Capacity: 250GB
Spindle Speed: 7,200RPM
Interface Type: SATA
Disk Size: 2.5″x15mm (SFF Hard Drive)
Sustained Throughput (MBps): 115
Average Seek Time (read/write ms): 8.5 / 9.5
Electrical Interface Speed: SATA 600 – 6.0Gbps
On-Board Cache: 64MB

Bulk data storage in a small footprint.

The Seagate® Constellation.2™ drive is the only 2.5-inch enterprise-class hard drive delivering both 1TB capacities and enterprise reliability at the INDUSTRY’S lowest power consumption for storage-hungry nearline applications. Self-Encrypting Drive (SED) and FIPS 140-2 Validated™ SED security options available to help you protect your data.

• Maximizes data center footprint with up to 76TB per square foot
• Energy efficient storage at under 3.9 watts (idle)
• Highest nearline reliability with an MTBF of 1.4M hours
• 6Gb/s performance in both SAS and SATA interfaces
• SED, FIPS encryption available on some models

• Big storage for small spaces.

  Constellation.2 hard drives can help you deploy additional enterprise storage without expanding your data center.

  With its 15mm z-height, the 1TB model is the first 2.5-inch hard drive capacity-optimized for dense, space-constrained data centers. This model can help you store twice as much data in the same footprint, supporting up to 76TB of storage per square foot.

• Unparalleled power savings.

  Constellation.2 hard drives reduce per-gigabyte cooling and energy COSTS by packing high capacities into an SFF, low-power-consumption drive.

  Included Seagate® PowerChoice™ technology can further reduce energy COSTS by empowering IT organizations to tailor systems for optimal performance and power consumption.

ecure self-encryption.

Constellation.2 hard drives are available as Self-Encrypting Drive models. SED options can improve data-at-rest security and reduce drive retirement COSTS.

Meets regulatory data security compliance requirements and is FIPS 140-2 Validated™ to protect Sensitive but Unclassified and Protected class data.

Specifications
Interface Speed	SATA 6Gb/s
Capacity	250GB
Standard Model Number	ST9250611NS
Features
Encryption	SED
Low Halogen	Yes
Reliability/Data Integrity
Mean Time Between Failures (MTBF, hours)	1.4 million
Reliability Rating @ Full 24×7 Operation (AFR)	0.62%
Nonrecoverable Read Errors per Bits Read	1 SECTOR per 10E15
Power-On Hours per Year	8760
Bytes per SECTOR	512
Limited Warranty (years) 4	3
Performance
Spindle Speed (RPM)	7200
Cache, Multisegmented (MB)	64
Interface Access Speed (Gb/s)	6.0, 3.0, 1.5
Max. Sustained Transfer Rate (MB/s)	115
Seek Time, Average Read/Write (ms)	8.5/9.5
Average Latency (ms)	4.16
Interface Ports	Single
RV Tolerance (rad/s2 to 1800Hz)	16
Power MANAGEMENT
Idle Power (W)	2.52
Typical Operating, Random Read (W)	4.35
Power Supply Requirements	+12V and +5V
PowerChoice™ TECHNOLOGY (W)5	As low as 1.19
Environmental
Temperature, Operating (°C)	5 to 60
Vibration, Operating, <400Hz (Gs)	0.5
Vibration, Nonoperating, <500Hz (Gs)	3.0
Shock, Operating, 2ms (Gs)	70
Shock, Nonoperating, 1ms and 2ms (Gs)	400
Acoustics, Typical Idle (bels)	2.2
Acoustics, Typical Seek (bels)	2.8
Physical
Height (in/mm)6	0.591/15.00
Width (in/mm)6	2.760/70.10
Depth (in/mm)6	3.955/100.45
Weight (lb/kg)	0.395/0.179
Carton Unit Quantity	30
Cartons per Pallet	50