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kern/41604: root-on-RAID set always dirty on startup

>Number:         41604
>Category:       kern
>Synopsis:       root-on-RAID set always dirty on startup
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jun 16 15:30:00 +0000 2009
>Originator:     Jukka Salmi
>Release:        NetBSD 5.99.12
System: NetBSD 5.99.12 NetBSD 5.99.12 (MORAY) #0: Mon May 25 
17:09:01 CEST 2009 
Architecture: i386
Machine: i386
Since upgrading from 5.99.11 to 5.99.12, the parity status of the RAID1 set
which contains the root file system (and /var and /usr) is always dirty on
system startup, even if the last shutdown was clean.  However, another RAID1
set (which is also auto-configured) in the same system is _not_ dirty on system
This regression seems to have been introduced with this change:
At least a kernel from sources just before that commit
(`cvs up -D 2009.') does not show the problem, while one from
sources just after it (`cvs up -D 2009.') does show it.
Run NetBSD 5.99.12 or later, configure the root file system to be on a RAID1
set (`raidctl -A root ...'), shut down the system, boot it and check parity
status of the RAID set in question.
Would be greatly appreciated...

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