IBM IC25N020ATDA04 Hard Drive Specifications - Page 5

Table of contents Figures ix 1.0 Introduction 1 1.1 Abbreviations 1 1.2 References 3 1.3 General caution 3 1.4 Drive handling precautions 4 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 Default logical drive parameters 11 4.2 Formatted capacity 11 4.3 Data sheet 12 4.4 Cylinder Allocation 13 4.5 Performance characteristics 16 4.5.1 Command overhead 16 4.5.2 Mechanical positioning 17 4.5.3 Operating modes 19 5.0 Data integrity 21 5.1 Data loss on power off 21 5.2 Write Cache 21 5.3 Equipment status 21 5.4 WRITE safety 22 5.5 Data buffer test 22 5.6 Error recovery 22 5.7 Automatic reallocation 22 5.7.1 Nonrecovered write errors 22 5.7.2 Nonrecoverable read error 22 5.7.3 Recovered read errors 22 5.8 ECC 23 6.0 Specification 25 6.1 Environment 25 6.1.1 Temperature and humidity 25 6.1.2 Magnetic fields 26 6.2 DC power requirements 27 6.2.1 Power consumption efficiency 28 6.3 Start up Current 29 6.4 Reliability 31 6.4.1 Data reliability 31 6.4.2 Failure prediction (S.M.A.R.T 31 6.4.3 Cable noise interference 31 6.4.4 Service life and usage condition 31 6.4.5 Preventive maintenance 32 Travelstar 48GH, 30GN & 15GN hard disk drive specifications iii