attaching lots of disks to PowerEdge 860?

[Amos Shapira]

Hello,

We have a few PowerEdge 860's which I mostly converted from our
previous-generation Windows based system to Xen hosts for development
on top of CentOS 5 (the production system is now mostly hosted
abroad).

These servers have space for only two internal disks and I'd like to
try to convert a couple of them into servers of shared storage.
I'm thinking of just setting them up to sync their disks using DRBD
and providing access to the rest of the network via iSCSI.

I'm looking for a way to attach lots of disks to them. So far the only
options I found are MD1000/3000 from Dell, which are a bit too
expensive for such a side-project.

Is there another economical (and sane, speed-wise) way to get lots of
disks on these system's bus?

Thanks,

--Amos