dmesg says "out of inodes"
root@server# dmesg
..
uid 0 on /: out of inodes
uid 0 on /: out of inodes
uid 0 on /: out of inodes
uid 0 on /: out of inodes
uid 0 on /: out of inodes
uid 0 on /: out of inodes
uid 0 on /: out of inodes
uid 0 on /: out of inodes
inodes are used for file entries. Each file/directory uses an inode.
When you run out of inodes, you can't create any more files, no matter
how much space you have left.
"df -i" will show inode usage.root@server# fstyp /dev/dsk/c0t0s0root@server# df -o i /
ufs
Filesystem iused ifree %iused Mounted on
/dev/dsk/c0t0s0 1258550 0 100% /
The only way to free up inodes is to delete some files/directories.
You must have a lot of files or directories somewhere to be using up
all your inodes when you have 50% of the disk left. Once you find
out where all the files are, you can delete some, or possible tar
them up so they only take up a single inode.
For more information: http://www.porcupine.org/forensics/forensic-discovery/chapter3.html