[firebird-support] Page is of wrong type (expected 5, found 0)

[Martin Schwedhelm silo...@yahoo.com [firebird-support]]

Hi all,
I have multiple (8) databases where no connection is possible and gfix prints 
the above message.
Firebird version: 2.5.2Operating system: Windows 2003 - Windows 2008 
(VmWare)Size: Varying, ~100MB to ~14GB single fileODS: 11.1 / 11.2
It looks like the database file is truncated and when resized to the previous 
sizebecause all pages starting from a random page till the end of the file are 
filled with zeros.In one case only the first 9MB of a 7GB database survived.
Before the corruption all systems involved were restarted (windows-update, 
etc.).Could a unsave shut down of the database server explain the behaviour?
The odd thing is that in one case we replaced the database with a backup 
file.The backup was checked with gfix / gbak and OK.But after:- Shut down 
server process- Replace database- Start server process
The database was again corrupted. This was reproducable one more time, but not 
later and not on another system.That could mean hardware error (hard disk 
failure), but no events were recorded regarding that matter.Also, even if the 
database in question has a page size of 16384 on a 4096 file system, the 
corruption startsexactly at a page border which contradicts the hardware theory 
a little.
I don't know what else could be the source of the problem.
Any help will be appriciated.