A snapshot-related FFS panic and a Mylex RAID question

[Jan Srzednicki]

Hi,

I'm running FreeBSD 5.4-R with the official maintenance patches.

I've recently encountered the following issue while doing 'dump -L' of
an partition:

kernel: panic: snapacct_ufs2: bad block

That's pretty all I've got, because my Mylex controller doesn't want to
be a dump device:

[16:51] hostname:~ # dumpon -v /dev/mlxd0s1b
dumpon: ioctl(DIOCSKERNELDUMP): Operation not supported by device

Google is silent on that topic. So here are my questions:

1) Are there any chances the mentioned FFS problem has been fixed in 6.0
or the incoming 5.5-R? If yes, can I backport the fixes?

2) Can Mylex be somehow forced to accept the dump? What's the reason
it doesn't support it?

greetings,
-- 
Jan Srzednicki
w at expro.pl