启动solaris后出现以下问题，急!!!

mouse_2004

Boot device: disk  File and args:                                    
SunOS Release 5.9 Version Generic_118558-04 64-bit
Copyright 1983-2003 Sun Microsystems, Inc.  All rights reserved.
Use is subject to license terms.
Cannot assemble drivers for root /pci@1d,700000/scsi@4/disk@0,0:a
Cannot mount root on /pci@1d,700000/scsi@4/disk@0,0:a fstype ufs

panic[cpu0]/thread=140a000: vfs_mountroot: cannot mount root

0000000001409970 genunix:vfs_mountroot+70 (0, 0, 0, 200, 14581b0, 0)
  %l0-3: 000000000144bc00 000000000144bc00 0000000000002000 0000000001495768
  %l4-7: 000000000149b400 0000000001411e68 000000000144c400 000000000144f400
0000000001409a20 genunix:main+90 (1409ba0, f005a0ec, 1409ec0, 3527b8, 2000, 500)
  %l0-3: 0000000000000001 000000000140a000 0000000001412fd8 0000000000000000
  %l4-7: 0000000078002000 0000000000354000 00000000014a3be8 0000000001066878

skipping system dump - no dump device configured
rebooting...