Summary:OS complains with "no left space on device" while there are enough free space

Hi,

First thanks all responser on the hot issue,special thanks to Tony
Mills,who drive me toward the right direction,and Peter Jakobi(sorry I
can't list all your name here).

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Case Description
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V490+Solaris 9,On a 79GBytes file system "/usr/local", where there are
25GBytes free, system fails to create a 1GBytes file via mkfile:

# df -h /usr/local
Filesystem             size   used  avail capacity  Mounted on
/dev/dsk/c1t1d0s6       79G    53G    25G    69%    /usr/local

# cd /usr/local;mkfile 1g 1g
Could not set length of 1g: No space left on device
# ls -l 1g
-rw-------   1 root     other          0 Aug  1 14:42 1g

The file "1g" not be created with specified size,Suspect the inode may
exhaust,check it find there are enough free inode:
# df -o i /usr/local
Filesystem             iused   ifree  %iused  Mounted on
/dev/dsk/c1t1d0s6    6465258 34820118    16%   /usr/local


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Action Taken
*****************

Actions to be taken include:

- fsck the filesystem,no issue found
- Re-constructe the filesystem with smaller inode size:
 # newfs -i 2048 /dev/rdsk/c1t1d0s6

All above actions can't fix the issue.


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Solutions
*****************

By "fsck" or "fstyp" to found the UFS filesystem "/usr/local" is under
very heavy fragmentation (>32%) ,it caused the full blocks(8k)
exhausted(nbfree=0),So we can't create any file which size lager than
8K,although there are over 25GB free space.

The final solution is re-create the filesystem by:
# newfs -o space <ufs_filesystem_raw_device>

and then restore the data.

Thanks again.

Best Rgds,
Simon
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