vtbd0: hard error cmd=write 290-305
I would like to report the same problem. I'm using 10.0-RELEASE-p7 as a
host, and 9.3-RELEASE as a guest. VM is created using vmrc script, it
installed fine. But on attempt to create additional fs inside the vm,
newfs just silently fails without writing anything to disk. file -s on
a filesystem reports just 'data', instead of the usual "Unix Fast File
This issue is caused by the FreeBSD GEOM code tasting the zvol,
parsing partition/slice tables, and marking sections read-only.
There is a fix for this by mav@ in r264145 in CURRENT, and MFC'd to
10-STABLE in r265678 (May 8). The fix will be in 10.1.
The zfs man page lists the new zvol property and sysctls that can be
used to prevent GEOM testing.
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