I tried to add this drive to an actual 3 disks RAIDZ already composed of a WD10EACS-00ZJB0 and a WD10EADS-65L5B1. The performance was horrible.
You can check a similar iostat output showing the long wait times in:
While the other 512-byte sector HDDs were reading/writing at 30MB/s sustained, this EARS model did not exceeded the 1MB/s barrier.
I know for sure that this is related to the 512-byte sector firmware emulation, because the disk works perfectly well if I partition it in a 4k-sector alignment.
The thing is that even in that way, using it in a ZFS RAIDZ configuration the performance is very poor because RAIDZ uses a dynamic stripe size.
The bottom line here is that folks like me, that use different versions of Unix, need the firmware to present the disk as a 4K-sector disk to unleash the full potential of the technology. The OS is already prepared to support that sector size, no need for emulation here.
Could you please release a firmware version with no emulation whatsoever? Just the real thing.
Thanks in advance.
Leandro Vanden Bosch.