Seeking suggestions for a HD backup technique

[jeffr@bmerha2a.bnr.ca (Jeffrey Robertson)]

Hi:

After about a year of inactivity, I'm finally getting back into
using my IIgs.  Now that I have a job, I also have a bit of cash
to invest in it.  I need to find some way to backup my two hard
drives (40 Meg InnerDrive and 120 Meg External SCSI, driven by
Apple High Speed SCSI card.)

The IIgs doesn't have the greatest collection of backup software
-- at least, I don't know of much.  I'd love to have a tape drive
with software that supports incremental backups, but I've never
heard of any.  Also, most of the drives I see advertised are for
1 Gig, or something equally huge.  They're priced accordinly,
too.  I don't need that much storage -- my biggest partition
is < 60 Meg.

One idea I'd toyed with was buying another external SCSI, mounting
it in the same case as my other one.  It would be 200 Meg, and I'd
use it to "mirror" the other two drives.  No fancy backup software
required, and it ought to be fairly cheap, since lots of folks
seem to be upgrading their 200 Meg HD to 10 Gig or something.

Basically, I'm sick of floppies, but I don't want to sink a
fortune into a backup system.  Oh, one final point:  I'm
partial to techniques that may be recycled in other computer
systems.  I may get a surplus Unix workstation someday, and a
SCSI device could be connected to either system.

Pearls of wisdom may be posted or emailed!

Cheers,
-- 
-------------------------------------+----------------+-----------------
Jeffrey Robertson                    |  jeffr@bnr.ca  |      BNR, Ottawa
"I speak for myself, not BNR" - Me   +----------------+       (Meriline)
"Verbing weirds language" - Calvin                      OC-48 FiberWorld