[mythtv-users] RAID 1 mirror with mythtv backend???

[James Abernathy]

On 1/25/19 6:37 PM, Will Dormann wrote:
> On 1/24/19 12:05 AM, Stephen Worthington wrote:
>> Those are CRC errors, and in a large quantity like that they are
>> normally indicative of a bad SATA cable (or one that is not firmly
>> plugged on).  Or possibly a USB cable problem in this case.  Dirty
>> connectors will also show up like this, and having the cat tread on
>> the cable can also do it.
>>
>> If the cable is OK, then the next most likely candidate for the cause
>> is a bad SATA port.
>
> I concur here.   From your SMART report:
>
>    5 Reallocated_Sector_Ct   0x0033   100   100   005    Pre-fail
> Always       -       0
> 196 Reallocated_Event_Count 0x0032   100   100   000    Old_age
> Always       -       0
> 197 Current_Pending_Sector  0x0022   100   100   000    Old_age
> Always       -       0
> 198 Offline_Uncorrectable   0x0008   100   100   000    Old_age
> Offline      -       0
>
> All of your raw values (the last column) are 0.   This implies that the
> drive itself is internally fine.  Which generally leaves the SATA
> controller and/or cable.
>
> Additionally from your report:
> SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 1.5 Gb/s)
>
> I assume that your controller is only SATA 1.0?   If not, then that's a
> likely sign that your cable is bad enough that the drive negotiated down
> to a slower speed due to unreliable communications.
>
>
> -WD


The controller is part of the Sandy Bridge chipset so it's 2 SATA 6GBs 
and 4 SATA 3GBs.  So I moved the drive in question to another test PC 
with same controller and new Cable, the locking kind. Then ran the 
smartctl -t long and it came out complete good.

I have also replaced my cables on the 2 locations in question in my 
production system. No issues yet there.

So I'm going to leave things untouched for a month and see what happens

Jim A