|
Drive
specification |
ST8000DM0004 |
|
Formatted (512
bytes/sector) |
8TB |
|
|
|
Heads |
14 |
|
Discs |
7 |
|
Bytes per logical
sector |
512 |
|
Bytes per physical
sector |
4096 |
|
Recording density, KBPI
(Kb/in max) |
2230 |
|
Track density, KTPI
(ktracks/in avg.) |
386 |
|
Areal density, (Gb/in2
avg) |
867 |
|
Spindle speed
(RPM) |
7200 |
|
Internal data transfer
rate (Mb/s max) |
2695 |
|
Max sustained transfer
rate, OD read (MB/s) |
220 |
|
I/O data-transfer rate
(MB/s max) |
600 |
|
ATA data-transfer modes
supported |
PIO modes 04 Multiword
DMA modes 02
Ultra DMA modes 06 |
|
Cache
buffer |
256MB |
|
Weight:
(maximum) |
650g (1.43
lb) |
|
Average
latency |
4.16ms |
|
Power-on to ready (sec)
(typ/max) |
20/30 |
|
Standby to ready (sec)
(typ/max) |
20/30 |
|
Startup current
(typical) 12V (peak) |
<=1.8A |
|
Voltage tolerance
(including noise) |
5V 5%
12V
10% |
|
Non-Operating (Ambient
C) |
40 to
70 |
|
Operating ambient
temperature (min C) |
0 |
|
Operating temperature
(drive case max C) |
60
|
|
Temperature gradient (C
per hour max) |
20C (operating) 30C
(non-operating) |
|
Relative
humidity |
5% to 95%
(operating)
5% to 95% (non-operating) |
|
Relative humidity
gradient |
30% per hour
max |
|
Altitude,
operating |
304.8 m to 3,048
m
(1000 ft to 10,000+ ft) |
|
Altitude, non-operating
(below mean sea level, max) |
304.8 m to 12,192
m
(1000 ft to 40,000+ ft) |
|
Operational Shock (max
at 2 ms) |
Read 70 Gs / Write 40
Gs |
|
Non-Operational Shock
(max at 2 ms) |
250
Gs |
|
Vibration,
operating |
522 Hz: 0.25 Gs, Limited displacement
22350 Hz: 0.50
Gs
350500 Hz: 0.25 Gs |
|
Vibration,
non-operating |
2500 Hz: 2.27 Grms
ref |
|
|
|
Idle |
2.8 (typical)
3.0
(max) |
|
Performance
seek |
3.2 (typical)
3.4
(max) |
|
Non-recoverable read
errors |
1 sector per 1015 bits
read |
|
Annualized Failure Rate
(AFR) |
<1% based on 8760
POH |
|
Rated
Workload |
Average annualized
workload rating: <300TB/year
The AFR specification for the product
assumes the I/O workload does not exceed the average annualized workload
rate limit of 300 TB/year. Workloads exceeding the annualized rate may
degrade the product AFR and impact reliability as experienced by the
particular application. The average annualized workload rate limit is in
units of TB per calendar year. |
|
Load-unload
cycles |
300,000 |
|
Supports Hotplug
operation per Serial ATA Revision 3.2 specification |
Yes |
