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SSD is a storage product*
1
that uses semiconductor memory
(NAND flash memory)*
2
as a storage element. Since SSDs have
no mechanical moving parts, they are superior to HDDs in terms
of:
1) read performance, 2) resistance to shock and vibration and 3)
silent operation. Additionally, SSDs feature low power consumption
in standby mode.
An HDD is a storage product that magnetically stores data in a
disk recording medium. Data is written to and read from a platter,
which rotates at high speeds, via a magnetic head that operates
very close to the disk surface. Compared to SSDs, increasing
storage capacities is easier for HDDs. Additionally, HDDs provide
higher cost performance (lower price per gigabyte) than SSDs.
*1 Toshiba collectively refers to products that can store data such as SSDs
and HDDs as "storage products".
*2 NAND flash memory is a nonvolatile semiconductor memory.
600
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100
0
40
35
30
25
20
15
10
5
0
[MiB/s max]
[s]
Case Temperature
Vibration
Shock
Acoustic Noise
(Op.): 0˚C to 70˚C
(Non-Op.): –40˚C to 85˚C
(Op.): 196 m/s
2
{20 G}
(Non-Op.): 196 m/s
2
{20 G}
(Op.): 14,700 m/s
2
{1,500 G}
(Non-Op.): 14,700 m/s
2
{1,500 G}
None
(Op.): 5˚C to 55˚C
(Non-Op.): –40˚C to 65˚C
(Op.): 9.8 m/s
2
{1.0 G}
(Non-Op.): 49 m/s
2
{5.0 G}
(Op.): 1,960 m/s
2
{200 G}
(Non-Op.): 8,820 m/s
2
{900 G}
23 dB
(Tested by Toshiba)
Client SSDs and HDDs Overview and Structure
SSD and HDD Characteristics
Data Transfer Rate (Sequential) OS Boot Time Bit Price (Price Per Gigabyte)
SSD HDD SSD HDD SSD HDD
SSD
(THNSNF128GBSS)
HDD
(MQ01ABD100)
SSD Solid State Drive
Client SSD
HDD Hard Disk Drive
Client HDD
Connector (Interface)
Has an HDD-compatible SATA
interface and an mSATA interface
suitable for small-form-factor
appliances.
Controller
The heart of an SSD that delivers
fast read/write performance,
prolonged write/erase cycle life
and enhanced reliability.
NAND Flash Memory
Data is stored in a NAND flash
memory array, which features
Toshiba's MLC NAND technology
to achieve low costs and
high storage capacities.
Connector (Interface)
Has the most commonly used
SATA port for system interfacing.
Spindle Motor
A key part for rotating a medium at
high rpm. The platters are spun at
speeds varying from 5,400 rpm in
HDDs for PC applications to
15,000 rpm in enterprise HDDs.
Medium
A storage medium that holds data.
2.5-inch HDDs can hold up to
500 GB of data per platter.
Magnetic Head
Data is read from and written to
a medium via the magnetic head.
SSDs
have higher
performance.
SSDs
deliver shorter
boot time.
The bit price of
HDDs is
less than 1/10th
that of SSDs.
Bit Price (Price Per Gigabyte)