Western Digital Red SA500 4TB 2.5" NAS SATA SSD

Product Overview

The WD Red SA500 4TB 2.5" NAS SATA SSD (WDS400T2R0A) is a high-endurance internal solid-state drive manufactured by Western Digital. Purpose-built specifically for 24/7 always-on Network Attached Storage (NAS) appliances, high-density Video Management System (VMS) servers, virtual machine clusters, and multi-user surveillance databases, this enterprise SATA SSD delivers high-speed caching and primary all-flash tiering to eliminate mechanical drive latency and IOPS bottlenecks.

Fabricated with Western Digital's proven 3D NAND flash architecture, the SA500 series delivers sustained sequential read speeds up to 560 MB/s and write speeds up to 520 MB/s, pushing standard SATA 6.0 Gb/s bus performance to its interface maximum. Engineered to handle intensive continuous read and write loads demanded by multi-tier storage pools, it boasts an endurance rating of 2,500 TBW (Terabytes Written) and a 2.0 million-hour MTTF. It is ideal for security system integrators and enterprise IT environments requiring fast database indexing, video event metadata caching, and low-latency multi-channel playback scrubbing without mechanical noise or heat generation.

✅ Key Features

• Purpose-Built NAS & Server SSD: Optimized specifically for continuous 24/7 read/write cycles and fast tiering in multi-bay storage environments.

• Massive 4TB Solid-State Capacity: Expansive all-flash storage volume designed for direct primary storage, OS hosting, or high-capacity caching pools.

• Exceptional Write Endurance (2,500 TBW): Industrial-tier write endurance built to sustain continuous database logging, overwriting, and video metadata streaming.

• Maximized SATA III Throughput: Sequential read speeds up to 560 MB/s and write speeds up to 520 MB/s dramatically accelerate data transfers.

• High Random I/O Performance: Up to 87,000 IOPS read and 83,000 IOPS write for immediate indexing and rapid multi-client access.

• Reduced Latency & Fast Playback: Eliminates mechanical head seek delays for smooth video playback scrubbing and instantaneous event retrieval.

• Low Power & Cool Operation: Consumes significantly less power than mechanical drives, minimizing heat buildup inside multi-drive rackmount enclosures.

• Superior Physical Durability: Solid-state architecture with no moving parts offers 1,500G shock resistance and silent acoustic operation.

📸 Compatible Devices

• Network Attached Storage (NAS) appliances (QNAP, Synology, TerraMaster, Asustor) with 2.5" SATA bays

• Enterprise Video Management System (VMS) and Central Management System (CMS) recording servers

• High-performance video editing workstations, media streaming servers, and database host nodes

• Hypervisor virtualization hosts (Proxmox, VMware ESXi, Hyper-V) and software NVR containers

• Multi-bay RAID arrays and all-flash storage expansion chassis (RAID 0, 1, 5, 6, 10)

🕐 Approximate Video / Database Caching Capacity at 4TB

• 4-Camera System @ 1080p (H.264, 15fps): ~40–56 days of continuous recording

• 4-Camera System @ 1080p (H.265, 15fps): ~80–112 days of continuous recording

• 8-Camera System @ 1080p (H.265, 15fps): ~40–56 days of continuous recording

• 16-Camera System @ 1080p (H.265, 15fps): ~20–28 days of continuous recording

• 4-Camera System @ 4MP (2K, H.265, 15fps): ~48–64 days of continuous recording

• NAS Fast Read/Write Caching: Millions of metadata index logs, event thumbnails, and instantaneous database transactions

Note: While the SA500 can function as high-speed primary surveillance recording storage, it is most widely deployed in VMS and NAS topologies as an ultra-fast read/write cache pool or database volume to accelerate search and retrieval across high-capacity mechanical hard drive arrays.