docs/72897: ERRATA and RELNOTES are missing warnings about sil0680 arrays

[Harald Schmalzbauer]

>Number:         72897
>Category:       docs
>Synopsis:       ERRATA and RELNOTES are missing warnings about sil0680 arrays
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-doc
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          doc-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Oct 19 20:40:19 GMT 2004
>Closed-Date:
>Last-Modified:
>Originator:     Harald Schmalzbauer
>Release:        FreeBSD 5.3-RC1 i386
>Organization:
>Environment:
System: FreeBSD test2.flintsbach.schmalzbauer.de 5.3-RC1 FreeBSD 5.3-RC1 #0: Sun Oct 17 01:25:37 UTC 2004 root at wv1u.samsco.home:/usr/obj/usr/src/sys/GENERIC i386


	
>Description:
	Since Soren's LSI commiti (on 07/25, rev 1.79), metadata detection
	and evaluation on many sil0680 and cmd649 based RAID controllers
	is broken, so one cannot upgrade from FreeBSD 5.2.1 to FreeBSD 5.3
	without loosing data and RAID support.
	
>How-To-Repeat:
	Take a sil0680 based 5.2.1 system, installed on ar0 and build world
	and kernel with sources before 7/25 and after 7/25. Everything will
	be fine with kernel before 7/25 and you'll loose ar0 with the code
	after 7/25.
>Fix:
	According to Soren there's metadata-code redesign needed but he has
	no idea yet and no time to do that, so remove cmd649 and sil0680
	support from at least "ataraid", but that's too late I think.
	Urgently there must be some notice about the possibillity of
	data loss when upgrading from 5.2.1 to 5.3, and of course of the
	loss of RAID functionality.
	


>Release-Note:
>Audit-Trail:
>Unformatted: