Edited by giox969 at Thu Aug 20, 2015 16:33 |
Thank you for answering. I think your answers brought me in the right way.
The Samsung HDD: the errors were a bit different: I cannot see 1,5Gbps fallback in speed at the end of the write errors. I can see only SATA write errors that occours during writes. After exchanging the power supply with another 2A (the same max current as the previous one!), these errors went away, and the Samsung HDD is now working fine. It was a power supply problem.
The Hitachi HDD: still experiencing the error reported on my 1st post, but only one time after a reboot and a "big" write. As you can see from the log, the kernel fallback to 1,5Gbps. After this fallback, the Hitachi HDD works fine for all its life, even after a spin-down and spin-up. I'm still investigating on it.
edit: as a workaround I added kernel parameter libata.force=1.5 in uEnv.txt, so I have no longer SATA speed fallback.
Than you again.