets.
>
> Are you using a port multiplier? I doubt it, but I have to ask.
I am not using a PMP as far as I know (unless one is buried on my Asus
M4A78T-E main board). It would seem the drives are directly attached to
the south bridge's SATA ports.
>> Why only my Samsung HDD drive triggers this but not the WD drive, I do
>> not know yet.
>
> Please provide "gpart show -p ada1" output, both here and in the PR,
> if you could.
=> 63 1953525105 ada1 MBR (931G)
63 209714337 ada1s1 freebsd [active] (100G)
209714400 800 - free - (400k)
209715200 71680000 ada1s2 ntfs (34G)
281395200 15405 - free - (7.5M)
281410605 488263545 ada1s3 linux-data (232G)
769674150 1183851018 - free - (564G)
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