Transcend TS120GSSD25D-M Manual

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2.5” Solid State Drive
Transcend Information Inc.
Preliminary V1.0
1
Description
Transcend 2.5” SATA II solid state drive is a huge
capacity, high speed, and low power consumption
without moving parts which design for take the place
of traditional hard disk drive. It provides fast read and
write performance for high end system such as
server and storage system. Build in advance ECC
and global wear-leveling provide a durable solution is
perfect replacement storage device for Server
systems, Storage systems, PCs, Laptops and
gaming systems.
Placement
Features
•Fully SATA II 3.0Gbps compatible
•Non-volatile Flash Memory for outstanding data
retention
•Built-in DRAM cache buffer
•Built-in ECC (Error Correction Code) functionality and
wear-leveling algorithm ensures highly reliable of data
transfer
•Lower Power Consumption
•Shock resistance
Dimensions
Side Millimeters Inches
A 100.00 ±0.40 3.937 ±0.016
B 69.85 ±0.20 2.750 ±0.008
C 9.50 ±0.20 0.374 ±0.008

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2.5” Solid State Drive
Transcend Information Inc.
Preliminary V1.0
2
Specifications
Physical Specification
Form Factor 2.5-inch HDD
Storage Capacities 60GB and 120GB
Length 100.00 ±0.40
Width 69.85 ±0.20
Dimensions (mm)
Height 9.50 ±0.20
Input Voltage 5V ±5%
Weight 91g ±2g
Connector SATA 7+15 pins combo connector
Environmental Specifications
Operating Temperature 0 ℃to 70 ℃
Storage Temperature - 40 ℃to 85 ℃
Performance
Model P/N Sequential Read(Max.) Sequential Write(Max.)
TS60GSSD25D-M 210 MB/s 150 MB/s
TS120GSSD25D-M 230 MB/s 180 MB/s
Actual Capacity
Model P/N User Max. LBA Cylinder Head Sector
TS60GSSD25D-M 125,045,424 7,783 255 63
TS120GSSD25D-M 250,067,567 15,565 255 63
Power Requirements
Input Voltage 5V ±5% @25℃
Mode Max. (mA) Max. (W)
Write(peak) 395.6 1.98
Read(peak) 176.7 0.88
Power Consumption
(60GB) Idle(peak) 88.3 0.44
Write(peak) 534.9 2.67
Read(peak) 196.9 0.98
Power Consumption
(120GB) Idle(peak) 88.3 0.44

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2.5” Solid State Drive
Transcend Information Inc.
Preliminary V1.0
3
Reliability
Data Reliability Supports BCH ECC 8 ,12 or 16bits/sector
Data Retention 10 years
MTBF 1.5M hours
Endurance 60GB: 75.7 years @ 20GB write/day
120GB: 151.4 years @ 20GB write/day
Vibration
Operating 5.0G, 15 – 800Hz
Non-Operating 5.0G, 15 – 800Hz
* Note: Reference to the IEC 60068-2-6 Testing procedures; Operating-Sine wave, 5-800Hz/1 oct., 1.5mm, 3g, 0.5
hr./axis, total 1.5 hrs.
Shock
Operating 1500G, 0.5ms
Non-Operating 1500G, 0.5ms
* Note: Reference to the IEC 60068-2-27 Testing procedures; Operating-Half-sine wave, 1500g, 0.5ms, 3 times/dir., total
18 times.
Regulations
Compliance CE, FCC and BSMI

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2.5” Solid State Drive
Transcend Information Inc.
Preliminary V1.0
4
Package Dimensions
Below figure illustrates the Transcend 2.5” SATA Solid State Drive. All dimensions are in mm.

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2.5” Solid State Drive
Transcend Information Inc.
Preliminary V1.0
5
Pin Assignments
Pin No. Pin Name Pin No. Pin Name
01 GND 02 A+
03 A- 04 GND
05 B- 06 B+
07 GND 08 NC
09 NC 10 NC
11 GND 12 GND
13 GND 14 5V
15 5V 16 5V
17 GND 18 DAS/DSS
19 GND 20 NC
21 NC 22 NC
Pin Layout
1
78
22

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2.5” Solid State Drive
Transcend Information Inc.
Preliminary V1.0
6
Block Diagram
Flash
Flash
Flash
Flash
Flash
Flash
Flash
Flash
Flash
Flash
Flash
Flash
Flash
Flash
Flash
Flash
S
ATA II
3
.
0Gb/s
32bits
16bits 16bits 16bits 16bits
SATA
SSD
Controller
SATA Connector
DRAM

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2.5” Solid State Drive
Transcend Information Inc.
Preliminary V1.0
7
Reliability
Wear-Leveling algorithm
The controller supports static/dynamic wear leveling. When the host writes data, the controller will find and use the block
with the lowest erase count among the free blocks. This is known as dynamic wear leveling. When the free blocks' erase
count is higher than the data blocks', it will activate the static wear leveling, replacing the not so frequently used user
blocks with the high erase count free blocks.
ECC algorithm
The controller use Reed Solomon code or BCH code option
Reed Solomon: 6Bytes/sector for 128Bytes spare and 12Bytes/sector for 218Bytes spare
BCH: 8 or 12 bits/sector for 128Bytes spare and 16bits/sector for 218Bytes spare size
Bad-block management
When the flash encounters ECC failed, program fail or erase fail, the controller will mark the block as bad block to
prevent the used of this block and caused data lost later on.

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2.5” Solid State Drive
Transcend Information Inc.
Preliminary V1.0
8
Supported ATA Command Lists

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2.5” Solid State Drive
Transcend Information Inc.
Preliminary V1.0
9
SMART
SMART subcommand sets
In order to select a subcommand the host must write the subcommand code to the device's Features Register before
issuing the SMART Function Set command. The subcommands are listed below.
SMART Read Data (subcommand D0h)
This subcommand returns the device's Attribute Values to the host. The Attribute Values consist of 512bytes.
Device Attribute Data Structure
Individual Attribute Data Structure

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2.5” Solid State Drive
Transcend Information Inc.
Preliminary V1.0
10
Attribute ID Numbers
* indicates that the corresponding Attribute Values is fixed value for compatibility.
SMART Save Attribute Values (subcommand D3h)
This subcommand causes the device to immediately save any updated Attribute Values to the device's Attribute Data
sector regardless of the state of the Attribute Autosave feature.
SMART Execute Off-line Immediately (subcommand D4h)
This subcommand causes the device to start the off-line process for the requested mode and operation. The LBA Low
register shall be set to specify the operation to be executed.
SMART Read Log Sector (subcommand D5h)
This command returns the specified log sector content to the host. LBA Low and Sector Count registers shall be set to
specify the log sector and sector number to be written.
SMART Log Directory
SMART summary error log sector