From owner-freebsd-scsi@FreeBSD.ORG  Sun Feb 12 18:05:38 2012
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Date: Sun, 12 Feb 2012 22:05:35 +0400
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From: Stas Orlov <sennaar@gmail.com>
To: "Desai, Kashyap" <Kashyap.Desai@lsi.com>
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Cc: "freebsd-scsi@freebsd.org" <freebsd-scsi@freebsd.org>,
	"freebsd-current@freebsd.org" <freebsd-current@freebsd.org>,
	"Kenneth D. Merry" <ken@freebsd.org>, Dennis Glatting <freebsd@penx.com>
Subject: Re: LSI supported mps(4) driver available
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> Out of those six Drive, one drive is detected as "1.5Gbps" (see below par=
t in dmesg log)
>
> =C2=A0 =C2=A0 =C2=A0 =C2=A0PHY[8].AttachedDevHandle: 0x0009
> =C2=A0 =C2=A0 =C2=A0 =C2=A0PHY[8].LinkRate: 1.5Gbps (0x80)
> =C2=A0 =C2=A0 =C2=A0 =C2=A0PHY[8].PhyStatus: NewTargetAdde
>
> LSI IR does not support mix of mix of different link speed Drivers in a s=
ingle Volume.
> I am not sure if this is root cause of the issue, but definetly worth to =
try why that Particular drive is
> At 1.5 Gbps link ?
>
> Can you try to see if it is cable which is causing link to 1.5 OR Drive i=
tself has 1.5 Gbps max speed. ?
>

All six of them are SEAGATE ST9300603SS FS62, 1.5Gbps speed is quite odd.

Can't check cabeling right now, I'll exclude that drive from tests for now