problem moving gmirror between two machines.

George Hartzell hartzell at alerce.com
Sun Nov 16 18:29:53 PST 2008


George Hartzell writes:
 > 
 > I have an HP DL360 with a pair of 1TB seagate disks that's been
 > running -STABLE with a ZFS root partition set up using the tools
 > available here:
 > 
 >   http://yds.coolrat.org/zfsboot.shtml
 > 
 > It's been working great.  As part of trying to understand what's going
 > on, I csup'ed to -RELENG earlier today and rebuilt/installed the
 > kernel and world whilst running on the DL360, so everything should be
 > current.
 > 
 > I tried to move the disks into an HP DL320 G4 and it fails to boot
 > because it can't find /dev/mirror/boot (which it wants to mount onto
 > /strap and then parts get nullfs'ed onto /boot and /rescue).  It gives
 > me the opportunity to start a shell, and from that shell I can do a
 > zfs mount -a and get all of the zfs filesystems mounted, but there's
 > nothing in /dev/mirror.  No gmirror status and list are silent.
 > 
 > I can move the disks back into the older machine and they work fine.
 > 
 > I've run fdisk -s ad4 and bsdlabel -A /dev/ad4s1a and diffed the
 > output from the two machines and they're identical.
 > 
 > I've booted with kern.geom.mirror.debug=2 and the DL320G4 tastes
 > /dev/ad4s1a (along with everything else) but doesn't do anything with
 > it.
 > 
 > Any ideas?
 > 

[for the archives]

Solved.  gmirror had been set up with -h specifying the device, and
although the newer server used the same device names for its disks
(ad[46]) it assigned them to different hot swap bays.  Once I switched
the disks everything came up fine.

g.


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