echo 1 > /proc/sys/vm/block_dump

tail -f /var/log/syslog

Резултат :)

Oct 28 16:02:49 beta kernel: [55628161.993810] kjournald(349): WRITE block 1983406184 on sda2
Oct 28 16:02:49 beta kernel: [55628161.993812] kjournald(349): WRITE block 2803287720 on sda2
Oct 28 16:02:49 beta kernel: [55628161.994474] rs:main Q:Reg(25405): WRITE block 429161088 on sda2
Oct 28 16:02:49 beta kernel: [55628161.994665] kjournald(349): WRITE block 1947309000 on sda2
Oct 28 16:02:51 beta kernel: [55628164.076174] flush-8:0(348): WRITE block 1997551216 on sda2
Oct 28 16:02:51 beta kernel: [55628164.076176] flush-8:0(348): WRITE block 1997551224 on sda2
Oct 28 16:02:51 beta kernel: [55628164.076178] flush-8:0(348): WRITE block 1997551232 on sda2
Oct 28 16:02:51 beta kernel: [55628164.076180] flush-8:0(348): WRITE block 1997551240 on sda2
Oct 28 16:02:51 beta kernel: [55628164.076183] flush-8:0(348): WRITE block 1997551248 on sda2
Oct 28 16:02:51 beta kernel: [55628164.076185] flush-8:0(348): WRITE block 1997551296 on sda2
Oct 28 16:02:51 beta kernel: [55628164.076188] flush-8:0(348): WRITE block 1997551328 on sda2
Oct 28 16:02:52 beta kernel: [55628164.624602] apache2(4498): dirtied inode 62352816 (other_vhosts_access.log) on sda2
Oct 28 16:03:14 beta kernel: [55628187.122972] pyzor(4521): dirtied inode 16826650 (snsqV8) on sda2
Oct 28 16:03:14 beta kernel: [55628187.123212] pyzor(4521): dirtied inode 16826650 (?) on sda2
Oct 28 16:03:14 beta kernel: [55628187.123933] pyzor(4521): dirtied inode 16826651 (?) on sda2
Oct 28 16:03:26 beta kernel: [55628198.518779] mysqld(26078): dirtied inode 63300606 (labdatastore.MYD) on sda2
Oct 28 16:03:26 beta kernel: [55628198.607859] mysqld(26078): dirtied inode 63300606 (labdatastore.MYD) on sda2
Oct 28 16:03:26 beta kernel: [55628198.607888] mysqld(26078): dirtied inode 63300605 (labdatastore.MYI) on sda2
Oct 28 16:03:26 beta kernel: [55628198.607891] mysqld(26078): dirtied inode 63300605 (labdatastore.MYI) on sda2

За да се спре дебуг-а

echo 0 > /proc/sys/vm/block_dump