Superblock issue
Looking for a little guidance from the gurus.
Unable to get our V480 to boot. Booted single user from cdrom. When I run fsck on the root file system I get a bad superblock error and am not able to repair it.
So I try to find alternate superblocks and get the following error:
# newfs -Nv /dev/rdsk/c0t0d0s0
mkfs -F ufs -o N /dev/rdsk/c0t0d0s0 640 640 1 8192 1024 16 10 5 2048 t 0 -1 8 16 n
mkfs: bad value for size: 640 must be between 1024 and 640
mkfs: size reset to default 640
Warning: inode blocks/cyl group (42) >= data blocks (42) in last cylinder group. This implies 640 sector(s) cannot be allocated.
/dev/rdsk/c0t0d0s0: 0 sectors in 0 cylinders of 1 tracks, 640 sectors 0.0MB in 0 cyl groups (16 c/g, 5.00MB/g, 2432 i/g)
super-block backups (for fsck) at:
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I am a bit stumped. Been looking all over the web, man pages and anything else I can find.
Any ideas would be greatly appreciated.

