HGST is shipping a new Endurastar J4K320 family, a single-platter
hard disk drive (HDD) specifically designed for the automotive
infotainment and telematics markets.
As HGST's sixth generation automotive HDD, the new Endurastar J4K320
family is built to operate in extreme and varying temperatures and
altitudes. The Endurastar J4K320 operates at altitudes of up to 5500
meters (18,044.62 feet), supports an operating temperature range of
-30°C to +85°C (-22°F to 185°F), and has improved operating shock
tolerance of 300G (2ms) and a non-operating shock of 800G (ms).
In early in 2006, HGST was granted a patent for its Thermal
Fly-height Control (TFC) feature, which can compensate the head/media
distance variations caused by altitude and temperature changes. The
company says it has designed and tested the Endurastar J4K320 HDD
beyond most industry specifications. The Endurastar J4K320 is HGST's
second-generation automotive HDD to apply TFC.
The Endurastar J4K320 family comes in 320GB, 250GB, 200GB, 100GB and
80GB capacities, operates at 4260 RPMs and features a SATA interface.
The drive family is based on a standard 9.5mm 2.5-inch form factor.
The HGST Endurastar J4K320 family is currently shipping.
Model(s) |
- HEJ423232H9E300
- HEJ423225H9E300
- HEJ423220H9E300
- HEJ423210H9E300
- HEJ423280H9E300
|
Interface |
SATA
1.5Gb/s |
Capacity (GB) |
320 /
250 / 200 / 100 / 80 |
Sector
size (variable, Bytes/sector) |
512e
|
Recording zones |
31
|
Data
Heads (physical) |
2
|
Data
Disks |
1
|
Max
Areal Density (Gbits/sq. in.) |
425
|
Performance |
Data
Buffer (MB) |
8
|
Rotational Speed (RPM) |
4260
|
Latency Average (ms) |
7.04
|
Media
transfer rate (Mbits/sec, max) |
750
|
Interface transfer rate (MB/sec, max) |
150
|
Seek
Time (read, ms, typical) |
13
|
Reliability |
Error
Rate (non-recoverable, bits read) |
< 1
per 10^13 bits transferred |
Load/Unload Cycles |
600,000 |
Acoustics |
|
Idle
(Bels) |
2.4
|
Operational (Bels, typical) |
3.0
|
Power |
Requirement |
+5 VDC
(+/-5%) |
Requirement: Start-up (W, peak, max) |
6.5
|
Requirement: Read/Write (W, avg) |
2.15
|
Low
power idle (W, avg) |
0.8
|
Requirement: Standby (W, avg) |
0.2
|
Dissipation: Sleep (W) |
0.14
|
Physical size |
Z-Height (mm) |
9.5
|
Dimensions (width x depth, mm) |
69.85
x 100.2 |
Weight
(g, max) |
97
|
Environmental (operating) |
Ambient temperature |
-30° to 85° C |
Altitude (m) |
-300
to 5,000 |
Shock
(half-sine wave) |
300G
(2ms) |
Vibration (5 to 500 Hz) |
Up to
3G (10-500Hz) |
Environmental (non-operating)
|
Ambient temperature |
-40° to 95° C |
Altitude (m) |
-300
to 15,000 |
Shock
(half-sine wave) |
800G
(1ms) |
Vibration (5 to 500 Hz) |
Up to
5G (10-500Hz) |