Fixing suspend timer: where to stash io counter stats?

[Phillip Susi]

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The disk suspend timer feature fails to work on many drives because
they have a 10 minute minimum suspend timer, and udisks tries to poll
the SMART status every 10 minutes, which resets the timer.  To fix
this, I'm trying to capture the io counter stats to see if there has
been no IO to the disk since the last housekeeping run, and if not,
skip the SMART check.  The trouble is I can't find any structure to
save the old value in.  Any suggestions?

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