Keyboard Cables?

[Stewart]

Does anyone have any sources for UNIX-PC keyboard cables?
A while back, someone posted information giving a number 
of sources of longer cables, coiled/non-coiled, shielded, etc.,
but I can't seem to dig this up.

Also, does anyone have any experience with the 23Mb tape
backup unit?

And, finally, does anyone have any information regarding the
algorithm used by the 3B1 to backup?  I assume a complete
backup saves the entire hard disk which, considering that
so much of it is from the foundation disks and other UNIX
stuff already on the owner's floppies, is quite a waste!
And the "backup one user" selection doesn't tell me how many
floppies I'll need!  Just hope, and if I'm short, it starts
numbering them all over after barfing on, for instance, a
non-formatted disk!  I've just cpio'd from a user's node and
then split the file into floppy-sized chunks.  Has anyone
tried to change the "last-partial-backup" date to cause only any
files changed AFTER the initial software installation to
be saved for backing up?

Thanks!
				- Mark

				G. Mark Stewart
				ATT_BTL, Naperville, Ill. ix1g266
				ihlpq!gms (312)979-0914
				(please include phone for response)