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Seagate Desktop SSHD Product Manual, Rev. C 3
www.seagate.com Drive Specifications
2.0 Drive Specifications
Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal power.
For convenience, the phrases the drive and this drive are used throughout this manual to indicate the following
drive models:
2.1 Specification summary tables
The specifications listed in Table 1 are for quick reference. For details on specification measurement or definition,
refer to the appropriate section of this manual.
ST4000DX001 ST2000DX001 ST1000DX001
Table 1 Drive specifications summary for 4TB, 2TB and 1TB models
Drive Specification* ST4000DX001 ST2000DX001 ST1000DX001
Formatted capacity (512 bytes/sector)** 4000GB (4TB) 2000GB (2TB) 1000GB (1TB)
Guaranteed sectors 7,814,037,168 3,907,029,168 1,953,525,168
Heads 8 4 2
Disks 4 2 1
NAND flash Commercial Multilevel Cell
(cMLC)/size
cMLC/8GB
Bytes per sector
(4K physical emulated at 512-byte sectors)
4096
Default sectors per track 63
Default read/write heads 16
Default cylinders 16,383
Recording density (max) 1807kFCI
Track density (avg) 340ktracks/in
Areal density (avg) 625Gb/in
2
Spindle speed 5900 RPM 7200 RPM
Internal data transfer rate (max) 1813Mb/s 2147Mb/s
Average data rate, read/write (MB/s) 146MB/s 156MB/s
Maximum sustained data rate, OD read (MB/s) 180MB/s 210MB/s
I/O data-transfer rate (max) 600MB/s
Cache buffer 64MB
Height (max) 26.1mm / 1.028 in 20.17mm / 0.7825 in
Width (max) 101.6mm /4.0 in (+ 0.010 in)
Length (max) 146.99mm / 5.787 in
Weight (typical) 610g / 1.345 lb 535g / 1.18 lb 400g / 0.88 lb
Average latency 5.1ms 4.16ms
Power-on to ready (max)
‡
<1.0s <1.0s
Standby to ready (max)
‡
<1.0s <1.0s
Average seek, read (typical)
Average seek, write (typical)
<12.0ms typical
<12.0ms typical
<8.5ms (read)
<9.5ms (write)
Startup current 12V 2.0A
Voltage tolerance (including noise)
5V: ±5%
12V: ±10%
5V: ±5%
12V: +10% / -7.5%
Ambient temperature
0° to 60°C (operating)
–40° to 70°C (nonoperating)
Temperature gradient
20°C per hour max (operating)
30°C per hour max (nonoperating)
Relative humidity
5% to 90% (operating)
5% to 95% (nonoperating)
5% to 95% (operating)
5% to 95% (nonoperating)
Relative humidity gradient (max) 30% per hour