Booting from wrong SCSI-disk. Error -256 Stack Underflow

Hi.
I need to boot on Sun Blade 150 from scsi-disk, that ran on old Sun Ultra 10.
It is necessary to take some the information from an old disk and something to study.
The workstation is booted and I receive the following issue:

Sun Blade 150 (UltraSPARC-IIe 650MHz), No Keyboard (tip connection)
Copyright 2005 Sun Microsystems, Inc. All rights reserved.
OpenBoot 4.17.1, 512 MB memory installed, Serial #xxxxxxxx.
Ethernet address xxxxxxxx, Host ID:xxxxxxxx



Rebooting with command: boot newdisk
Boot device: /pci@1f,0/pci@5/scsi@2/disk@0,0:a File and args:
boot: cannot open kernel/unix
Enter filename [kernel/unix]:
boot: cannot open kernel/unix
Enter filename [kernel/unix]:
boot: cannot open kernel/unix
Enter filename [kernel/unix]: /platform/sun4u/sparcv9/unix/kernel
boot: cannot open /platform/sun4u/sparcv9/unix/kernel
Enter filename [kernel/unix]:
Enter default directory for modules [/platfo
rm/sun4u/kernel /kernel /usr/kernel]:
krtld: error during initial load/link phase
ERROR: Last Trap: Fast Data Access MMU Miss

Error -256
Evaluating:
Tried to access instance-specific data with no current instance
ERROR: Last Trap: Fast Instruction Access MMU Miss

Evaluating:
Error -256
Stack Underflow
ok