On Mon, Jan 15, 2018 at 5:41 PM, Paul Kocialkowski <[email protected]> wrote: > Hi, > > I'm using a Lamobo-R1 with the latest stable U-Boot (2017.11) and Linux > (4.14) as a server that runs continuously. It has a SATA disk attached > to the SATA connector and it is powered by the microUSB PSU that was > sold with the board. > > It seems that whenever I try to access the SATA disk with lots of I/O > (say, copying over a very large file, encoding a video, etc), I get a > "Unable to handle kernel paging request" error. > > I suppose it could be that the AHCI code is messing with the page table > when it's under heavy load (probably not very likely), or that access to > the SATA disk requires more power than there is available and causes a > current surge that leads DRAM to be under-powered and corrupt the page > table. > > Note that I have tried lowering the DRAM frequency from 432 MHz to 408 > MHz (increased instability) and 384 MHz (comparable with 432 MHz), so I > definitely believe this is DRAM-related one way or another. > > I have also read https://linux-sunxi.org/Lamobo_R1#Powering_the_board > which indicates that the microUSB power supply is limited to 1.8A and that > the design is "often somewhat unreliable". > > Has anyone experiences similar issues or have some comments to share on > this kind of issue?
Have you tried powering the board directly from the GPIO pins, as described on the wiki page you linked to? ChenYu -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
