What the heck is a bus error?

[Lincoln Peters]

Well, I started up one of the netbooting workstations, and everything worked 
fine until it ran the initscripts.  I kept getting messages from various 
programs (e.g. mount) that would die with a "Bus error".  I have no idea 
what that means, and as a result, I have no idea how to correct it?

Can anyone tell me what "Bus error" means, and/or what could be causing 
these errors?  The entire client system was copied off of Isildur (my best 
standalone workstation), and except for /etc/fstab and /etc/raidtab, it is 
identical to the setup on Isildur, which works perfectly.

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