[olug] Combining SDD and HDD drives?

[Dan Linder]

My current laptop has a 320GB 5400RPM drive.  Space isn't an issue as much
as speed.   I've had 7200 RPM drives in the past and while they are faster,
I can't justify the purchase of a new drive for a ~5-10% speed-up in my
work.

What I'd love is the 25-35% speed-up a SSD would provide but a 320GB HDD
(even a 256GB) is out of my price range.  That got me to thinking...

My "working set" of these files are fairly small ~80GB, but I can't split
the files across different filesystems for other reasons.

If I could find a filesystem or multi-disk (MD) driver that would allow for
multiple physical drives to be put into a pool, and then the most used
sectors would be stored on the SSD while the rest would be left on the HDD.

I think this is a "hierarchial filesystem" idea, but I can't find any notes
on how this might be setup for my situation.

Any ideas?

DanL

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