When it comes to the hard drives inside our notebook computers
most of us want more capacity and faster speeds. Typically the
largest hard drive you find in a notebook computer is 200GB.
Toshiba today announced a new 2.5”, 5400rpm, 3Gbps SATA hard
drive aimed at the notebook computer market that has significantly
higher storage capacity today. The 320GB drive packs an areal density
of 254 Gbits per square inch into two platters holding 160GB of data
each.
Data is written to the dual platters via perpendicular magnetic
recording processes first seen on Seagate desktop hard drives.
Toshiba says the media transfer rate is 801 Mbps and the average seek
time is 12ms.
This performance is very close to that of the 200GB 7200rpm drive
Toshiba also announced today that has an average seek time of 12ms as
well, but a faster 895.9 Mbps media transfer time.
The 320GB drive belongs to Toshiba’s MKxx52GSX series of drives
and has 250GB, 160GB, 120GB, and 80GB stable mates. One of the things
that makes life so hard on notebook hard drives is the risk of shock
from drops and bumps. Your desktop drive may run it’s entire life
without being moved, where as a notebook tends to have miles put on
it quickly. Toshiba says the operating shock resistance of the 320GB
drive is 350G and the non-operating shock resistance is 900G, which
should make the drives very durable. All the new 5400rpm drives have
an 8MB cache.