The **LSMT2-22560-R** is a high-performance, high-density **NVMe Solid State Drive (SSD)** designed for enterprise environments and data centers. It belongs to the Samsung PM9A3 series (specifically the E1.S form factor variant). --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Model Number** | LSMT2-22560-R (PM9A3 Series) | | **Capacity** | 25.6 TB | | **Form Factor** | E1.S (Enterprise & Datacenter 1U Short) | | **Interface** | PCIe Gen4 x4 | | **Protocol** | NVMe 1.4 | | **NAND Flash Type** | Samsung V6 (128-layer) TLC V-NAND | | **Endurance** | 1.0 DWPD (Drive Writes Per Day) | --- ### 2. Electronic Components & Architecture The drive is comprised of several critical electronic subsystems that manage data integrity and high-speed transmission: #### A. The Controller The "brain" of the SSD is a proprietary Samsung PCIe Gen4 NVMe controller. * **Multi-core Architecture:** Handles high-queue depth requests. * **Hardware Encryption:** Supports AES 256-bit encryption and TCG Opal for data security. #### B. V-NAND Flash Memory The storage density is achieved through **Samsung's 6th Generation V-NAND**. * **Vertical Stacking:** Uses a 128-layer stack to maximize capacity in a small footprint. * **TLC (Triple-Level Cell):** Stores 3 bits per cell, balancing cost, capacity, and performance. #### C. DRAM Cache To manage the massive Logical-to-Physical (L2P) mapping tables for a 25.6TB drive, it includes a significant amount of **LPDDR4 DRAM**. * **Function:** Accelerates look-up speeds and improves random I/O performance. #### D. Power Loss Protection (PLP) This is a critical electronic feature for enterprise drives. * **Capacitor Bank:** The PCB includes a row of tantalum capacitors or integrated power management ICs (PMICs). * **Function:** In the event of a sudden power failure, the energy stored in these capacitors provides enough time for the controller to flush "data in flight" from the volatile DRAM cache to the non-volatile NAND. --- ### 3. Physical & Thermal Design (E1.S) Unlike standard M.2 drives, the **E1.S form factor** (used by this model) includes specific electronic considerations: * **Hot-Plug Support:** The connector is designed for "surprise removal" and insertion while the server is powered. * **Integrated Heat Spreader:** The metal casing acts as a heatsink, essential for maintaining Gen4 speeds without thermal throttling. --- ### 4. Performance Metrics | Operation | Speed | | :--- | :--- | | **Sequential Read** | Up to 6,800 MB/s | | **Sequential Write** | Up to 4,000 MB/s | | **Random Read (4KB)** | Up to 1,000K IOPS | | **Random Write (4KB)** | Up to 180K IOPS |