dumpon on a gmirror system

[Walter Hop]

Hello all,

I hope this is the right mailinglist.

One  of  our machines running gmirror has become unstable and seems to
panic  at  times.  I  would  like to enable crash dumps which requires
dumping  to  a  swap  partition. My problem is: all the partitions are
gmirror-ed,  and  gmirror partitions can't be used with dumpon because
GEOM is already down at the time of dumping.

Someone  on  a mailinglist had suggested to dump to one of the gmirror
components  directly  (/dev/ad4s1b  in  my case). This would bring the
disks  out  of sync, although it wouldn't be critical if dumping works
exactly  as planned. Nevertheless, it would be devastating if I'd ruin
the mirror set. Is this practice recommended?

I  also don't seem to have an entry for ad4s1b in /dev, is there a way
to get around this?

How  do  people using gmirror exclusively handle the problem of saving
crash dumps?

Any help would be appreciated!

Kind regards,
Walter Hop
Transip BV

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