2.5” SATA SSD 3TR6-P
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V1.8 TPS, Aug., 2022
3.3 Error Detection and Correction
Innodisk 2.5”SATA SSD 3TR6-P is designed with hardware LDPC ECC engine with hard-decision
and soft-decision decoding. Low-density parity-check (LDPC) codes have excellent error
correcting performance close to the Shannon limit when decoded with the belief-propagation (BP)
algorithm using soft-decision information.
3.4 Wear-Leveling
Flash memory can be erased within a limited number of times. This number is called the erase
cycle limit
or write endurance limit
and is defined by the flash array vendor. The erase cycle
limit applies to each individual erase block in the flash device.
Innodisk 2.5” SATA SSD 3TR6-P uses a static wear-leveling algorithm to ensure that consecutive
writes of a specific sector are not written physically to the same page/block in the flash. This
spreads flash media usage evenly across all pages, thereby extending flash lifetime.
3.5 Bad Blocks Management
Bad Blocks are blocks that contain one or more invalid bits whose reliability are not guaranteed.
The Bad Blocks may be presented while the SSD is shipped, or may develop during the life time of
the SSD. When the Bad Blocks is detected, it will be flagged, and not be used anymore. The SSD
implement Bad Blocks management, Bad Blocks replacement, Error Correct Code to avoid data
error occurred. The functions will be enabled automatically to transfer data from Bad Blocks to
spare blocks, and correct error bit.
3.6 iData Guard
Innodisk’s iData Guard is a comprehensive data protection mechanism that functions before and
after a sudden power outage to SSD. Low-power detection terminates data writing before an
abnormal power-off, while table-remapping after power-on deletes corrupt data and maintains
data integrity. Innodisk’s iData Guard provides effective power cycling management, preventing
data stored in flash from degrading with use.
3.7 Garbage Collection/TRIM
Garbage collection and TRIM technology is used to maintain data consistency and perform
continual data cleansing on SSDs. It runs as a background process, freeing up valuable controller
resources while sorting good data into available blocks, and deleting bad blocks. It also
significantly reduces write operations to the drive, thereby increasing the SSD’s speed and
lifespan.
