formatting an eagle on an 8600

Daniel Trinkle trinkle at PURDUE.EDU
Tue Jul 22 00:23:55 AEST 1986


Question 1: Does anyone know why formatting an eagle on a VAX 8600 takes so
	much longer than on VAX 780?

On the 780:
	SET CLOCK FAST
	MASSBUS Fujitsu 2351 eagle (404M)
		attached to an Emulex controller
	4.2BSD boot floppy format program
		using severe burnin pattern, 48 passes

	about 12 hours formatting time

On the 8600:
	SET CLOCK FREQUENCY HIGH
	MASSBUS Fujitsu 2351 eagle (404M)
		attached to an Emulex controller
	4.3BSD distribution tape format program (/sys/consolerl/format)
		using severe burnin pattern, 48 passes

	about 48 hours formatting time!

Question 2: Has anyone used a clock setting of 60Mhz for the clock
	setting on the 8600?

Someone from DEC told us that it would run "a lot better" at 60Mhz.  60Mhz
	was not one of the six crystal settings.  There were two unused
	settings (X4 and X6).  Also, why is the HIGH setting associated
	with the 53Mhz setting and not the 56Mhz setting?

Daniel Trinkle <trinkle at purdue.edu>
Computer Science Department
Purdue University
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