On Wed, Jul 19, 2006 at 12:43:21AM -0400, Matty wrote:
> 
> A good SMART implementation combined with a decent sensor framework can 
> also be useful for dealing with these conditions. Smartmontools is 
> currently able to send E-amil when the ambient temperature of a disk 
> drive goes beyond the recommended thresholds. I am hopeful the Solaris 
> SMART implementation will take temperature into account, since modern 
> disk drives run hot, and fan failures aren't all that uncommon.
> 

Hopefully, but I believe the only supported (public) SMART interface is
the 'predictive failure bit'.  Each drive vendor has a slew of other
internal variables, but they don't publish the specs because they
generally don't want folks second-guessing their internal algorithms.

However, I believe there is also a SCSI environmental sensor protocol
that can do things like temperature monitoring that we'll also want to
incorporate in future diagnosis engines.

The current thumper-specific diagnosis engine does this, but we're
working on generalizing the framework and more tightly integrating with
ZFS.

- Eric

--
Eric Schrock, Solaris Kernel Development       http://blogs.sun.com/eschrock
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