> Not that simple. Most disks don't spin up on SYNCHRONIZE_CACHE if its
> cache is clean. Sadly some disks actually spin up when it receives spin
> down command while spun down to immediately spin down again, so we would
> be fixing problem for some number of disks while breaking others. :-(
Snoop the last command sent to the drive, that tells you if you can skip
the cache flush ?
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