Western Digital Blue SA510 1000GB

The Western Digital Blue SA510 utilizes a DRAM-less architecture, marking a departure from previous Blue SATA drives that used dedicated cache buffering. The drive is managed by a proprietary SanDisk controller (typically the 20-82-10023-A1) paired with Kioxia/SanDisk BiCS5 112-layer TLC NAND. By removing the DRAM module, the drive relies on static and dynamic SLC caching to saturate the SATA III interface limits during burst workloads, though sustained performance is contingent on the controller's ability to manage background data folding without external buffering. The SA510 has faced scrutiny for firmware stability, specifically an issue where drives could lose data or become undetectable upon initial deployment; Western Digital released firmware version 451030WD (or later) to address these concerns, and updating the firmware immediately upon installation is recommended. Analysts note the SA510 effectively replaces the older WD Blue 3D NAND, but due to the removal of DRAM, it performs closer to the entry-level WD Green series in random I/O heavy workloads than its direct predecessor.

Key Specifications

• Capacity: 1000GB
• Interface: SATA III 6Gb/s
• Form Factor: 2.5" / 7mm
• Sequential Read/Write: 560 MB/s / 520 MB/s
• Controller: SanDisk 20-82-10023-A1 (Proprietary)
• NAND Flash: BiCS5 112-Layer TLC
• DRAM Cache: None (DRAM-less)
• Endurance: 400 TBW
• Encryption: No hardware-based encryption support

Hardware Alternatives

• Crucial BX500 1000GB: Shares the same DRAM-less architectural philosophy, serving as a direct functional alternative for basic storage needs.
• Samsung 870 EVO 1000GB: Represents the primary performance competitor in the SATA segment; unlike the SA510, the 870 EVO retains a dedicated DRAM cache, offering higher sustained write consistency.
• WD Blue 3D NAND (Legacy): The SA510's predecessor; while they share branding, the older model is technically superior in mixed-use environments due to the presence of a Marvell controller and dedicated DRAM.