Help /usr/openv/db/log/server.log says:

I. 03/10 06:20:53. Starting checkpoint of "BMRDB" (BMRDB.db) at Sun Mar 10 2013 06:20
I. 03/10 06:20:55. Finished checkpoint of "BMRDB" (BMRDB.db) at Sun Mar 10 2013 06:20
I. 03/10 06:30:36. Starting checkpoint of "NBDB" (NBDB.db) at Sun Mar 10 2013 06:30
I. 03/10 06:30:37. Finished checkpoint of "NBDB" (NBDB.db) at Sun Mar 10 2013 06:30
E. 03/10 06:34:32. Fatal error: disk full /usr/openv/db/data/NBDB.log
I. 03/10 06:34:32. Connection terminated abnormally
I. 03/10 06:34:32. Disconnected SharedMemory client's AppInfo: IP=10.199.9.86;HOST=ATPBACKUPSP01;OS=SunOS 5.10 Generic_120011-14 ;PID=0x507;THREAD=0x1;VERSIO
N=9.0.2.3854;API=ODBC;TIMEZONEADJUSTMENT=480
I. 03/10 06:34:57. Connection terminated abnormally
I. 03/10 06:34:57. Disconnected SharedMemory client's AppInfo: IP=10.199.9.86;HOST=ATPBACKUPSP01;OS=SunOS 5.10 Generic_120011-14 ;PID=0x504;THREAD=0x1;VERSIO
N=9.0.2.3854;API=ODBC;TIMEZONEADJUSTMENT=480
I. 03/10 06:35:02. Connection terminated abnormally
I. 03/10 06:35:02. Disconnected SharedMemory client's AppInfo: IP=10.199.9.86;HOST=ATPBACKUPSP01;OS=SunOS 5.10 Generic_120011-14

After making some space (df -h)

root@ATPBACKUPSP01 # df -h
Filesystem             size   used  avail capacity  Mounted on
/dev/dsk/c0t0d0s0       20G    15G   4.8G    76%    /
/devices                 0K     0K     0K     0%    /devices
ctfs                     0K     0K     0K     0%    /system/contract
proc                     0K     0K     0K     0%    /proc
mnttab                   0K     0K     0K     0%    /etc/mnttab
swap                    10G   1.5M    10G     1%    /etc/svc/volatile
objfs                    0K     0K     0K     0%    /system/object
/platform/sun4u-us3/lib/libc_psr/libc_psr_hwcap1.so.1
                        20G    15G   4.8G    76%    /platform/sun4u-us3/lib/libc_psr.so.1
/platform/sun4u-us3/lib/sparcv9/libc_psr/libc_psr_hwcap1.so.1
                        20G    15G   4.8G    76%    /platform/sun4u-us3/lib/sparcv9/libc_psr.so.1
fd                       0K     0K     0K     0%    /dev/fd
/dev/dsk/c0t0d0s3       15G   706M    14G     5%    /var
swap                    10G    32K    10G     1%    /tmp
swap                    10G    56K    10G     1%    /var/run
/dev/dsk/c0t0d0s4       15G    13G   1.9G    88%    /opt
/dev/dsk/c0t0d0s5      7.9G   4.4G   3.4G    57%    /export/home

Then, moving the NBDB.log to another folder and running /usr/openv/db/bin/dbeng9 -f NBDB

2 physical processor(s) detected.
Running on SunOS 5.10 Generic_120011-14
Authenticated Server licensed for use with Authenticated Applications only
8192K of memory used for caching
Minimum cache size: 8192K, maximum cache size: 262016K
Using a maximum page size of 4096 bytes
Starting database "NBDB" (/opt/openv/db/data/NBDB.db) at Mon Mar 11 2013 10:43
Database recovery in progress
    Last checkpoint at Sun Mar 10 2013 06:30
    Checkpoint log...
Opening dbspace 'EMM_DATA' in file '/usr/openv/db/data/EMM_DATA.db' for database 'NBDB'
Opening dbspace 'EMM_INDEX' in file '/usr/openv/db/data/EMM_INDEX.db' for database 'NBDB'
    Transaction log: /usr/openv/db/data/NBDB.log...
    Forcing recovery without transaction log
    Rollback log...
    Checkpointing...
Starting checkpoint of "NBDB" (NBDB.db) at Mon Mar 11 2013 10:43
Finished checkpoint of "NBDB" (NBDB.db) at Mon Mar 11 2013 10:43
Recovery complete
Database server stopped at Mon Mar 11 2013 10:43

/usr/openv/db/bin/nbdb_ping says

Database [NBDB] is not available.

I cannot re create the NBDB.log
 

I encounter this before and I only move NBDB.log to other location and recreate the NBDB.log and able to start NBDB and NBEMM.

Now Netbackup cannot run backup because of this. Any help would be greatly appreciated..