misc/42889: installer nukes raid component label

[jakllsch%kollasch.net@localhost]

>Number:         42889
>Category:       misc
>Synopsis:       installer nukes raid component label
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    misc-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Feb 26 20:15:00 +0000 2010
>Originator:     Jonathan A. Kollasch
>Release:        NetBSD 5.99.24 2010-02-25
>Organization:
        
>Environment:
Architecture: x86_64
Machine: amd64
>Description:
booting -current amd64cd destroys a marked-for-root-autoconfig component label.

component label dumps follow,

before:
00004000  02 00 00 00 c8 82 ce 77  a3 03 00 00 00 00 00 00  |.......w........|
00004010  01 00 00 00 01 00 00 00  02 00 00 00 00 00 00 00  |................|
00004020  00 00 00 00 80 00 00 00  01 00 00 00 01 00 00 00  |................|
00004030  31 00 00 00 64 00 00 00  00 02 00 00 00 00 40 00  |1...d.........@.|
00004040  40 00 40 00 a3 03 00 00  03 00 00 00 40 9c 00 00  |@.@.........@...|
00004050  08 00 00 00 51 00 00 00  00 00 00 00 00 00 00 00  |....Q...........|
00004060  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
000040c0  00 00 00 00 00 00 00 00  01 00 00 00 01 00 00 00  |................|
000040d0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00004400  01 00 00 04 02 81 e0 1a  08 04 01 00 00 00 00 00  |................|
00004410  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00004600

after:
00004000  00 00 00 00 00 00 00 00  9c 03 00 00 00 00 00 00  |................|
00004010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00004040  00 00 00 00 9c 03 00 00  03 00 00 00 40 9c 00 00  |............@...|
00004050  08 00 00 00 00 10 00 00  00 00 00 00 00 00 00 00  |................|
00004060  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00004400  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
*
00004600

>How-To-Repeat:
take a raid volume marked with 'raidctl -A root' (RAID-1, the first component
of my pair is absent), boot -current amd64cd, reboot before doing anything
significant.  note how system won't autoconfig root partition after this.
>Fix:
unknown.