That's strange, I expected the SMART test to show some issues. Personally, I'm still not confident in that drive. Can you check cabling? Another possibility is that there is a cable that has vibrated into a marginal state. Probably a long shot, but if it's easy to get physical access to the machine, and you can afford the downtime to shut it down, open up the chassis and re-seat the drive and cables. Every now and then I have PCIe cards that work fine for years, then suddenly disappear after a reboot. I re-seat them and they go back to being fine for years. So I believe vibration does sometimes play a role in mysterious problems that creep up from time to time. On Mon, Jan 18, 2016 at 5:39 AM, Alessandro Baggi <alessandro.baggi at gmail.com> wrote: > Il 18/01/2016 12:09, Chris Murphy ha scritto: >> >> What is the result for each drive? >> >> smartctl -l scterc <dev> >> >> >> Chris Murphy >> _______________________________________________ >> CentOS mailing list >> CentOS at centos.org >> https://lists.centos.org/mailman/listinfo/centos >> . >> > SCT Error Recovery Control command not supported > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos