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

[Steven Hartland]

On 06/10/2017 08:32, Graham Menhennitt wrote:
> 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)
>
If that fixes its most likely your cabling is the most likely cause.

     Regards
     Steve