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Date:      Fri, 28 Nov 2014 11:44:44 -0500
From:      Allan Jude <allanjude@freebsd.org>
To:        freebsd-virtualization@freebsd.org
Subject:   Re: Unsupported cmd:c4 (ada0:ahcich0:0:0:0): READ_MUL. ACB: c4 00 00 00 00 40 00 00 00 00 01 00
Message-ID:  <5478A67C.7030904@freebsd.org>
In-Reply-To: <C47B8B4E-5127-4121-BC73-2B4E6129652B@develooper.com>
References:  <C47B8B4E-5127-4121-BC73-2B4E6129652B@develooper.com>

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On 2014-11-28 05:42, Ask Bj=C3=B8rn Hansen wrote:
> Hi everyone,
>=20
> I=E2=80=99ve spent some time off this week upgrading my build-my-person=
al-NanoBSD-image tool from a VMware virtual machine to a physical box run=
ning a 32-bit build-box under bhyve.
>=20
> So far so good =E2=80=94 all that has been working really well.
>=20
> My nanobsd image is only used on Soekris and PC Engines boxes and my pr=
oduction images are really small (some <100MB storage and ~32MB memory), =
so I have a crufty kernel config that excluded a bunch of stuff I (though=
t I) don=E2=80=99t need.
>=20
> Now I=E2=80=99d like to run my built image under bhyve for testing. It=E2=
=80=99s easier for me if the disk comes up as an ada device, so I=E2=80=99=
m using ahci-hd instead of virtio-blk. With virtio-blk the system boots b=
ut the device has the =E2=80=9Cwrong" name.
>=20
> With ahci-hd it can=E2=80=99t read my partition for some reason.
>=20
> I=E2=80=99ve tried with both file and zvol backing store.
>=20
> This is the error I=E2=80=99m getting:
>=20
> ada0: <BHYVE SATA DISK 001> ATA-8 SATA 2.x device
> ada0: Serial Number 123456
> ada0: 300.000MB/s transfers (SATA 2.x, PIO4, PIO 8192bytes)
> ada0: Command Queueing enabled
> ada0: 260MB (532480 512 byte sectors: 16H 63S/T 528C)
> ada0: Previously was known as ad4
> Unsupported cmd:c4
>                   (ada0:ahcich0:0:0:0): READ_MUL. ACB: c4 00 c1 1f 08 4=
0 00 00 00 00 04 00
> (ada0:ahcich0:0:0:0): CAM status: ATA Status Error
> (ada0:ahcich0:0:0:0): ATA status: 41 (DRDY ERR), error: 04 (ABRT )
> (ada0:ahcich0:0:0:0): RES: 41 04 00 00 00 40 00 00 00 00 00
> (ada0:ahcich0:0:0:0): Retrying command
> Unsupported cmd:c4
>=20
>=20
> Any suggestion for what I=E2=80=99m doing wrong? Did I compile my kerne=
l with some idiotic set of not-working options?
>=20
>=20
> Ask
>=20
> _______________________________________________
> freebsd-virtualization@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-virtualization
> To unsubscribe, send any mail to "freebsd-virtualization-unsubscribe@fr=
eebsd.org"
>=20

When using zvols, you must set the 'volmode' to 'dev', otherwise GEOM on
the host locks the disk and causes all kinds of interesting things to
happen.

Note: the volmode property is only applied when the device is created,
so you might have to 'zfs rename' it to cause it to be recreated

--=20
Allan Jude


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