Seagate Constellation ST9500431SS Serial SCSI / SAS Hard Drive

Capacity: 500GB
Spindle Speed: 7,200RPM
Interface Type: SAS / Serial Attached SCSI
Disk Size: 2.5″x15mm (SFF Hard Drive)
Sustained Throughput (MBps): 97
Average Seek Time (read/write ms): 8.5 / 9.5
Electrical Interface Speed: SAS-2 / Serial Attached SCSI (Generation 2) – 6.0Gbps 
On-Board Cache: 16MB

Key Advantages

• Industry’s first 2.5-inch, 15-mm enterprise-class nearline drive for dense, space-constrained data centers
• Lowest operating power and enhanced PowerChoice™ host-selectable power options for unprecedented power savings (up to 54 percent—as low as 1.1 W) during slow or idle periods
• The industry’s highest-reliability 7200-RPM drive, designed for 24×7 operation
• Best-in-class rotational vibration tolerance ensures unrivalled performance in high spindle-density applications, and multi-drive firmware maximizes system availability.
• Choose SAS for the seamless Tier 2 enterprise experience, with improved data integrity. SAS 2.0 enables faster data access (6Gb/s) and larger topologies over greater distances, increasing system scalability, data throughput and connectivity.
• Government-grade Self-Encrypting Drive security available on SAS models.

Best-Fit Applications

• Storage-hungry business applications
• Storage area networks (SAN) and network attached storage (NAS)
• Maximum-capacity servers and blade servers
• Rich media content storage—audio, video, image
• Reference and compliance data storage
• Enterprise backup and restore—D2D, virtual tape
• Collaboration—email, messaging
• Infrastructure—Web, print, file
  

  Drive specification	ST9500431SS (SED)
  Formatted Gbytes (512 bytes/sector)	500
  Self Encrypting Drive (SED) Government Grade Security	Yes
  Bytes per sector	512
  Spindle speed (RPM)	7,200
  I/O data transfer rate (MBps)	600
  Cache buffer	16
  Interface Type	6.0Gbps SAS
  Average latency	4.16 ms
  Seek time (read / write) ms	8.5 / 9.5
  Track-to-track seek (read / write) ms	0.8 / 1.0
  Dimensions (HxLxW) mm	14.8 / 100.5 / 70
  Weight	0.196 kg
  Operating Shock (Read)	70G, 2ms
  Non-operating Shock	400G, 2ms
  Temperature – Operating	5C -55C
  Temperature – Non-operating	-40C – 70C
  Current Requirements 12VDC (Read/Write, Idle)	3.5w / 2.6w