Jeff Garzik wrote:
Mark Lord wrote:
This patch adds support to libata for the "power-up in standby"
mode where a "spin up now!" command (SET_FEATURES) is needed.
With this, libata will recognize such drives, spin them up,
and then re-IDENTIFY them if necessary to get a full/complete
set of drive features data.
Drives in this state are determined by looking for
special values in id[2], as documented in the current ATA specs.
Signed-off-by: Mark Lord <mlord@xxxxxxxxx>
applied
though I'm curious where the verify step went, that was in the previous
rev of the patch
Hi Jeff,
The difference between this patch and the first RFC version,
is that I've dropped the code that attempted to deal with
the *other* kind of power-up-in-standby that some drives use.
That form is enabled with a Jumper setting on the drive
(eg. WD 37GB Raptor drives) rather than through software,
and I was unable to figure out exactly what they wanted
while I still had them here to experiment on.
Those drives are no longer in my possession, so.. no support.
The majority of drives use the software enable/disable form,
which is (still) fully addressed by the patch you applied.
Thanks!
-ml
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