The Seagate ST91000640SS is a 1 TB 2.5-inch SAS hard disk drive with a 6 Gb/s Serial Attached SCSI interface and 7200 RPM spindle speed, built for 24?7 enterprise use. It delivers reliable performance, excellent endurance, and compatibility with SAS-based server platforms.
Technical Specifications
Model: ST91000640SS
Capacity:1 TB (Terabyte)
Form Factor:2.5-inch (Small Form Factor)
Interface:SAS 6 Gb/s (Serial Attached SCSI Gen 2)
Spindle Speed:7200 RPM
Cache / Buffer:64 MB
Sustained Transfer Rate: Up to ~115 MB/s (typical)
Sector Size: 512 bytes (supports standard enterprise sector formats)
Shock Tolerance: Operating ~70 g, non-operating ~400 g
Vibration Tolerance: Enterprise vibration resistance for multi-drive systems
Workload Rating: Designed for heavy enterprise duty cycles
Hot-Swap Ready: Compatible with hot-plug SAS drive bays in servers and storage systems
Use Cases: Enterprise servers, storage area networks (SAN), network attached storage (NAS), virtualization hosts, RAID arrays, cloud computing and data-center storage
This drive offers a balanced mix of capacity, reliability, and performance for enterprise environments and is commonly used in data centers and business storage solutions that demand continuous operation.
The Toshiba MG03SCA100 is a 1 TB internal enterprise hard drive featuring a SAS 6 Gb/s interface, 7200 RPM spindle speed, and 64 MB cache, designed for use in servers, storage arrays, and business-critical systems.
Technical Specifications
Model: Toshiba MG03SCA100
Drive Type: Internal enterprise hard disk drive (HDD)
Capacity:1 TB
Form Factor:3.5? (Standard LFF)
Interface:Serial Attached SCSI (SAS) 6 Gb/s
Spindle Speed:7200 RPM
Cache / Buffer:64 MB
Average Latency: Approx. 4.17 ms
Average Seek Time: Around 8.5 ms
Sustained Data Transfer Rate: Up to around 155 MB/s
MTTF (Mean Time To Failure): ~1,200,000 hours
Load / Unload Cycles: Up to 600,000
Operating Conditions: Designed for continuous (24/7) operation
Shock & Vibration: Built to withstand enterprise-class vibration and shock loads
Dimensions: Approximately 147 mm ? 101.6 mm ? 26.1 mm
Weight: Approx. 720 g
Use Case: Enterprise servers, storage arrays, RAID systems, cloud data centers, virtualization hosts
The MG03SCA100 is engineered for reliable long-life service and consistent performance in demanding environments where data integrity and uptime are critical.
The WD Red 3TB 3.5″ SATA HDD is a purpose-built, internal hard drive designed for 24/7 operation in NAS and RAID environments. It typically operates at 5400 RPM (or uses IntelliPower technology) and features Western Digital’s exclusive NASware firmware (e.g., NASware 3.0), which optimizes it for NAS systems by increasing compatibility, integration, reliability, and power efficiency. With a 3TB capacity, 64MB or 256MB cache, and a SATA 6 Gb/s interface, it’s a reliable, quiet, and cool-running solution for archiving, sharing, and backing up digital content.
