[Xitami] garbage characters in access logs

[Marc Doigny]

At 19:36 26/01/03, you wrote:
>Translation. Could be a hardware problem.
Not necessarily. Could be a silent crash of part of the core operating 
system, a power glitch or a power outage... ...
Log files that are kept continuously open are more prone to this 
phenomenon, since there is never a CLOSE forcing a buffer flush (and 
synchronisation between actual data and FAT information).
It will also more likely occur on a FAT drive than on a NTFS drive (with 
it's backtracking ability)

Marc


>1/26/03 9:29:49 AM, marc <marc@verfaillie.com> wrote:
>
> >> I am running 8 virtual domains all with separate logs in CLFX format. The
> >> logs cycle monthly.
> >>
> >> I recently noticed zero access reported in my log analysis software for a
> >> period of about a week. However, I know the server was up for most of this
> >> period. I checked the raw access logs and they are all full of garbage
> >> characters for this period.
> >>
> >> Any idea what would be causing this problem with the logs?
> >Probably some disk access error, the garbage is the data in sectors that 
> the computer assumed were containing access log data, while in fact there 
> was nothing written at all.
> >The computer keeps track of the position of data files and read the 
> sectors that correspond to the file, but if some sectors were not 
> correctly written, the read operation yelds
>garbage (the original content of those sectors).


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