> Hi
>
> I got kernel errors [1] and [2] followed by SATA reset on heavy load on
> the hard drive connected to the GA-MA790FX-DS5 onboard controller
> Jmicron 20360/20363 (JMB363) (here is lspci [3]). Hard drive connected
> to the another onboard (south bridge from AMD SB600) controller works
> without problem.
>
> I got two 1TB Seagate hard disks, ST31000340AS and ST31000340NS. I
> connected one to Jmicron JMB363, another to SB600. After some testing
> with several instances of bonnie++ I got kernel errors [1] and [2].
> After this I exchanged hard disks connections. The one which was
> connected to JMB363 I connected to SB600 and vs versa. Errors, timeouts
> and hard drive resetting happened always on the hard drive which is
> connected to the JMB363 (in log file it is sdb). There are no errors if
> both drives are connected to the SB600.
>
> Here [4] is complete (before i get errors) dmesg output after system is
> booted.
>
> I already replaced (took from working PC) power supply, memory, video
> card and dvd drive. I get same problems also with this devices. So
> problem must be motherboard, software or CPU. CPU seems to work O.K.
>
> It looks like the problem is motherboard or ahci ata driver. Does
> somebody have any clue about it? Is chip JMB363 broken or linux driver
> is broken?
>
> [1]
http://hurd.homeunix.org/~sena/GA-MA790FX-DS5/dmesg-sata-errors.txt
> [2]
http://hurd.homeunix.org/~sena/GA-MA790FX-DS5/dmesg-sata-errors2.txt
> [3]
http://hurd.homeunix.org/~sena/GA-MA790FX-DS5/lspci.txt
> [4]
http://hurd.homeunix.org/~sena/GA-MA790FX-DS5/dmesg-after-boot.txt
