IBM DJSA-210 Hard Drive Specifications - Page 5

Table of contents List of 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 by model number 11 4.3 Data sheet 12 4.4 Cylinder allocation by model number 12 4.5 Performance characteristics 13 4.5.1 Command overhead 13 4.5.2 Mechanical positioning 14 4.5.3 Operating modes 16 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 Magnetic fields 24 6.2 DC power requirements 25 6.2.1 Energy consumption efficiency 26 6.3 Startup 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 29 6.4.5 Preventive maintenance 29 6.4.6 Load/unload 29 Travelstar 32GH/30GT/20GN hard disk drive specifications v