Hi everybody,

I admit I'm not following this list with enough attention lately, so
what I'm about to say might already have been proposed and discussed.
Sorry if this is the case.

The other day I was evaluating the possibility to build an home-made
iSCSI SAN based on Linux, old PC and gigabit NICs. It occurred to me
that should be possible to cram more HDs in a single pc if I could put
my hands on an hybrid IDE - Ethernet card, that would carry on-board a
1Gb Ethernet adapter plus and IDE controller, some RAM (for buffering)
and either a tcp/iscsi hardware engine (which might be expensive and
difficult to make) or some kind of embedded cpu that runs a stripped
down linux (or something akin) kernel and is able to drive the ethernet
and the IDE controller. The overall architecture could be optimized to
provide an high-bandwidth data path between the ide controller and the
network interface. This way it could be possible to plug the card into
an oldish pc, attach an IDE (or SATA or what alse) HD and the network
cable to it and off we go. The main PC would have to do next to nothing
when the whole thing is used for remote access, but should be able to
see the drives and the nics as drives and network cards (d'oh!) so it
could be possible to run applications that need the data on the same
machine, using iSCSI on localhost.

This way you can just buy (or refurbish) a bunch of PCs, then if you
need processing power you can fit them with a NIC and access the remote
storage, if you need storage you can fit them with the 'san card' and if
you need both (but you want it able to scale in the future, both in
processing power and in disk size) you don't need to buy separate boxes
from the beginning.

This kind of product is obviously not suited to high-end usage, but I
think it would work well in a SOHO environment. Or at least I would find
it useful at home :-) I'm thinking about professionals and small
businesses that need some kind of centralized, organized storage but do
not have the resources necessary to really go pro.

Any idea/comments about this? Would it be feasible to implement it?

Cheers,
Pierluigi Rolando


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