[M] Toshiba MQ02ABF075 2.5'' Mobile Thin HDD Review
 

The MQ02ABF075 drive from Toshiba exhibits good performances for a 5400RPM drive and comes with two platters and four heads on a 7mm form factor. This drive is mostly meant for ultrabooks and high-end multimedia devices, which do not need very high read/write performances but more storage space at a low price, while conserving battery life.

http://www.madshrimps.be/articles/article/1000729/