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					            Seagate Momentus XT – Reviewers Guide
                                             May 2010




                         Seagate’s 2.5-inch Solid State Hybrid Drive



Introduction
Today’s high-performance SSDs for mobile computing cost several hundred dollars more than standard
laptop hard disk drives of the same capacity, with the price of a 250GB SSD outstripping even the cost of
some mainstream laptop PCs. Many organizations and consumers are unwilling or unable to pay the high
price for the greater speed and quiet operations of SSDs. Raising the barrier even higher, SSDs offer
fewer capacity options than hard disk drives and no advantage in extending the battery life of a laptop.

The new Seagate Momentus XT hard drive combines a 7200RPM spin speed, 4 GigaBytes of solid state
flash and Seagate’s Adaptive Memory – a groundbreaking Seagate technology that moves frequently
used information into flash memory for faster access. Momentus XT – a 2.5-inch, 9mm drive with a top
capacity of 500GB – boots up to 40 percent faster than traditional 7200RPM notebook drives and sets
new performance benchmarks for gaming, multi-media enhanced and high-end laptops and workstations
as well as high performance external backup enclosures.

The Seagate Adaptive Memory algorithm works by identifying patterns in how often certain digital data is
used. It then moves the most frequently retrieved information to flash memory for faster access than from
the spinning disks – effectively tailoring hard drive performance to the user and applications.
Momentus XT installs as easily as a traditional 9.5mm-high notebook drive for new systems or laptop
upgrades and, unlike early hybrid drives, operates independently of the operating system and the
motherboard chipset.


Key Features and Benefits
• Boots 40 percent faster than traditional 7200-RPM drives (for overall system performance, that's
within 1% of an SSD*)
• Cuts costs by 75 percent compared to SSDs by combining solid state and hard drive technologies
• Delivers the perfect balance of speed and capacity
• Uses Adaptive Memory technology to optimize performance in real time by storing frequently used
files and data on the solid state drive component
• Ensures compatibility with any operating system or application with a standard 9.5mm notebook
drive form factor and the characteristics of a traditional 7200RPM drive
• Offers all the benefits of SSD performance with the high capacity, storage, battery life, power
consumption and heat generation of a traditional hard drive

*Per Seagate benchmark data, using SysMark07 combined with 4GB of RAM on the system side



             Feature                                                    Benefit
500GB, 320GB, 250GB hard                Sweet spot capacity points that performance enthusiasts are looking
drive capacities                        for
                                        Ensures that you will have the capacity you need for any type of
                                        application or digital hobby—ample digital play room
4GB solid state flash                   Speeds bootup and application response time
7200RPM spin speed                      Performance that won't increase the noise, heat or power
                                        consumption of your hard drive—speed without the excess baggage.

Seagate Adaptive Memory                 Customizes system performance to the user. Usage patterns are
Technology                              constantly monitored and updated for dynamically improved response
                                        times.


Testing Momentus XT

Test this product using aggressive applications like:

Application                                                  Recommended Test
Windows Vista or Win7 while booting and loading              PCMark Vantage – HDD Suite
applications
General Drive Performance                                    PCMark Vantage – HDD Suite, SYSmark 07
                                                             Preview.
Game or Application loading                                  PCMark Vantage – HDD Suite, SYSmark 07
                                                             Preview.
Photoshop rendering                                          PCMark Vantage – HDD Suite, SYSmark 07
                                                             Preview.
AutoCAD software                                             PCMark Vantage – HDD Suite, SYSmark 07
                                                             Preview.
The Momentus XT Adaptive Memory technology relies on identification of usage patterns. Therefore, to
get an accurate representation of the performance it is important to repeat the benchmark at least three
times and look at the scores from the last run.

Many traditional HDD benchmarks, as oppose to those listed above, utilize low level HDD commands to
analyze ‘raw’ read/write performance of the drive under various conditions. These synthetic benchmarks,
however, are not a good measure of the actual performance benefit that an end-user will experience. This
is because the storage unit many times is not the bottleneck in real user experience. Long sustained
transfer rates do not impact the end user as much as short bursts of data transfer. How the performance
of the storage unit interacts with the host system is a complicated relationship that can only be
satisfactorily measured using scripting benchmarks that mimic end-user activity and take into account
system/storage interaction. If the additional ‘raw’ performance came without a cost then the real world
benefit is inconsequential. However, if the additional performance comes at a cost it is important to
demonstrate the actual value proposition to the user.

The following programs are examples of benchmarks designed for measuring ‘raw’ read/write
performance of a drive. While they represent a drive ‘raw’ comparison there is not a direct correlation to
user benefit. Thus, they are not a good measure of the value of that ‘raw’ performance.

       H2Bench
       HDTune
       IOMeter
       CrystalDiskMark
       PCMark 04, PCMark 05


Momentus XT MSRP

       500GB – $156
       320GB – $132
       250GB – $113


Seagate PR Contact

Mike Hall
Corporate Communications
Seagate Technology
(831) 439-2731
(408) 242-0562 (cell)
michael.hall@seagate.com


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