My ReadyNAS Duo runs Linux: 

kev...@mypc:/$ ssh mynas
kev...@mynas:/$ uname -a
Linux mynas 2.6.17.8ReadyNAS #1 Tue Jun 9 13:59:28 PDT 2009 padre \
unknown
kev...@mynas:/$ free
             total       used       free     shared    buffers
cached
Mem:        487808     453392      34416          0      94944
205840
-/+ buffers/cache:     152608     335200
Swap:       255968        320     255648


(you have to run a patch from Netgear to access the system, since then
I've seldom used the web interface)

The processor is a little slow but is ok for me.  I upgraded the RAM
from 256 GB using a 2nd-hand 512 GB (only 1 slot.

You might prefer a unit that does RAID5 rather than RAID1 but there's
only a 50% increase in capacity when filling a box that will hold 4
discs from the basic 3 discs.  I doubled my box's capacity by stepping:
 single 500 GB - as supplied
 500 GB + 1 TB - 2nd drive provided under a promotion some weeks later
 1 TB + 1 TB - for the cost of one drive

I removed some plastic from the front of the caddies that used a wedge
system to jump the caddy catch.  When the wedge got a little dusty it
all jammed up.  Now I can jump the catch with a biro.

One feature you may want that the Duo doesn't have but some boxes do is
a 2nd Ethernet adapter.  I presume with 2 adapters you can use the box
to do some firewalling / DMZ sort of stuff.

Cheers,

Kevin.

On Sun, 2009-11-08 at 15:51 +1100, Sridhar Dhanapalan wrote:
> 2009/11/8 Kevin Shackleton <kev...@reachnet.com.au>:
> > Save the environment - buy a NAS.
> >
> > (my mirrored 2-disc NAS averages about 20 W)
> 
> That's a good suggestion. My reluctance to use a NAS myself stems from
> the perception of less configurability. Are they any good and
> affordable NAS solutions out there that allow a decent level of
> configurability and permissions-setting?
> 
> Something based on FOSS would be preferable.
> 

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