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NAS HDD Product Manual, Rev. A 11
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.
ST4000VN000 ST3000VN000 ST2000VN000
Table 1 Drive specifications summary for 4TB, 3TB and 2TB models
Drive Specification* ST4000VN000 ST3000VN000 ST2000VN000
Formatted capacity (512 bytes/sector)** 4000GB (4TB) 3000GB (3TB) 2000GB (2TB)
Guaranteed sectors 7,814,037,168 5,860,533,168 3,907,029,168
Heads 8 8 4
Disks 4 4 2
Bytes per sector (4K physical emulated at 512-byte
sectors)
4096 4096 4096
Default sectors per track 63 63 63
Default read/write heads 16 16 16
Default cylinders 16,383 16,383 16,383
Recording density (max) 1807kFCI 1550kFCI 1807kFCI
Track density (avg) 340ktracks/in 340ktracks/in 352ktracks/in
Areal density (avg) 625Gb/in
2
536Gb/in
2
625Gfc/in2
Internal data transfer rate (max) 1813Mb/s 1813Mb/s 1813Mb/s
Maximum sustained data rate, OD read (MB/s) 180MB/s 180MB/s 159MB/s
ATA data-transfer modes supported PIO modes: 0 to 4
Multiword DMA modes:
0 to 2
Ultra DMA modes 0 to 6
I/O data-transfer rate (max) 600MB/s 600MB/s 600MB/s
Cache buffer 64MB 64MB 64MB
Height (max) 26.1mm / 1.028 in 26.1mm / 1.028 in 26.1mm / 1.028 in
Width (max) 101.6mm /4.0 in (+
0.010 in)
101.6mm /4.0 in (+
0.010 in)
101.6mm /4.0 in (+
0.010 in)
Length (max) 146.99mm / 5.787 in 146.99mm / 5.787 in 146.99mm / 5.787 in
Weight (typical) 610g / 1.345 lb 610g / 1.345 lb 535g / 1.18 lb
Average latency 5.1ms 5.1ms 5.1ms
Power-on to ready (max) <17.0s <17.0s <17.0s
Standby to ready (max) <17.0s <17.0s <17.0s
Average seek, read (typical)
Average seek, write (typical)
<12.0ms
<12.0ms
<12.0ms
<12.0ms
<12.0ms
<12.0ms
Startup current (typical) 12V 2.0A 2.0A 2.0A
Voltage tolerance (including noise) 5V: ±5%
12V: ±10%
5V: ±5%
12V: ±10%
5V: ±5%
12V: ±10%