IBM DDRS-39130 - Ultrastar 9.1 GB Hard Drive

Contents
1.0 General ...................................................... 1
1.1 Introduction ................................................... 1
1.2 References .................................................... 1
1.3 Glossary ..................................................... 2
1.4 General Caution ................................................ 2
1.0 Outline of the drive ............................................... 3
Part 1. Functional Specification ....................................... 5
2.0 Fixed Disk Subsystem Description ....................................... 7
2.1 Control Electronics ............................................... 7
2.2 Head Disk Assembly .............................................. 7
2.3 Actuator ..................................................... 7
3.0 Drive Characteristics ..............................................
9
3.1 Formatted Capacity ...............................................
9
3.2 Data Sheet ....................................................
9
3.3 Cylinder Allocation ..............................................
10
3.4 Performance Characteristics .........................................
10
3.4.1 Command overhead ...........................................
11
3.4.2 Mechanical Positioning .........................................
11
3.4.3 Drive Ready Time ............................................
13
3.4.4 Spindle Stop Time ............................................
13
3.4.5 Data Transfer Speed ...........................................
13
3.4.6 Buffering Operation (Lookahead/Write Cache) ...........................
14
3.4.7 Throughput ................................................
15
4.0 Data integrity .................................................
17
4.1 Equipment Status ...............................................
17
4.2 Error Recovery ................................................ 17
5.0 Physical Format ................................................ 19
5.1 Shipped Format (PList) ........................................... 19
5.2 Reassigned Format (GList) ......................................... 19
6.0 Specification ..................................................
21
6.1 Electrical Interface Specification ......................................
21
6.1.1 Connectors ................................................
21
6.1.2 SCSI Cable ................................................
27
6.1.3 SCSI Bus Terminator ..........................................
27
6.1.4 Hot Plug / Unplug ............................................
27
6.1.5 SCSI Bus Electrical Characteristics .................................. 28
6.1.6 Auxiliary Connector on 68-pin Model ................................. 29
6.2 Option Jumper Block ............................................. 30
6.2.1 Jumper Signal Description .......................................
32
6.2.2 Shipping Default .............................................
35
6.3 LED Circuit ..................................................
36
6.3.1 50-Pin Model ...............................................
36
6.3.2 68-Pin Model ...............................................
37
 Copyright IBM Corp. 1997 iii