/nbsnas getting full

I have Celerra NS704 running 5.5.21-4.

I cannot use several commands, I guess because of /nbsnas partition getting full

[root@xxxx var]# df

Filesystem 1k-blocks      Used Available Use% Mounted on

/dev/hda3 2063536   1648348    310364  85% /

/dev/hda1 31079      2749     26726 10% /boot

none 257540         0 257540   0% /dev/shm

/dev/nde1 1818352   1818352         0 100% /nbsnas

/dev/hda5 2063504   1625120    333564  83% /nas

/dev/nda1 136368     60780     75588  45% /nas/dos

/dev/ndf1 1818352    833324    892656  49% /nas/var

[nasadmin@XXX nasadmin]$ server_export server_2
server_2 :
Error 2237: server_2 : Execution failed: No space left on device: Routine failure. [FILE.file_close]

nas_cmd: PANIC: caught signal #11 (Segmentation violation) -- Giving up...

After running /nas/sbin/js_cleandb, issue seemed to be resolved as I was able to run the command. But after few minutes partition was full again. I also checked /nbsnas/var/dump but it is empty.

What else can I delete?