I want to prepare a backup machine (for disaster management) by passing only the ARCHIVEDIR directory from another online machine - both the machines have Postgresql installed. We have sent PGLOG and ARCHIVEDIR. Previously it was working,but now,when I am issuing pg_ctl start,it is giving error like this... postmaster starting postgres@carme:/usr/local/pgsql/data> LOG: database system was shut down at 2006-04-19 11:56:35 IST LOG: starting archive recovery LOG: restore_command = "cp /mnt/server/archivedir/%f %p" cp: cannot stat `/mnt/server/archivedir/00000001.history': No such file or directory LOG: restored log file "000000010000000000000000" from archive LOG: record with zero length at 0/A70B28 LOG: invalid primary checkpoint record LOG: restored log file "000000010000000000000000" from archive LOG: record with zero length at 0/A70AEC LOG: invalid secondary checkpoint record PANIC: could not locate a valid checkpoint record LOG: startup process (PID 7849) was terminated by signal 6 LOG: aborting startup due to startup process failure Actually I can't take full data backup,everyday.For this reason,I was using pg_xlog directory. Please help me,in this stage. Thanking you Jayati Biswas