>Number:         9816
>Category:       kern
>Synopsis:       Unknown debug string "ïïïïïïïï..."
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Apr 07 07:18:00 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     Manuel Bouyer
>Release:        current a few days old
>Organization:
LIP6
>Environment:

System: NetBSD ds20 1.4X NetBSD 1.4X (DS20) #4: Fri Apr 7 09:54:10 MEST 2000 bouyer@ds20:/home/src/sys/arch/alpha/compile/DS20 alpha


>Description:

	This machine (alpha DS20) has a raid-1 configured as its root device:
RAIDFRAME: Configure (RAID Level 1): total number of sectors is 17754112 (8669 MB)
RAIDFRAME(RAID Level 1): Using 6 floating recon bufs with no head sep limit
root on raid0a dumps on raid0b
/dev/raid0a    127759    28397    92974    23%    /
/dev/raid0d    992367   158117   784631    16%    /usr
/dev/raid0e   6887740   987923  5555430    15%    /home
and /dev/raid0b as swap device.
Under some conditions, after a reboot the status of the raid seems to be
corrupted: the kernel prints tons of:
Unknown debug string "ïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïïï"
(which takes several minutes on a 9600bps serial console :(
and the parity is marked dirty, although the machine was cleanly rebooted,
and it succeeded in unmounting its filesystems (just to be sure I
first downgraded single user (kill 1), umounted all but root filesystem,
remounted root R/O and turned off swap before rebooting).
This doesn't happen at each reboot.

>How-To-Repeat:
	use root on raid1 on 2 9G SCSI disks in a alpha (all this may be
	relevant or not, I'm not sure). reboot.
>Fix:
	Just waiting for the kernel to print all these 'Unknown debug string'
	is enouth, the machine will come up just fine after. But this is
	annoying and doesn't look very good.
>Release-Note:
>Audit-Trail:
>Unformatted: