[Gllug] what is causing disk activity ?

[Daniel P. Berrange]

On Thu, Nov 20, 2008 at 04:38:57PM +0000, Alain Williams wrote:
> On Thu, Nov 20, 2008 at 04:29:51PM +0000, Martin A. Brooks wrote:
> > Alain Williams wrote:
> > >> You're using a journalling filesystem?
> > >>      
> > >
> > > Yes: ext3
> > 
> > There you go then.
> 
> But I'm not updating anything on disk .... so why the writes ?

Every read operation updates the access time on the file, which results in
a write for the file metadata....and also the journal...  Might like to 
try the noatime mount option 

http://tldp.org/LDP/solrhe/Securing-Optimizing-Linux-RH-Edition-v1.3/chap6sec73.html

Daniel
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