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EconoSLC™ Based Industrial 1.8” SATA SSDs

EconoSLC™ Based Industrial 1.8″ SATA SSDs

InterfaceSATA III (up to 6Gb/s)
Connector7 Pin Data / 9 Pin Power
Physical Form Factor78.5mm (L) x 54mm (W) x 5mm (H)
Industry StandardSATA revision 3.0 – 6 Gbit/s – 600 MB/s
Flash Type Toshiba A19 MLC
Density 8GB – 128GB
Data Retention 10 years FOB / 1 Year EOL
Operating Temperature Commercial: 0°C to 70°C
Industrial: -40°C to 85°C
Shock 1500 G
Vibration 20 G
Humidity85% RH 85°C, 1000 Hrs
Read Performanceup to 520 MB/s
Write Performanceup to 355 MB/s
Voltage3.3 VDC
Power – ReadUp to 2,395mW
Power – WriteUp to 4,135mW
Power – DEVSLP Up to 295mW
Part NumberEN-E08XXXGGPX

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    Envoy Data Memory’s 1.8″ SATA SSDs deliver all the advantages of Flash Disk technology with Serial ATA III interface, including being fully compliant with standard 1.8-inch form factor, providing low power consumption compared to traditional hard drive and hot-swapping when removing/replacing/upgrading flash disks. The capacity could provide a wide range up to 256GB and the performance reach up to 500MB/s read as well as 200MB/s write based on Toshiba’s toggle MLC flash (with 256MB/512MB DDR3 cache enabled and measured by CrystalDiskMark v3.0). Meanwhile, the power consumption is much lower than traditional hard drives.

    Solid State Drives (SSDs) are very robust and low power replacements for Hard Disk Drives (HDDs). SSDs have no moving parts, so vibration and shock tolerance are greatly improved over mechanical Hard Disk Drives, resulting in a much better solution for mobile applications. Serial ATA (SATA) SSDs use the standard SATA interface, and are capable of up to 6Gbps transfer rates (SATA III).

    Envoy Data Memory offers a broad selection of SATA SSD products that meet the harshest of applications in both commercial and industrial memory markets. Our SATA 1.8″ SSDs are offered in commercial or industrial temperature range, made with Econo Single Level Cell (EconoSLC) NAND Flash.

    Flash ManagementError Correction Code (ECC). Flash memory cells will deteriorate with use, which might generate random bit errors in the stored data. Thus, ENVOY’S SATA SSD applies the BCH ECC Algorithm, which can detect and correct errors occur during Read process, ensure data been read correctly, as well as protect data from corruption.
    Wear Leveling NANDFlash devices can only undergo a limited number of program/erase cycles, and in most cases, the flash media are not used evenly. If some areas get updated more frequently than others, the lifetime of the device would be reduced significantly. Thus, Wear Leveling technique is applied to extend the lifespan of NAND Flash by evenly distributing write and erase cycles across the media. Envoy Data Memory 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.
    Bad Block ManagementBad blocks are blocks that include one or more invalid bits, and their reliability is not guaranteed. Blocks that are identified and marked as bad by the manufacturer are referred to as “Initial Bad Blocks”. Bad blocks that are developed during the lifespan of the flash are named “Later Bad Blocks”. Envoy Data Memory implements an efficient bad block management algorithm to detect the factory-produced bad blocks and manages any bad blocks that appear with use. This practice further prevents data being stored into bad blocks and improves the data reliability.
    TRIMTRIM 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.
    SMARTSMART, an acronym for Self-Monitoring, Analysis and Reporting Technology, is an open standard that allows a hard disk 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 of impending failures while there is still time to perform proactive actions, such as copy data to another device.
    Over-ProvisionOver Provisioning refers to the inclusion of extra NAND capacity in a SSD, which is not visible and cannot be used by users. 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.
    Firmware UpgradeFirmware can be considered as a set of instructions on how the device communicates with the host. Firmware will be upgraded when new features are added, compatibility issues are fixed, or read/write performance gets improved. Low Power Management.
    DIPM/HIPM ModeSATA interfaces contain two low power management states for power saving: Partial and Slumber modes. For Partial mode, the device has to resume to full operation within 10 microseconds, whereas the device will spend 10 milliseconds to become fully operational in the Slumber mode. SATA interfaces allow low power modes to be initiated by Host (HIPM, Host Initiated Power Management) or Device (DIPM, Device Initiated Power Management). As for HIPM, Partial or Slumber mode can be invoked directly by the software. For DIPM, the device will send requests to enter Partial or Slumber mode.
    Power Loss Protection: Flushing MechanismPower 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, the ENVOY applies the GuaranteedFlush Technology, which requests the controller to transfer data to the cache. DDR performs as a cache, and its sizes include 256MB or 512MB. 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. Additionally, it is critical for a controller to shorten the time the in-flight data stays in the cache. Thus, Envoy Data Memory’s PS3108 applies an algorithm to reduce the amount of data resides in the cache to provide a better performance. This SmartCacheFlush technology allows incoming data to only have a “pit stop” in the cache and then move to the NAND flash at once. If the flash is jammed due to particular file sizes (random 4K), the cache will be treated as an “organizer”, consolidating incoming data into groups before written into the flash to improve write amplification. In sum, with this Flush Management, ENVOY proves to provide the reliability required by consumer, industrial, and enterprise-level application. Advanced device security features.
    Secure EraseSecure Erase is a standard ATA command and will write all “0xFF” to fully wipe all the data on hard drives and SSDs. When this command is issued, the SSD controller will empty its storage blocks and return to its factory default settings.
    Write Protect When a SSD contains too many bad blocks and data are continuously written in, then the SSD might not be used anymore. Thus, Write Protect is a mechanism to prevent data from being written in and protect the accuracy of data that are already stored in the SSD. 1.8. SSD Lifetime Management.
    Terabytes Written (TBW) TBW (Terabytes Written) is a measurement of SSDs’ expected lifespan, which represents the amount of data written to the device. To calculate the TBW of a SSD, the following equation is applied: TBW = [(NAND Endurance) x (SSD Capacity) x (WLE)] / WAF NAND Endurance: NAND endurance refers to the P/E (Program/Erase) cycle of a NAND flash. SSD Capacity: The SSD capacity is the specific capacity in total of a SSD. WLE: Wear Leveling Efficiency (WLE) represents the ratio of the average amount of erases on all the blocks to the erases on any block at maximum. WAF: Write Amplification Factor (WAF) is a numerical value representing the ratio between the amount of data that a SSD controller needs to write and the amount of data that the host’s flash controller writes. A better WAF, which is near 1, guarantees better endurance and lower frequency of data written to flash memory. An Adaptive Approach to Performance Tuning.
    ThroughputBased on the available space of the disk, ENVOY will regulate the read/write speed and manage the performance of throughput. When there still remains a lot of space, the firmware will continuously perform read/write action. There is still no need to implement garbage collection to allocate and release memory, which will accelerate the read/write processing to improve the performance. Contrarily, when the space is going to be used up, ENVOY will slow down the read/write processing, and implement garbage collection to release memory. Hence, read/write performance will become slower.
    Predict & FetchNormally, when the Host tries to read data from the SSD, the SSD will only perform one read action after receiving one command. However, ENVOY applies Predict & Fetch to improve the read speed. When the Host issues sequential read commands to the SSD, the SSD will automatically expect that the following will also be read commands. Thus, before receiving the next command, flash has already prepared the data. Accordingly, this accelerates the data processing time, and the host does not need to wait so long to receive data.

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