We have a cluster with four nodes, each running a postgres 7.4.8 database. Due to a large amount of pilot error and possibly hardware problems (still trying to get to the bottom of it all), two of the databases won't start, and I can't login to two others, with any registered user. Two of the nodes have logs that look like this: 2007-09-22 07:06:05 [3055] LOG: could not create IPv6 socket: Address family not supported by protocol 2007-09-22 07:06:05 [3060] LOG: database system shutdown was interrupted at 2007-09-22 06:56:27 PDT 2007-09-22 07:06:05 [3060] LOG: could not open file "/var/lib/pgsql/data/pg_xlog/0000000000000000" (log file 0, segment 0): No such file or directory 2007-09-22 07:06:05 [3060] LOG: invalid primary checkpoint record 2007-09-22 07:06:05 [3060] LOG: could not open file "/var/lib/pgsql/data/pg_xlog/0000000000000000" (log file 0, segment 0): No such file or directory 2007-09-22 07:06:05 [3060] LOG: invalid secondary checkpoint record 2007-09-22 07:06:05 [3060] PANIC: could not locate a valid checkpoint record 2007-09-22 07:06:05 [3055] LOG: startup process (PID 3060) was terminated by signal 6 2007-09-22 07:06:05 [3055] LOG: aborting startup due to startup process failure The other two look like this: LOG: database system was shut down at 2007-09-22 05:52:26 PDT LOG: checkpoint record is at 0/9B0B8C LOG: redo record is at 0/9B0B8C; undo record is at 0/0; shutdown TRUE LOG: next transaction ID: 536; next OID: 17142 LOG: database system is ready FATAL: IDENT authentication failed for user "xxx" FATAL: IDENT authentication failed for user "yyy" Can someone tell what is going wrong and how I can recover? Morris ---------------------------(end of broadcast)--------------------------- TIP 1: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to majordomo@xxxxxxxxxxxxxx so that your message can get through to the mailing list cleanly