[ale] two file system questions

[chris at perun.room17.com (Chris Farris)]

1) What is the term for having two hard disks mounted as one file
system?

2) Does Linux do this?

3) Is this an ok idea for an news server.

(so I can't count).

Thanks
Chris

-- 
"I guess this finally explains where all those glowing, six-armed blue
   guys came from." -Lawrence Santana, on Indian Nuclear Testing