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MEGA-CAPACITY 2.5" HDDs: WD10TPVT, SAMSUNG HM640JJ
and HM100UI
 
The trend in 2.5" drives
these days is thinner and faster SSDs. we have
no problem with that at all, but the high cost of
SSDs make them not so desirable for storing gigs of
movies, photos, and other space-hogging files.
So what's the solution? Get the fastest SSD as
your boot drive, then add one of these behemoths we
will be talking about there either as an
external HDD, or as a
secondary internal HDD:
Your laptop's current
optical drive can be put in an external USB
enclosure. After all, HDDs exceed 100MB/s and
will take advantage of the native interface more
than the optical drive will. Optical drives
would barely touch USB 2.0's maximum usable
bandwidth.
Getting back to the mega
2.5" drives, we have our first model, the Samsung
HM640JJ:
|
Drive Configurations
|
Capacity * |
500 GB |
|
Interface |
SATA 3.0Gbps |
|
Buffer DRAM Size |
16 MB |
|
Rotational Speed |
7,200 RPM |
Performance Specifications
|
Average Seek time(typical) |
11 ms |
|
Data Transfer Rate / Media
to/from Buffer(Max.) |
189 MB/s |
|
Data Transfer Rate / Buffer
to/from Host(Max.) |
300 MB/s |
|
Drive Ready Time(typical) |
4 sec |
Reliability Specifications
|
Non-recoverable Read Error |
1 sector in 1014 bits |
Acoustics
|
Idle |
2.6 Bel |
|
Performance Seek |
2.8 Bel |
Environmental Specifications
|
Temperature / Operating |
5 ~ 55 ℃ |
|
Temperature / Non-operating |
-40 ~ 70 ℃ |
|
Humidity(non-condensing) /
Operating |
5-90 % |
|
Humidity(non-condensing) /
Non-operating |
5-95 % |
|
Liner Shock(1/2 sine pulse)
/ Operating |
325 G |
|
Liner Shock(1/2 sine pulse)
/ Non-operating |
900 G |
|
Vibration / Operating |
1.5G |
|
Altitude(relative to sea
level) / Operating |
-300 to 3000 m |
|
Altitude(relative to sea
level) / Non-operating |
-400 to 15000 m |
Power Requirements
|
Voltage |
+5V±5% |
|
Spin-up Current (Max.) |
1000 mA |
|
Seek (typical) |
2 W |
|
Read/Write (typical) |
2.5 W |
|
Idle (typical) |
0.85 W |
|
Standby (typical) |
0.2 W |
|
Sleep (typical) |
0.2 W |
Physical Dimension
|
Height (Max.) |
9.5 mm |
|
Width |
69.85 mm |
|
Length |
100.3 mm |
|
Weight (avg.) |
119 g |
|
Here are its test results:
Next is its big brother, the
HM100UI, a 1TB monster!
|
Drive Configurations
|
Capacity * |
1TB |
|
Interface |
SATA 3.0Gbps |
|
Buffer DRAM Size |
8 MB |
|
Rotational Speed |
5,400 RPM Class |
Performance Specifications
|
Average Seek time(typical) |
12 ms |
|
Data Transfer Rate / Media
to/from Buffer(Max.) |
1081Mb/s |
|
Data Transfer Rate / Buffer
to/from Host(Max.) |
300MB/s |
|
Drive Ready Time(typical) |
5 sec |
Reliability Specifications
|
Non-recoverable Read Error |
1 sector in 1014 bits |
Acoustics
|
Idle |
2.4 Bel |
|
Performance Seek |
2.6 Bel |
Environmental Specifications
|
Temperature / Operating |
5 ~ 55 ℃ |
|
Temperature / Non-operating |
-40 ~ 70 ℃ |
|
Humidity(non-condensing) /
Operating |
5 ~ 90 % |
|
Humidity(non-condensing) /
Non-operating |
5 ~ 95 % |
|
Liner Shock(1/2 sine pulse)
/ Operating |
325 G |
|
Liner Shock(1/2 sine pulse)
/ Non-operating |
800 G |
|
Vibration / Operating |
1.5 Grms |
|
Altitude(relative to sea
level) / Operating |
-300 to 3,000 m |
|
Altitude(relative to sea
level) / Non-operating |
-400 to 15,000 m |
Power Requirements
|
Voltage |
+5V±5% |
|
Spin-up Current (Max.) |
1100 mA |
|
Seek (typical) |
2.0 W |
|
Read/Write (typical) |
2.4 W |
|
Idle (typical) |
0.7 W |
|
Standby (typical) |
0.2 W |
|
Sleep (typical) |
0.2 W |
Physical Dimension
|
Height (Max.) |
12.5 mm |
|
Width |
69.85 mm |
|
Length |
100.3 mm |
|
Weight (avg.) |
150 g |
|
Here are its test results:
Not as fast as the HM640JJ...
