kern.geom.part.check_integrity=0 not working. not able to boot

I'm resending this email as I got no response the first time.

After over 3 years of uptime, I decided to upgrade one of my SUN boxes =
to 9-stable. However the new kernel didn't boot because of geom =
integrity check issues. This I understand as I remember I had to use =
some weird tricks in the past to get the entire disks used in the first =
place.=20
Anyway, I felt lucky this was a known and documented problem, with a =
workaround:

http://www.freebsd.org/releases/9.0R/relnotes-detailed.html#AEN1277

However, the workaround doesn't seem to work :-(

Type '?' for a list of commands, 'help' for more detailed help.
OK set kern.geom.part.check_integrity=3D"0"
OK boot
jumping to kernel entry at 0xc0070000.
Copyright (c) 1992-2012 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
       The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 9.0-STABLE #5: Thu Jun 14 19:24:33 UTC 2012

<SNIP>

Timecounters tick every 1.000 msec
ada0 at ata2 bus 0 scbus0 target 0 lun 0
ada0: <MAXTOR STM3160215A 3.AAD> ATA-7 device
ada0: 66.700MB/s transfers (UDMA4, PIO 8192bytes)
ada0: 152627MB (312581808 512 byte sectors: 16H 63S/T 16383C)
ada0: Previously was known as ad0
ada1 at ata3 bus 0 scbus1 target 0 lun 0
ada1: <MAXTOR STM3160215A 3.AAD> ATA-7 device
ada1: 66.700MB/s transfers (UDMA4, PIO 8192bytes)
ada1: 152627MB (312581808 512 byte sectors: 16H 63S/T 16383C)
ada1: Previously was known as ad1
GEOM: ada0: adding VTOC8 information.
GEOM_PART: integrity check failed (ada0, VTOC8)

this is where it hangs, just like without setting =
kern.geom.part.check_integrity.

Is this a regression?

--
cheers,
Ruben de Groot

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