On Thu, Aug 06, 2009 at 10:56:44PM +0300, Alexander Motin wrote:
Juergen Lock wrote:
So I tested esata on a siis pcie card with a 750G Seagate Freeagent Pro
drive and it does work - until the drive falls into powersave mode
after being idle for a little while. :( (I had the drive on 1394
before on another box where it was able to recover from this condition,
but not on usb or esata - and the drive's 1394 interface died a while
ago and also esata is faster anyway...)
So my question is, could the same be done in our ata code?
I have a slight :) hope it would help this drive too at least as it
does seem to work on Linux...
I am not sure it is related to your case, as you said your drive works
for some time after plug. If drive spun-down automatically due to
inactivity, it should spin-up automatically also, as OS unable to track
that transition. 30 seconds of ATA command timeout should be sufficient
for drive to do this. Do you have any other symptoms?
I believe this patch is for something different. Certain drives are
automatically spun down at power up. One such drive is in my satellite
provider's DVR. If you hook it up to regular SATA and power, it will never
spin up. It requires a special ATA command to tell it to spin up. I
believe the linux patch does precisely this. I know there's a special
SATA power cable that tells the drive not to spin up until given the spinup
command, which I also found in my satellite provider's DVR. Basically this
is done through pin 11: