Advantech SQF-S10 630 handleiding
Handleiding
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SQFlash
CFast 630
Specifications subject to change without notice, contact your sales representatives for the most update information.
REV 1.1 Page 8 of 26 Aug. 10, 2020
4. General Description
Advanced NAND Flash Controller
Advantech SQFlash CFast
TM
includes Bad Block Management Algorithm, Wear Leveling Algorithm and Error
Detection / Correction Code (EDC/ECC) Algorithm.
Bad Block Management
Bad blocks are blocks that contain one or more invalid bits of which the reliability is not guaranteed. Bad blocks
may be representing when flash is shipped and may developed during life time of the device.
Advantech SQFlash CFast
TM
implement an efficient bad block management algorithm to detect the factory
produced bad blocks and manages any bad blocks that may develop over the life time of the device. This
process is completely transparent to the user, user will not aware of the existence of the bad blocks during
operation.
Wear Leveling
NAND Type flash have individually erasable blocks, each of which can be put through a finite number of erase
cycles before becoming unreliable. It means after certain cycles for any given block, errors can be occurred
in a much higher rate compared with typical situation. Unfortunately, in the most of cases, the flash media will
not been used evenly. For certain area, like file system, the data gets updated much frequently than other
area. Flash media will rapidly wear out in place without any rotation.
Wear leveling attempts to work around these limitations by arranging data so that erasures and re-writes are
distributed evenly across the full medium. In this way, no single sector prematurely fails due to a high
concentration of program/erase cycles.
Advantech SQFlash CFast
TM
provides advanced wear leveling algorithm, which can efficiently spread out the
flash usage through the whole flash media area. By implement both dynamic and static wear leveling
algorithms, the life expectancy of the flash media can be improved significantly.
Error Detection / Correction
Advantech SQFlash CFast
TM
utilizes BCH ECC Algorithm which offers one of the most powerful ECC
algorithms in the industry. This algorithm can support 72 bit ECC correct per 1K Byte data.
Power Loss Protection: Flush Manager
Power Loss Protection is a mechanism to prevent data loss during unexpected power failure. DRAM is a
volatile memory and frequently used as temporary cache or buffer between the controller and the NAND flash
to improve the SSD performance. However, one major concern of the DRAM is that it is not able to keep data
during power failure. Accordingly, SQFlash SSD applies the Flush Manager technology, only when the data is
fully committed to the NAND flash will the controller send acknowledgement (ACK) to the host. Such
implementation can prevent false-positive performance and the risk of power cycling issues.
In addition, it is critical for a controller to shorten the time the in-flight data stays in the controller internal cache.
Thus, SQFlash applies an algorithm to reduce the amount of data resides in the cache to provide a better
performance. With Flush Manager, incoming data would only have a “pit stop” in the cache and then move to
NAND flash directly. Also, the onboard DDR will be treated as an “organizer” to consolidate incoming data into
groups before written into the flash to improve write amplification.
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 which blocks of data
are no longer in use and can be removed permanently. Thus, the SSD will perform the erase action, which
prevents unused data from occupying blocks all the time
Bekijk gratis de handleiding van Advantech SQF-S10 630, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Advantech |
| Model | SQF-S10 630 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 4154 MB |
Caratteristiche Prodotto
| Kleur van het product | Zwart, zilver |
| Breedte | 42.8 mm |
| Diepte | 3.3 mm |
| Hoogte | 36.4 mm |
| Certificering | FCC |
