Hitachi IC25N040ATCS04-0 Specifications - Page 4

Table of contents Figures vii 1.0 General 1 1.1 Abbreviations 1 1.2 References 3 1.3 General caution 3 1.4 Drive handling precautions 3 2.0 General features 5 Part 1. Functional specification 7 3.0 Fixed disk subsystem description 9 3.1 Control Electronics 9 3.2 Head disk assembly data 9 4.0 Fixed disk characteristics 11 4.1 Formatted capacity by model number 11 4.2 Data sheet 12 4.3 Cylinder allocation by model number 12 4.4 Performance characteristics 14 4.4.1 Command overhead 14 4.4.2 Mechanical positioning 15 4.4.3 Operating modes 17 5.0 Data integrity 19 5.1 Data loss on power off 19 5.2 Write Cache 19 5.3 Equipment status 19 5.4 WRITE safety 20 5.5 Data buffer test 20 5.6 Error recovery 20 5.7 Automatic reallocation 20 5.7.1 Nonrecovered write errors 20 5.7.2 Nonrecoverable read error 20 5.7.3 Recovered read errors 20 5.8 ECC 21 6.0 Specification 23 6.1 Environment 23 6.1.1 Temperature and humidity 23 6.1.2 Radiation noise 24 6.1.3 Conductive noise 24 6.1.4 Magnetic fields 24 6.2 DC power requirements 25 6.2.1 Power consumption efficiency 26 6.3 Start up Current 26 6.4 Reliability 28 6.4.1 Data reliability 28 6.4.2 Failure prediction (S.M.A.R.T 28 6.4.3 Cable noise interference 28 6.4.4 Service life and usage condition 28 Hitachi Travelstar 60GH & 40GN hard disk drive specifications iii