logical logs full

Hi, I have informix7.3 on a test machine, and we don't archive data to tapes etc. Here is my config. file info: # Physical Log Configuration PHYSDBS rootdbs # Location (dbspace) of physical log PHYSFILE 1000 # Physical log file size (Kbytes)# Logical Log Configuration LOGFILES 6 # Number of logical log files LOGSIZE 500 # Logical log size (Kbytes)# Log Archive Tape Device LTAPEDEV /dev/null # Log tape device path LTAPEBLK 16 # Log tape block size (Kbytes) LTAPESIZE 10240 # Max amount of data to put on log tape (Kbytes) PHYSBUFF 32 # Physical log buffer size (Kbytes) LOGBUFF 32 # Logical log buffer size (Kbytes)LOGSMAX 6 # Maximum number of logical log files LBU_PRESERVE 0 # Preserve last log for log backup Here is onstat -l output(partial): address number flags uniqid begin size used %used a039378 1 U-B---- 13 100233 250 250 100.00 a039394 2 U-B---- 14 10032d 250 250 100.00 a0393b0 3 U-B---- 15 100427 250 250 100.00 a0393cc 4 U-B---- 16 100521 250 250 100.00 a0393e8 5 U-B---- 17 10061b 250 250 100.00 a039404 6 U---C-L 18 100715 250 158 63.20 I need to cleanup these logs (they show as 100%). I ran ontape -s but it didn't cleanup these logs. When I run 'ontape -a' or 'ontape -l', it says: Logbackup failed - Log backup to device '/dev/null' not allowed Questions: 1. Should I be worried, or is it ok ? 2. Is it that last one (now at 63%) fills up , will they all be reset to 0% ? 3. How do I cleanup these logic. logs. ? 4. How automatically setup so they get cleaned up themselves ? Please copy me in your reply. Thanks for info. AH