Same problem here.
Ubuntu 10.10 64 bit / 2.6.35-28-generic
Disk one, Seagate barracuda 500 gig - ext4 - sda3 on /
Disk two, Samsung spinpoint 500 gig - ext4 - sdb1 on /home
I tried booting into the recovery mode with the shell and networking.
After a few seconds nothing, no jdb2. No disk activity at all running iotop.
This is the only time jdb2 did not access the disks.
After this I followed these instructions and on my system it worked:
~~~~~~~~~~~~~
We can confirm that our ext4 partition is running a journal with: (where X is
the partition number, sda1,2,3,4 etc)
$sudo dumpe2fs /dev/sdaX | grep has_journal
Disabling journaling is rather easy, the only drag is that to make
structural changes to a filesystem, the filesystem cannot be mounted
with read/write privileges. So, run a live cd, open a terminal and
enter:
$sudo tune2fs -O ^has_journal /dev/sdaX
And it's done. Now when you boot, the change will be noted and the disk
will be checked for errors. When the system is finally up we can run
this again to confirm that in fact ext4 is running without a journal.
$sudo dumpe2fs /dev/sdaX | grep has_journal
should now return nothing.
With this quick fix, no more constant IO peaks.
~~~~~~~~~~~~~
The tune2fs man page has this entry about 'has_journal'.
-O [^]feature[,...]
Set or clear the indicated filesystem features (options) in the
filesystem. More than one filesystem feature can be cleared or set by
separating features with commas. Filesystem features prefixed with a
caret character ('^') will be cleared in the filesystem's superblock;
filesystem features without a prefix character or prefixed with a plus
character ('+') will be added to the filesystem.
The following filesystem features can be set or cleared using tune2fs:
has_journal
Use a journal to ensure filesystem consistency even across unclean shutdowns.
Setting the filesystem feature is equivalent to using the -j option.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/607560
Title:
jbd2 writing block every 5 - 10 seconds, preventing disk spin-down and
making noise
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
