Please help

I've have a MAJOR crash an hour ago and postgresql doesn't start anymoe
(version 7.3.4).

Here's the error log:

Oct 30 17:16:20 server postgres[4135]: [1-2] This probably means that some data blocks are corrupted
Oct 30 17:16:20 server postgres[4135]: [1-3] and you will have to use the last backup for recovery.
Oct 30 17:16:20 server postgres[4135]: [2] LOG: checkpoint record is at 36/C27C14C0
Oct 30 17:16:20 server postgres[4135]: [3] LOG: redo record is at 36/C2782998; undo record is at 0/0; shutdown FALSE
Oct 30 17:16:20 server postgres[4135]: [4] LOG: next transaction id: 203794305; next oid: 32417798
Oct 30 17:16:20 server postgres[4135]: [5] LOG: database system was not properly shut down; automatic recovery in progress
Oct 30 17:16:20 server postgres[4135]: [6] LOG: redo starts at 36/C2782998
Oct 30 17:16:21 server postgres[4135]: [7] PANIC: Invalid page header in block 6157 of 29135442
Oct 30 17:16:21 server postgres[4132]: [1] LOG: startup process (pid 4135) was terminated by signal 6
Oct 30 17:16:21 server postgres[4132]: [2] LOG: aborting startup due to startup process failure

Is there anything I can do not to reload all backups?

Regards
--
Olivier PRENANT Tel: +33-5-61-50-97-00 (Work)
6, Chemin d'Harraud Turrou +33-5-61-50-97-01 (Fax)
31190 AUTERIVE +33-6-07-63-80-64 (GSM)
FRANCE Email: ohp(at)pyrenet(dot)fr
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