On one of our two NOES 6.5 we have sometimes the following error message in
the Sys$log.err:

11.07.2006 8.22.59 : COMN-3.23-34
Severity = 5 Locus = 2 Class = 6
NSS-2.70-5005: Volume GERINE01/APPS user data write
(20204(zio.c[2187])) to block 2164612(file block 3025)(ZID 1147091) failed.

This happend about all two months once.

What to do? Curiously the second server never made this error: hardware
(disk) problem?

Many thanks for each input.