Run the following:
$ sudo smartctl -A /dev/sda | grep -P ‘Load_Cycle|ATTRIB’
And see something like this:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
193 Load_Cycle_Count 0x0032 100 100 000 Old_age Always – 6038
The last value is the number of load cycles. A laptop hard drive typically has a lifetime of 600,000 load cycles. If the count is increasing by several thousand per day (or even several hundred), it may be cause for concern.
For information and how to fix it, see [http://lwn.net/Articles/256769/](http://lwn.net/Articles/256769/)