Subject: kern/8933: RAIDframe swap partitions cause unclean raid devices
To: None <>
From: None <>
List: netbsd-bugs
Date: 12/01/1999 12:09:39
>Number:         8933
>Category:       kern
>Synopsis:       RAIDframe swap partitions cause unclean raid devices
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people (Kernel Bug People)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Dec  1 12:09:00 1999
>Originator:     Rene Hexel
>Release:        1.4.1+
System: NetBSD idle 1.4P NetBSD 1.4P (IDLE) #41: Tue Nov 30 14:13:57 CET 1999 rh@idle:/usr/local/sys/NetBSD-current/src/sys/arch/i386/compile/IDLE i386

	Trying to add and use a swap partition on a RAIDframe device causes
the device to stay busy forever.  Thus, all attempts to 'raidctl -u' from
userland, but also any automatic raid unconfiguration upon system shutdown
fail.  For that reason, the raid device will remain unclean (requiring a
complete parity-rewrite for raid levels with parity).

	Partition your raid device 'raid0' to contain a swap partition
'raid0b' and add the following to your /etc/fstab:
	/dev/raid0b none swap sw 0 0

	After multi-user boot, watch any attempts of 'raidctl -u raid0' to
fail.  Notice that a reboot will also fail to unconfigure the device
(causing the next 'raidctl -c raid0' to complain about lots of unclean

	In the kernel, provide a way of unmounting a swap partition that
can be used by RAIDframe to cleanly unconfigure upon shutdown.