Power Consumption Efficiency; Reliability; Data Reliability; Failure Prediction (S.m.a.r.t.) - Hitachi IC25N040ATMR04-0 - Travelstar 40GB Laptop Hard Drive 9.5mm 2.5 Inch Notebook HDD Specifications

Watts (RMS typical)
Average from power on to ready
Footnotes:
1
The maximum fixed disk ripple is measured at the 5 volt input of the drive.
2
The disk drive shall not incur damage for an over voltage condition of +25% (maximum duration of
20 ms) on the 5 volt nominal supply.
3
The idle current is specified at an inner track.
4
The read/write current is specified based on three operations of 63 sector read/write per 100 ms.
5
The seek average current is specified based on three operations per 100 ms.
6
The worst case operating current includes motor surge.

6.2.1 Power consumption efficiency

Table 16: Power consumption efficiency

Power Consumption
Capacity
Efficiency (Watts/GB)
80GB
60GB
40GB
30GB
20GB
Note: Power consumption efficiency is calculated as Power Consumption of Low Power Idle in Watts/Capacity
(GB).

6.3 Reliability

6.3.1 Data Reliability

• Probability of not recovering data is 1 in 10
• ECC implementation
On-the-fly correction performed as a part of read channel function recovers up to 20 symbols of error in one sector
(1 symbol is 8 bits).

6.3.2 Failure prediction (S.M.A.R.T.)

The drive supports Self-monitoring, analysis and reporting technology (S.M.A.R.T.) function. The details are
described in Section 11.8, "S.M.A.R.T. Function" on page 77 and Section 13.38, "S.M.A.R.T. Function Set (B0h)"
on page 161.

6.3.3 Cable noise interference

To avoid any degradation of performance throughput or error when the interface cable is routed on top or comes in
80GB, 60GB models
0.008
0.011
0.016
0.022
0.033
Travelstar 80GN Hard Disk Drive Specification
40GB, 30GB 20GB
models
3.3
13
bits read
28
3.3