[net.periphs] Booting Unix off Fujitsu Eagles

sls@allegra.UUCP (~p) (02/09/84)

We are running Unix 4.1 on 2 Vax-11/780s 
We are currently booting off of RP06s. We would like to get rid of the
RP06s and boot off of Eagles.  The field engineer who installed the
Eagles said that you can't boot off them, but I find this hard to believe.
Has anyone else done this?  If so, could you please send me information
on doing this?

		Sue Shaw
		ATT Bell Laboratories
		allegra!sls

thomas@utah-gr.UUCP (Spencer W. Thomas) (02/10/84)

There was a bug in pre-4.2 bootstraps for the Fuji.  (Other problem was
you had to throw out other drives to fit the fuji into 512 bytes.)  The
"driver" in the bootstrap program spins on drive ready to decide when a
transfer has completed.  However, the fuji is so fast that this comes up
well before the data has actually made it into memory.  You need to
change that code to spin on controller busy instead (and invert the
sense of the test).  We had the weird situation where it would boot
without the FPA, but not with!  Not having the FPA slowed the CPU down
enough that it was (usually) ok.

=Spencer