Lastly, we have Western
Digital's WD10TPVT:
|
Performance Specifications |
 |
 |
Rotational
Speed |
5,200 RPM
(nominal) |
|
|
Buffer
Size |
8 MB |
|
|
Average
Latency |
5.50 ms
(nominal) |
|
|
|
Seek
Times |
|
|
Read Seek
Time |
12.0 ms |
|
|
Track-To-Track Seek Time |
2.0 ms
(average) |
|
|
|
Transfer Rates |
|
|
Buffer To
Host (Serial ATA) |
3 Gb/s
(Max) |
|
|
|
Physical Specifications |
|
|
|
Formatted
Capacity |
1,000,204
MB |
|
|
Capacity |
1 TB |
|
|
Interface |
SATA 3 Gb/s |
|
|
User
Sectors Per Drive |
1,953,525,168 |
|
|
|
Physical Dimensions |
|
|
English |
|
|
Height |
0.49
Inches |
|
|
Depth |
3.94
Inches |
|
|
Width |
2.75
Inches |
|
|
Weight |
0.26
Pounds |
|
|
|
Metric |
|
|
Height |
12.5 mm |
|
|
Depth |
100.2 mm |
|
|
Width |
69.85 mm |
|
|
Weight |
0.117 kg |
|
|
|
Environmental Specifications |
|
|
Acoustics |
|
|
Idle Mode |
24 dBA
(average) |
|
|
Seek Mode
0 |
26 dBA
(average) |
|
|
|
Temperature (English) |
|
|
Operating |
32° F to
140° F |
|
|
Non-operating |
-40° F to
149° F |
|
|
|
Temperature (Metric) |
|
|
Operating |
-0° C to
60° C |
|
|
Non-operating |
-40° C to
65° C |
|
|
|
Humidity |
|
|
Operating |
8% to 95%
Non-condensing |
|
|
Non-operating |
5-95% RH
non-condensing |
|
|
|
Altitude (English) |
|
|
Operating |
-1,000
feet to 10,000 feet |
|
|
Non-operating |
-1,000
feet to 40,000 feet |
|
|
|
Altitude (Metric) |
|
|
Operating |
-305M to
3,050M |
|
|
Non-operating |
-305M to
12,200M |
|
|
|
Vibration |
|
|
Operating |
0.00459
g²/Hz (10 to 500 Hz) |
|
|
Non-operating |
0.05102
g²/Hz (10 to 500 Hz) |
|
|
|
Electrical Specifications |
|
|
Current
Requirements |
|
|
5 VDC |
|
|
Read/Write |
500 mA |
|
|
Idle |
400 mA |
|
|
Standby |
50 mA |
|
|
Sleep |
20 mA |
|
|
|
|
Power
Dissipation |
|
|
Read/Write |
2.50 Watts |
|
|
Idle |
0.85 Watts |
|
|
Standby |
0.25 Watts |
|
|
Sleep |
0.10 Watts |
|
And here are the WD's test
results:
All drives have a 3-year
warranty, but it looks like the WD needs the
most help in the performance department.
Nevertheless, I would still purchase the WD
because of its super-easy RMA process compared
to Samsung's nearly impossible procedures.
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