Recurring disk activity

[Mayuresh <mayuresh@acm.org>]

I am a new Debian user.

On a freshly purchased laptop I installed Debian jessie and I am facing a
constant recurring disk noise.

Have searched the forums on various lists and tried out suggested
solutions.

Following is the relevant information:

Laptop spec:
http://support.hp.com/us-en/product/HP-15-r200-Notebook-PC-series/7486447/model/7748035/document/c04576750/

# uname -a
Linux hp 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1 (2015-05-24) x86_64 GNU/Linux

# hdparm -I /dev/sda | grep level
        Advanced power management level: disabled

# iotop -obtqqq
15:56:43    89 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.13 % [kworker/1:1]
15:56:46    89 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.14 % [kworker/1:1]
15:56:48    89 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.14 % [kworker/1:1]
15:56:49    89 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.12 % [kworker/1:1]
15:56:51    89 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.12 % [kworker/1:1]
15:56:53    89 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.12 % [kworker/1:1]
15:56:55    89 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.13 % [kworker/1:1]

No file in /var/log is seen changing frequently.

There is no X installed, leave alone any desktop manager. It's a bare bone
installation which is merely started.

smart, hal : not installed

The laptop has a builtin freedos partition. If I boot to that there is no
disk noise. Thus it may not be a drive problem.


Would appreciate help in fixing the unnecessary disk 

Mayuresh