I wonder what the maximum SAS speed of Supermicro's A-Backplanes is. Currently I have SAS-3 HDD's (12 GBit/s, HGST 10TB) on a Supermicro Backplane 826A that is attached on SAS-3-HBA LSI SAS9300 (flashed IBM M1215, IT mode).
ZFS throws alot of errors while reading data and I see increasing ECC error log counter of the HDD's. I never saw errors while writing data.
There are other SAS-2 drives (6 Gbit/s, HDD's and SSD's) attached without any problems.
I was wondering if the backplane is not capable of SAS 12 GBit/s speed. Documentation of the backplane does not say anything about speed. Only the product pages of Supermicro servers with this backplane says "SAS 6Gbps direct-attached backplane".
Could there be any incompatibilities between this HDDs and Backplane/HBA?
Does anyone know how to reduce SAS speed to 6 GBits/s without changing the hardware? Or any hints?
I already changed the cable and replaced a HDD with one of the same type and firmware (HUH721919AL4200).
ZFS throws alot of errors while reading data and I see increasing ECC error log counter of the HDD's. I never saw errors while writing data.
There are other SAS-2 drives (6 Gbit/s, HDD's and SSD's) attached without any problems.
I was wondering if the backplane is not capable of SAS 12 GBit/s speed. Documentation of the backplane does not say anything about speed. Only the product pages of Supermicro servers with this backplane says "SAS 6Gbps direct-attached backplane".
Could there be any incompatibilities between this HDDs and Backplane/HBA?
Does anyone know how to reduce SAS speed to 6 GBits/s without changing the hardware? Or any hints?
I already changed the cable and replaced a HDD with one of the same type and firmware (HUH721919AL4200).