HGST Ultrastar™ 7K4000 is the world’s first 4TB 7200 RPM hard drive with a 2.0 million hours MTBF specification and backed by a full 5-year warranty, originally offered with SATA 6Gb/s and now also available with a SAS interface. Ultrastar 7K4000 represents the sixth-generation HGST 5-platter design, which has been field proven by top server and storage OEMs and Internet giants. Engineered for the highest quality, the Ultrastar 7K4000 is put through grueling design tests during development and must pass stringent ongoing reliability testing during manufacturing. Ultrastar 7K4000 delivers by reducing downtime, eliminating service calls and minimizing TCO.

Interface	SATA 6Gb/s	SAS 6Gb/s
Capacity (GB)	4TB / 3TB / 2TB	4TB / 3TB / 2TB
Sector size (variable, Bytes/sector)	512e / 512n	4TB / 3TB / 2TB
Max Areal Density (Gbits/sq. in.)	446 // 475	475
Performance
Data Buffer (MB)	64	64
Rotational Speed (RPM)	7200	7200
Interface transfer rate (MB/sec, max)	600	600
Sustained transfer rate (MB/sec, typ.)	171 //181	172
Seek Time (read, ms, typical)	8.0	8.0
Reliability
Error Rate (non-recoverable, bits read)	1 in 10^15	1 in 10^15
MTBF (M hours)	2.0	2.0
Load/Unload Cycles	600,000	600,000
Availability (hrs/day x days/wk)	24x7	24x7
Acoustics
Idle (Bels)	2.9	2.9
Power
Requirement	+5 VDC(+/-5%) +12 VDC (+10%/-8%)	+5 VDC(+/-5%) +12 VDC (+10%/-8%)
Requirement: Start-up (W, peak, max)	1.2A (+5V), 2.0A (+12V)	1.2A (+5V), 2.0A (+12V)
Requirement: Read/Write (W, avg)	11.4	10.9
Unload Idle (W)	5.7	6.2
Physical size
Z-Height (mm)	26	26
Dimensions (width x depth, mm)	101.6 (+/-0.25) x 147	101.6 (+/-0.25) x 147
Weight (g, max)	690	690
Environmental (operating)
Ambient temperature	5º to 60º C	5º to 60º C
Shock (half-sine wave)	70	70
Vibration (5 to 500 Hz)	0.67 (XYZ)	5º to 60º C
Environmental (non-operating)
Ambient temperature	-40º to 70º C	-40º to 70º C
Shock (half-sine wave)	300	300
Vibration (5 to 500 Hz)	1.04 (XYZ)	1.04 (XYZ)