Твърд диск 1TB HITACHI Ultrastar™ A7K1000, SATA2, 7200rpm, 32MB, 3.5"(8.89 cm)

Hitachi’s Ultrastar A7K1000

The Ultrastar A7K1000 delivers up to 1TB of storage capacity in a standard 3.5-inch form factor, filling a vital need for high-density storage in the enterprise. With a unique 5-platter design, Hitachi has relaxed the bit densities to achieve higher reliability. The Ultrastar A7K1000 is built using the industry’s most reliable perpendicular magnetic recording (PMR) recording heads and media. The Ultrastar A7K1000 features a 3 GB/s SATA interface supporting key features in the Serial-ATA specification including Native Command Queuing (NCQ), staggered spin-up and hot-swap capability.


Configuration
Interface 3 Gb/s SATA
Capacity 1 TB
Recording zones 30
Max areal density (Gbits/sq. in.) 148

Performance

Data buffer (MB) 32
Rotational speed (RPM) 7200
Latency average (ms) 4.17
Media transfer rate (Mbits/sec, max) 1070
Interface transfer rate (MB/sec, max) 300
Sustained transfer rate (MB/sec) 85 - 42 (zone 0-29)
Seek time (read, typical, ms) 8.2Reliability

Reliability

Error rate (non-recoverable, bits read) 1 in 10^15
Start/stops (at 40˚ C) 50,000
Availability (days/week) 24 x 7
Targeted MTBF (hours) 1,200,000

Acoustics

Idle (Bels) 2.9Power
Requirement +5 VDC (+ -5%), +12 VDC (+ 20% - 8%)
Startup current (max. A) 2.0 (+ 12V) & 1.2 (+ 5V)
Idle (W) 9.0
Power consump. efficiency index (W/GB) 0.009

Physical size
z-height (mm, max) 26.1
Dimensions (width x depth, mm) 101.6 x 147
Weight (g, max) 700

Environmental (operating)

Ambient temperature 5o to 60o C
Shock (half-sine wave, G/2ms) 70
Vibration, random (G RMS 5 to 500 Hz) 0.67, all axes

Environmental (non-operating)

Ambient temperature -40o to 70o C
Shock (half-sine wave, G/1ms) 300
Vibration, random (G RMS 2 to 200 Hz) 1.04, all axes

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