Re: anyway to log ext4 disk access ?

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On 13 March 2012 01:47, Ian Chapman <packages@xxxxxxxxxxxxxxxxxx> wrote:
On 03/12/2012 10:28 PM, Aaron Gray wrote:


I seem to be experiencing constant disk accesses on a new install on F16
and am wondering why and what they are basically.

Aaron

It might be tracker which is part of gnome. It likes to hammer the file systems with impunity but using a tool such as iotop will probably be your best bet.

Okay iotop showed ext4's jdb2 to be the process accessing the disk periodically. btrace did not reveal anything obvious.

Found this bug report which seems to be with lots of different distros, so its a Linux problem rather than a problem with Fedora :-

    https://bugs.launchpad.net/ubuntu/+source/linux/+bug/607560

I have two HP DL140 G3 machines, and multiple swappable drives, two lots of F14 SATA mirrored drives, one pair with the problem one without, and an F16 pair which also exhibit the problem. The F14 pair without the problem were installed sometime before the second lot with the problem.

The kernel versions of the two F14 pairs are the same.

I have tried removing all the RPM's from the newer pair exhibiting the problem but this does not seem to have solved the problem.

I have not tried systemtap yet, should I try this, it seems a bit low level and I am not sure on how to use it without quite a lot of looking into things ?

Many thanks in advance,

Aaron

 
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