On Tuesday 25 August 2015 07:20:05 Mark Lord wrote:
> On 15-08-01 09:45 PM, Robert Hancock wrote:
> >On Sat, Aug 1, 2015 at 2:09 PM, Pali Rohár <pali.rohar@xxxxxxxxx> wrote:
> >>On Thursday 25 December 2014 07:22:13 Robert Hancock wrote:
> >>>On Tue, Dec 23, 2014 at 1:51 PM, Pali Rohár <pali.rohar@xxxxxxxxx>
> >>>wrote:
> >>>>Hello,
> >>>>
> >>>>I have nvidia nforce4 motherboard with nvidia sata controller:
> ..
> >>>It looks like something is trying to issue a command to disable APM
> >>>power management on the drive, and the command fails (likely because
> >>>it doesn't support that command).
> ..
> >> /sbin/hdparm -B254 $DRIVE
> >>
> >>And that -B254 cause above error message in dmesg log. Output from
> >>hdparm is:
> >>
> >> /dev/sda:
> >> setting Advanced Power Management level to 0xfe (254)
> >> APM_level = not supported
> ..
> >> $ sudo hdparm -I /dev/sda | grep -i power
> >> * Power Management feature set
>
> That's not the same as APM ("Advanced" Power Management).
>
> >However, these NVIDIA SATAs are black boxes, and rather buggy ones at that,
> >so it's possible there's an unknown issue there.
>
> I wonder if NVIDIA simply bought out the IP from Pacific Digital
> when they went bust? Pacific Digital invented the original "ADMA",
> and the pdc_adma.c driver in the kernel knows all about it.
> If the IP is pretty similar (identical?) then we could probably
> improve things.
>
Can you check if nvidia ADMA code and that Pacific Digital ADMA code is
similar or not?
--
Pali Rohár
pali.rohar@xxxxxxxxx
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