Spin down HDD after disk sync or before power off

[Oliver Fromme]

Alexander Best wrote:
 > imo this patch takes good care of the problem. would be nice to
 > have it in HEAD.

No -- *Please* make sure that the disks are only spun down
upon an actual power-off command (i.e. when reboot() is
called with the RB_POWEROFF flag).  In all other cases the
disks should keep running.  It's not good to have the disks
spin down and then immediately spin up again on every
reboot.

Best regards
   Oliver

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Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M.
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