The first system provides a client-accessible NFS mount; the second system is used as an offsite mirror of the first, not directly accessible to clients.
On each system, we recently added a RAID volume and used it to increase the size of the logical volume. ‘df’ shows an abundance of space available for use:
# df -h /mnt/tmp/
Filesystem Size Used Avail Use% Mounted on
gverc:/GCC_archive 107T 29T 79T 27% /mnt/tmp
However, on the first system, we found that NFS clients were getting errors like this:
# mkdir /mnt/tmp/zzztestzzz
mkdir: cannot create directory `/mnt/tmp/zzztestzzz': No space left on device
I assume it’s an inode issue, because when you remove a number of file/directory objects, the same number of objects can subsequently be created successfully.