Unraid Cache 2 SMART health [199]

[b10011]

Hi,

 

I can't get rid of SMART health check errors. First I had 6-drive in 5.25" slot which had poor-feeling Chinese SATA cables. I was sure the problem was with the slot or the poor cables. I ordered good quality (afaik) SATA cables and directly connected my 2 cache SSDs to the MB. I still keep getting those errors, but now only for "Cache 2" disk. I run them in btrfs RAID0 (for higher write speeds). It might not be relevant but I have Dynamix SSD TRIM scheduled to daily.

 

Error code: 199 (UDMA CRC error rate)

Drives: 2x Samsung 860 EVO 2TB

Age of the drives: 5 months

 

btrfs filesystem df:

Data, RAID0: total=384.00GiB, used=131.38GiB

System, RAID1: total=32.00MiB, used=48.00KiB

Metadata, RAID1: total=2.00GiB, used=272.06MiB

GlobalReserve, single: total=26.30MiB, used=0.00B

 

btrfs balance status:

No balance found on '/mnt/cache'

 

Is this a known problem with btrfs RAID0 or with the drives?

What should I try next?

Is the risk of data corruption increased when this keeps happening?

[JorgeB]

3 minutes ago, b10011 said:

or with the drives?

It's a known issue with Samsung SSDs and some AMD chipsets, but Samsung SSDs are very picky with cable quality in general.