Jim Sez:
> Like many others, I've come close to making a home
> NAS server based on 
> ZFS and OpenSolaris. While this is not an enterprise
> solution with high IOPS 
> expectation, but rather a low-power system for
> storing everything I have,
> I plan on cramming in some 6-10 5400RPM "Green"
> drives with low wattage 
> and high capacity, and possibly an SSD or two (or
> one-two spinning disks) 
> for Read/Write caching/logging.
Hey! Me  too! I'm up to buying hardware new to make it run.

Having read through the thread, I wonder is the best solution
might not be to make a minimal NAS-only box with a mirrored
pair(s) of drives for the daily updates, and spinning this off
at intervals via cron jobs or some such to long(er) term and 
safer storage in a second system that's the main raidz 
repository. 

Sure it's more elegant to have the momentary cache and safe
repository on the same set of hardware, but for another
$200 one can get a second whole system to work as the cache
and take all the on/off cycles, then power on the main backing
store system when something from deep freeze storage is 
needed, but keeping the recent working set in the cache 
system. 

This lets you schedule (for cheap electricity) the operations
of the deep freeze backing storage, while keeping its disks
mostly off, and minimizing power cycles on the disks down
to as little as 1/day.

Elegance is nice, but there are some places where more 
hardware can take it's place more quickly. 

Can you tell I'm at heart a hardware guy? 8-)
-- 
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