Stable Config for Prestoserve and SSA NVRAM I got this information from Doug Hughes : 
OS:			Solaris 2.4 HW 3/95
SSA driver patch:	102432-10
Firmware Rev:  		3.4
2-gig disks FW:		416
presto HW rev: 		-02
presto SW rev:		2.4.2 + 103043-02
Volume Manager:		2.1 + 102403-04, or 2.1.1

Misc needed:		103062-01, 101945-34, 102283-01, 101907-09

You will also need the following to fix a problem with SSA-NVRAM:

 103290-02 Solaris 2.4 (all versions)
 103017-04 Solaris 2.5

Note:  These may not be the latest patches. Use later revs
	if available.
According to Doug, each patch by itself gives about a 20-40% CPU reduction in IO/wait time spent (40-60% cumulative).
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