Disk writes often

Question

Hello I Have the following hardware configuration 2 hard drives:
/dev/hda with
/dev/hda1 mounted as /
/dev/hda2 mounted as /tmp
/dev/hda3                      /home
and /dev/hdb
/dev/hdb2 swap
kernel version is 2.6.18.
The following problem appear, data  are written to often mostly on hda1 hda2, but not on hdb2 on swap partition.
Syslog is stopped and PU usage is low, under 3-5%. Any other server process is stopped (cupsys,ftp,sshd).
Only processes that are running, are typically for a desktop.
I try different setting on parameters from /proc/sys/vm/ but nothing has changed.
iostat still show disk writes on hda1 hda2 and rarely on hda3 periodically at 1-2min. interval.
Mount parameters noatime, commit=43200 do not show any change.
/dev/hda1 on / type ext3 (rw,noatime,commit=43200) [/]
/dev/hda2 on /tmp type ext3 (rw,noatime,commit=43200)
/dev/hda3 on /home type ext3 (rw,noatime,commit=43200)
dmesg shows something like that :
kjournald(2412): WRITE block 207120 on hda3
kjournald(2412): WRITE block 207128 on hda3
kjournald(2412): WRITE block 207136 on hda3
pdflush(185): WRITE block 0 on hda3
pdflush(185): WRITE block 8 on hda3
pdflush(185): WRITE block 11272256 on hda3
pdflush(185): WRITE block 11272872 on hda3
pdflush(185): WRITE block 11534336 on hda3
pdflush(185): WRITE block 11620200 on hda3
Any idea about what cause repeated disk writes or how to change that ?

Answer 1

Any suggestion ?