Old disks vs "new" Sun

	Since my U60 stopped recognizing its disks, I bought a v210 to replace 
it. Yes, it is bloody loud. Anyway, I slapped the two drives into the 
v210 and turned it on. This is what I saw:

Rebooting with command: boot
Boot device: disk  File and args:
SunOS Release 5.10 Version Generic_137137-09 64-bit
Copyright 1983-2008 Sun Microsystems, Inc.  All rights reserved.
Use is subject to license terms.
WARNING: pool 'boot' could not be loaded as it was last accessed by 
another sysY
NOTICE:
spa_import_rootpool: error 9

Cannot mount root on /pci@1c,600000/scsi@2/disk@0,0:a fstype zfs

panic[cpu1]/thread=180e000: vfs_mountroot: cannot mount root

000000000180b950 genunix:vfs_mountroot+358 (800, 200, 0, 1875c00, 
189f800, 18c9)
   %l0-3: 00000000010b9c00 00000000010b9ce0 000000000187bab8 
00000000011e6800
   %l4-7: 00000000011e6800 00000000018cc000 0000000000000600 
0000000000000200
000000000180ba10 genunix:main+a0 (1815180, 180c000, 1839750, 18c6800, 
181b580, )
   %l0-3: 0000000001015400 0000000000000001 0000000070002000 
0000000000000000
   %l4-7: 000000000183ec00 0000000000000001 000000000180c000 
0000000000000000

skipping system dump - no dump device configured
rebooting...
Probing system devices
Probing memory
Probing I/O buses

How to persuade it to load the boot pool?