Re: [RFC][PATCH] sata_mv: harddisk activity led no longer responsive on QNAP TS-109

[Frans Pop <elendil@planet.nl>]

On Sunday 01 March 2009, Martin Michlmayr wrote:
> * saeed bishara <saeed.bishara@gmail.com> [2009-02-24 11:33]:
> > What I think is that this issue is seen with the specific disk that
> > you have, the chip blinks the LED depending on the BUSY bit status,
> > and I suspect that with the disk you have does clear that bit
> > immediately after receiving the command FIS, so the LED will be off,
> > though the command is not completed yet, and this makes the led
> > responsiveness differ that in NCQ-disabled mode.
>
> The LED issue was reported by two people on the QNAP forum the other
> day.  I asked what disks they had and one has a WDC WD7500AACS-00D6B0
> whereas the other one has a WDC WD10EADS-00L5B1.  Do you also use a
> WDC disk, Frans?

I always was rather doubtful of Saeed's analysis (with all due respect), 
but it's good to see confirmed that the same problem manifests with other 
disks too.

I have a completely different HD:
Model Family:     Hitachi Deskstar T7K250 series
Device Model:     HDT722516DLA380
Firmware Version: V43OA91A
User Capacity:    164,696,555,520 bytes

Cheers,
FJP