Panics with md/gvinum/ufs

[Martin]

Hi,

I've done some strange(?) experiments and I managed to get
a panic of type "baddir" and just now another one that only
rebooted my system instantly without writing a vmcore.

I don't know if this is important. I could not find any
information on how gvinum detects failed hard disks.
That's why I tried something really simple.

Steps to reproduce:

1)
dd if=/dev/zero of=a bs=1024 count=256000
dd if=/dev/zero of=b bs=1024 count=256000
dd if=/dev/zero of=c bs=1024 count=256000

2)
mdconfig -a -t vnode -u 0 -f a
mdconfig -a -t vnode -u 1 -f b
mdconfig -a -t vnode -u 2 -f c

3)
gvinum create raid5.conf

with raid5.conf:
drive a device /dev/md0
drive b device /dev/md1
drive c device /dev/md2
volume raid5
         plex org raid5 491k
         sd length 0 drive a
         sd length 0 drive b
         sd length 0 drive c

4)
newfs -m 0 /dev/raid5

5)
mount /dev/gvinum/raid5 /mnt/
mkdir /mnt/aaa

6)
dd if=/dev/zero of=c bs=1024 count=256000

7)
cd /mnt/aaa
touch a

8)
Repeat the steps 6) and 7) if it does not
panic at this point.

--
Martin