HANA log volume is full and the database does not respond or start anymore What to do?

1. Stop the database:
HDB stop
2. Change into the folder mnt00001 of the logvolume (Default: /usr/sap/<SID>/global/hdb/log):
cd /usr/sap/<SID>/global/hdb/log/mnt00001
3. You have to move one of the logvolumes temporarily to another volume where enough space is
available. You should free at least 2 GB of space to ensure that the database has enough space to
start. To find out the space consumption of each volume execute:
du -sh *
4. Move a volume which consumes at least 2 GB of space (e.g. hdb00003) to a volume with enough free
space, e.g. to the data volume (Default: /usr/sap/<SID>/global/hdb/data):
mv hdb00003 /usr/sap/<SID>/global/hdb/data
5. Create a symbolic link to the new folder in the old location:
ln -s /usr/sap/<SID>/global/hdb/data/hdb00003 /usr/sap/<SID>/global/hdb/log/mnt00001/hdb00003
6. Start the database (HDB start) and perform a backup
7. Use the following SQL-Statement to clean up the logvolume:
ALTER SYSTEM RECLAIM LOG;
8. Stop the database again and remove the symbolic link:
rm -f /usr/sap/<SID>/global/hdb/log/mnt00001/hdb00003
10. Move the log volume back to its original location:
mv /usr/sap/<SID>/global/hdb/data/hdb00003 /usr/sap/<SID>/global/hdb/log/mnt00001
11. Start the database (HDB start)