again, invalid page header in block ...

Hi list,

I am working with 7.4.1 under Linux (SuSE 8.1) The server is a HP
ProLiant DL 380-G3, 2x Intel Pentium4-Xeon, 2.8 GHz, 4 GB memory and a
RAID 5 system with ca. 500 GB diskspace (xfs file system)

When doing big transactions or changes (UPDATE several million rows in
one step) on a database with ca. 50 GB diskspace and ca 15 million
entries, PostGIS and lots of indexes, I get errors like

ERROR: invalid page header in block 582024 of relation ...

The error does not occur regularly. It seems to me that the error is
related with heavy load and heavy I/O . CPU and memory does not seem the
problem, according to my hotsanic tools.

I have worked through

http://archives.postgresql.org/pgsql-general/2003-11/msg01288.php
http://archives.postgresql.org/pgsql-admin/2003-09/msg00423.php
http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&threadm=20030922162322.E12708%40quartz.newn.cam.ac.uk&rnum=8&prev=/groups%3Fq%3Dpg_filedump%26hl%3Den%26lr%3D%26ie%3DUTF-8%26selm%3D20030922162322.E12708%2540quartz.newn.cam.ac.uk%26rnum%3D8

which suggest to me that I have run into hardware trouble (disk?
memory?!) But I supposed that my server was not SO bad for this database
application...

How to fix that? (I mean - not to repair the tables or pages but to get
a stable one? ) Trying another sotrage hardware?!
--
-------------------------------------------------------------------------------
Dr.-Ing. Hubert Fröhlich
Bezirksfinanzdirektion München
Alexandrastr. 3, D-80538 München, GERMANY
Tel. :+49 (0)89 / 2190 - 2980
Fax :+49 (0)89 / 2190 - 2997
hubert dot froehlich at bvv dot bayern dot de