On Sat, 26 Jun 2004, Pawel Jakub Dawidek wrote: > On Sat, Jun 26, 2004 at 02:07:03PM +0200, Lukas Ertl wrote: > +> This is a situation that I currently consider 'unsupported'. The problem > +> is that the 'd' partition has no offset, thus it is (from the point of > +> view of a geom_vinum drive geom) the same as the 'c' partition. This is > +> the first problem. The second problem is the on-disk format of a > +> bsdlabel. As far as I understand it, this meta-data is stored inside > +> the first partition, so when you open the drive for writing (i.e. > +> mount, fsck) you trigger a spoil event which cause all kinds of confusion > +> for geom_vinum. > > I don't know exactly what problems you got, but maybe it can help you: > To avoid spoiling and metadata changes under me, I'm opening every > provider, which I want to use in geom_mirror (r1w1e1), even if provider > which I create isn't yet opened. This was a good tip, but unfortunately it still doesn't work out. I always run into the 'spoiled but dcr = %d' KASSERT. Unfortunately, kernel debugging is currently rather a 'guessing' since kgdb doesn't work. The next problem is that you might specify /dev/da1s1a as vinum drive but get /dev/da1s1c or even /dev/da1s1. 'Classic vinum' looked at the type field in the disklabel, but we don't do this anymore. cheers, le -- Lukas Ertl http://homepage.univie.ac.at/l.ertl/ le_at_FreeBSD.org http://people.freebsd.org/~le/Received on Sat Jun 26 2004 - 13:46:20 UTC
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