Date: Thu, 02 Mar 2006 19:08:40 +0100 From: Martin <nakal@nurfuerspam.de> To: stable@freebsd.org Subject: Panics with md/gvinum/ufs Message-ID: <440734A8.1010908@nurfuerspam.de>
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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
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