[SunHELP] change disk position

Hello, I have a sparc UNIX solaris 2.6 with a single external 4Gb scsi hard
disk, this disk had a problem and I changed it with an internal 4G scsi hard
disk, all this after making the backup of all file systems into the tape,
after installing the new hard disk, I made the restore backup, now when i
start-up the server it sends the message 
"can't stat  /dev/rdsk/c0t3d0s0", 
this is because the /dev, /device and others file refer to the last disk
that was on target 3 (c0t3d0) and now the real target is (c0t0d0). What can
I do? do i have to change or add o delete some file?

thanks for your help
Mery