My laptop disk is an Hitachi:
*-disk
description: ATA Disk
product: Hitachi HTS54121
vendor: Hitachi
physical id: 1
bus info: s...@1:0.0.0
logical name: /dev/sda
version: HPBO
serial: HP0D00BDG0NJBA
size: 93GiB (100GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 signature=d53d826f
I've read about some problems with Ubuntu and these disks:
http://ubuntuforums.org/showpost.php?p=3806198&postcount=16
I've added the following to sysctl.conf:
vm.dirty_ratio = 40
vm.dirty_background_ratio = 1
vm.dirty_writeback_centisecs = 30000
The disk is mounted with "relatime" option. I've also checked "noatim" options
with same behaviour.
The disk led is blinking all the time, it's really a pain, it consumes a
lot of CPU, the system goes slow and so on.
--
Too much "kjournald(XXX): WRITE block"
https://bugs.launchpad.net/bugs/384399
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