target mode

[Derek VerLee]

Hello
I'm curious about what is and isn't possible using scsi target mode in 
FreeBSD, both in principle and given the current state of the 
architecture.  In particular I am curious if it is possible to use a 
scsi card in target mode, to "export" drives, such as a geom array, to 
be accessed by another computer over a physical scsi connect.  I believe 
this is what iscsi support aims at, however i'm interested in other scsi 
interfaces, such as parrellel or perhaps SAS.  Searching the archives 
and web somewhat, I have seen other people ask this a couple times but 
haven't found a definite answer.

This would be to perhaps re-purpose an older computer, or an inexpensive 
one, to act much like an external raid (but perhaps potentially more 
flexible).

Is is possible now?  If not, could it be done with some hacking and 
coding?   How crazy would you have to be to try?

_derek