MSATA SSD 128GB

1.2 Flash Management
 

1.2.1 Error Correction Code
Flash memory cells will deteriorate with use, which might generate random bit errors in the stored data. Thus, HG2259
SSD applies the LDPC (Low Density Parity Check) of ECC algorithm, which can detect and correct errors occur during
read process, ensure data been read correctly, as well as protect data from corruption.
 

1.2.2 Wear Leveling
NAND flash devices can only undergo a limited number of program/erase cycles, when flash media is not used evenly,
some blocks get updated more frequently than others and the lifetime of device would be reduced significantly. Thus,
wear leveling is applied to extend the lifespan of NAND flash by evenly distributing write and erase cycles across the
media.We provides advanced wear leveling algorithm, which can efficiently spread out the flash usage through the
whole flash media area. Moreover, by implementing both dynamic and static wear leveling algorithms, the life
expectancy of the NAND flash is greatly improved.

1.2.3 Bad Block Management
Bad blocks are blocks that do not function properly or contain more invalid bits causing stored data unstable, and their
reliability is not guaranteed. Blocks that are identified and marked as bad by the manufacturer are referred to as "Early
Bad Blocks". Bad blocks that are developed during the lifespan of the flash are named "Later Bad Blocks". Hosin Global
implements an efficient bad block management algorithm to detect the factory-produced bad blocks and manages bad
blocks that appear with use. This practice prevents data being stored into bad blocks and further improves the data
reliability.

1.2.4 TRIM

TRIM is a feature which helps improve the read/write performance and speed of solid state drives (SSD). Unlike hard
disk drives (HDD), SSDs are not able to overwrite existing data, so the available space gradually becomes smaller with
each use. With the TRIM command, the operating system can inform the SSD so that blocks of data that are no longer in
use can be removed permanently. Thus, the SSD will perform the erase action, which prevents unused data from
occupying blocks at all time.

1.2.5 SMART
SMART, an acronym for Self-Monitoring, Analysis and Reporting Technology, is an open standard that allows a solidstate
drive to automatically detect its health and report potential failures. When a failure is recorded by SMART, users
can choose to replace the drive to prevent unexpected outage or data loss. Moreover, SMART can inform users
impending failures while there is still time to perform proactive actions, such as save data to another device.

1.2.6 Over- Provision
Over Provisioning refers to the preserving additional area beyond user capacity in an SSD, which is not visible to users
and cannot be used by them. However, it allows an SSD controller to utilize additional space for better performance and
WAF. With Over Provisioning, the performance and IOPS (Input/ Output Operations per Second) are improved by
providing the controller additional space to manage P/E cycles, which enhances the reliability and endurance as well.
Moreover, the write amplification of the SSD becomes lower when the controller writes data to the flash.

3 ENVIRONMENTAL SPECIFICATIONS
3.1 Environmental Conditions
3.1.1 Temperature and Humidity
   Temperature:
   Storage: -40°C to 85°C
   Operating: 0°C to 70°C
   Humidity: RH 90% under 40°C (operating)

3.1.2 Electrostatic Discharge (ESD)

4.0 PHYSICAL DIMENSION

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