Infrastructure Software

Hi, one of my file systems is corrupted. When I do
#mountall --> I am getting the following
/dev/md/rdsk/d50 already mounted
checking ufs filesystems
/dev/rdsk/c1t0d0s6: No such device or address
Can't open /dev/rdsk/c1t0d0s6
/dev/rdsk/c1t0d0s6: CAN'T CHECK FILE SYSTEM.
/dev/rdsk/c1t0d0s6: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.

WARNING - Unable to repair one or more of the following filesystem(s):
/dev/rdsk/c1t0d0s6
Run fsck manually (fsck filesystem...).
Exit the shell when done to continue the boot process.
#

When I do the following to fix the file system
# fsck -F ufs -y /dev/rdsk/c1t0d0s6
I am getting the following error mesg.
Can't open /dev/rdsk/c1t0d0s6
How can I fix the problem. Any help is appreciated. Thanks.