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Might be slightly OT as it isn't necessarily a CentOS related issue. I've been using WD Reds as mdraid components which worked pretty well for non-IOPS intensive workloads. However, the latest C7 server I built, ran into problems with them on on a Intel C236 board (SuperMicro X11SSH) with tons of "ata bus error write fpdma queued". Googling on it threw up old suggestions to limit SATA link speed to 1.5Gbps using libata.force boot options and/or noncq. Lowering the link speed helped to reduce the frequency of the errors (from not getting a sma...

On 03/01/2016 09:53 AM, Emmanuel Noobadmin wrote: > > Since I'm likely to use Reds again, it is a bit of a concern. So > wondering if I just happen to get an unlucky batch, or is there some > incompatibility between the Reds and the Intel C236 chipset, or > between Red / C236 / Centos 7 combo or the unlikely chance WD has > decided to do something with the firmware to make them work on on NAS > and not workstation/server chipsets to make people buy better stuff. > > Anybody has recent experiences with them recently on the...

On 3/1/2016 9:53 AM, Emmanuel Noobadmin wrote: > However, the latest C7 server I built, ran into problems with them on > on a Intel C236 board (SuperMicro X11SSH) with tons of "ata bus error > write fpdma queued". Googling on it threw up old suggestions to limit > SATA link speed to 1.5Gbps using libata.force boot options and/or > noncq. Lowering the link speed helped to reduce the frequency of the > errors (fr...

> However, the latest C7 server I built, ran into problems with them on > on a Intel C236 board (SuperMicro X11SSH) with tons of "ata bus error > write fpdma queued". Googling on it threw up old suggestions to limit > SATA link speed to 1.5Gbps using libata.force boot options and/or > noncq. Lowering the link speed helped to reduce the frequency of the > errors (fr...

...e: > Might be slightly OT as it isn't necessarily a CentOS related issue. > > I've been using WD Reds as mdraid components which worked pretty well > for non-IOPS intensive workloads. > > However, the latest C7 server I built, ran into problems with them on > on a Intel C236 board (SuperMicro X11SSH) with tons of "ata bus error > write fpdma queued". Googling on it threw up old suggestions to limit > SATA link speed to 1.5Gbps using libata.force boot options and/or > noncq. Lowering the link speed helped to reduce the frequency of the > errors (fr...