disk errors: CAM status: Uncorrectable parity/CRC error [SOLVED]

[Graham Menhennitt]

On 25/09/2017 08:12, Steven Hartland wrote:
> Depends on your exact setup, see the ata and ahci man pages e.g.
> hint.ahcich.X.sata_rev
> hint.ata.X.devX.sata_rev
> hint.ata.X.sata_rev
> hint.ata.X.devX.mode
> hint.ata.X.mode
>
>     Regards
>     Steve
>
> On 24/09/2017 21:02, Graham Menhennitt wrote:
>> On 24/09/2017 20:47, Steven Hartland wrote:
>>> Try reducing the disk connection speed down to see if that helps.
>>>
>>> On Sun, 24 Sep 2017 at 06:49, Graham Menhennitt 
>>> <graham at menhennitt.com.au <mailto:graham at menhennitt.com.au>> wrote:
>>>
>>>     G'day all,
>>>
>>>     I'm setting up a machine running 11-Stable on a PC Engines APU2C
>>>     board.
>>>     It has a 16Gb SSD as its first disk (ada0), and a Seagate 2Tb SATA-3
>>>     disk as its second (ada1). I'm getting lots of read errors on
>>>     the second
>>>     disk. They appear on the console as:
>>>

Thanks for that Steve. And sorry for taking so long to get back to you.

In my case, adding:

    hint.ahcich.1.sata_rev="2"

to /boot/device.hints seems to have fixed the problem.

My dmesg now says:

    ada1 at ahcich1 bus 0 scbus1 target 0 lun 0
    ada1: <ST2000LX001-1RG174 SDM1> ACS-3 ATA SATA 3.x device
    ada1: Serial Number XXXXX
    ada1: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
    ada1: Command Queueing enabled
    ada1: 1907729MB (3907029168 512 byte sectors)

Whereas previously it said:

    ada1: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)

Thanks again,
     Graham