When replacing drives in Sun V880s with fiber channel, you must boot the system using
boot -r
For the new drive to be recognized properly. The Sun SCSI drives that are set up for FibreChannel have a World Wide Name associated with them. If you boot without the "-r", the system looks for the drive under the old WWN and doesn't find it. That makes the fsck fail.
The "-r" flag tells it to rebuild the low level device list during boot. It finds the replacement drive with the new WWN and associates it with the proper /dev/dsk device. The new drive will then mount up properly without additional intervention.
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