check disk

How I do to check disk not use in my server.
Sun Solaris 2.8
df -k
du |sort -rn

But I want check disk and analyse a file system not used.

Thanks for reply.

do you mean checking a remote machines disks?
if so then you can use soltice or smc.

do you mean check a disk on your localhost and fsck?
then umount the fs and you cna use the fsck utility.

if you dont know which disk is installed you can use the format utility.