Cray T3E Manuel utilisateur

HMM-369-0 Cray Research Proprietary 1

CRAY T3E AC Multiple-cabinet Installation

HMM-369-0

Record of Revision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Hazard Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

ESD Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

ESD Smock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Wrist Strap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Preinstallation Activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Checking Site Planning Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Checking the Power Cord Receptacles . . . . . . . . . . . . . . . . . . . . . . . . . 14

Power Wiring for High-leakage Current . . . . . . . . . . . . . . . . . . . . . . . . 16

Unloading the Computer System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Inspecting the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Opening the “OPEN FIRST” Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Transporting the Mainframe to the Designated Location . . . . . . . . . . . . . . 20

Shipping Speciﬁcations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Unpacking the CRAY T3E AC Cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Unpacking a Crate that Contains a Single Cabinet . . . . . . . . . . . . . . . . 22

Unpacking a Crate that Contains Two or Three Cabinets . . . . . . . . . . . 30

Unpacking and Positioning the PC-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Unpacking and Positioning the System Workstation (SWS) . . . . . . . . . . . . 37

Unpacking and Positioning Additional System Components . . . . . . . . . . . 37

(continued)

CRAY T3E AC Multiple-cabinet Installation

2 CrayResearchProprietary HMM-369-0

Complete the following tasks when you bolt cabinets together:

Joining Two or More CRAY T3E AC Cabinets . . . . . . . . . . . . . . . . . . . . . . 38

Preparing the CRAY T3E Cabinets for Internal Wiring . . . . . . . . . . . . 38

Positioning Cabinets Temporarily When No Cabinets Are

Prejoined . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Positioning Cabinets Temporarily When Some Cabinets Are

Prejoined . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Removing Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Removing the Blower Exhaust Shields . . . . . . . . . . . . . . . . . . . . . . 47

Removing Access Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Removing Wire-duct Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Removing the Side Trim and Logic Panels (Optional) . . . . . . . . . . 51

Attaching Cable Troughs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Joining the Cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Opening the Cable Ducts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Grounding the Mainframe Chassis . . . . . . . . . . . . . . . . . . . . . . . . . 58

Removing Clock and Logic Modules . . . . . . . . . . . . . . . . . . . . . . . 59

Preparing the Rails for Wire Insertion . . . . . . . . . . . . . . . . . . . . . . . 62

Removing Slot Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Removing Rail Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Removing Connector Pin Locks . . . . . . . . . . . . . . . . . . . . . . . . 66

Completing the Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Completing the Clock Connections . . . . . . . . . . . . . . . . . . . . . . . . . 67

Completing the Boundary Scan Connections . . . . . . . . . . . . . . . . . 74

Connecting the Point-to-point Wires – 4 or More Cabinets . . . 75

Connecting 4-pin Edge-to-Pigtail Cables – P/N 15237701 . . . . 77

Connecting the Daisy Chain . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Connecting Scan Chain 0 to the Scan Master . . . . . . . . . . . . . . 82

Connecting Scan Chain 1 to the Scan Master . . . . . . . . . . . . . . 84

Reinstalling the Connectors in the Top Clock Rail . . . . . . . . . . . . . 88

Completing the Torus Interconnect Network Connections . . . . . . . 90

Closing the Cable Ducts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Installing Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Installing Side Access Panels and Trim . . . . . . . . . . . . . . . . . . . . . . . . . 95

CRAY T3E AC Multiple-cabinet Installation

HMM-369-0 Cray Research Proprietary 3

Complete the following tasks when you DO NOT bolt cabinets together:

Positioning Cabinets (for Prejoined Cabinets) . . . . . . . . . . . . . . . . . . . . . . . 97

Grounding the Mainframe Chassis (for Prejoined Cabinets) . . . . . . . . . . . . 100

Installing the Cabinet Side Panels (for Prejoined Cabinets) . . . . . . . . . . . . 101

Complete the following tasks for ALL cabinets:

Verifying the CRAY T3E AC Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Verifying the Voltage Selector Switch . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Connecting the Optional Customer Alarm . . . . . . . . . . . . . . . . . . . . . . 105

Verifying the Control System Hardware . . . . . . . . . . . . . . . . . . . . . . . . 108

Verifying Additional Power Hardware . . . . . . . . . . . . . . . . . . . . . . . . . 110

Verifying that the Modules Are Seated and Cammed . . . . . . . . . . . . . . 111

Completing the System Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Cable Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Connecting the WACS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Connecting the GigaRing Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Verifying System Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Powering Up the System Workstation (SWS) . . . . . . . . . . . . . . . . . . . . . . . 119

Powering Up the PC-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Connecting the Input Power to the CRAY T3E Cabinets . . . . . . . . . . . . . . 119

Verifying Cabinet Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Verifying WACS Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Verifying Operation of the Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Verifying Operation of the Thermistors . . . . . . . . . . . . . . . . . . . . . . . . . 121

Verifying Cabinet Power Switch and Shunt Trip Operation . . . . . . . . . 121

Verifying Remote Alarm Operation (Optional) . . . . . . . . . . . . . . . . . . . 122

Powering Up the Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Verifying Remote Power On/Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Running Boundary Scan and Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . 124

Installing Panels and Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Installing Rear Access Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Installing the Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Appendix – Wire Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

CRAY T3E AC Multiple-cabinet Installation
4 CrayResearchProprietary HMM-369-0
Figures
Figure 1. Power Plugs and Receptacles . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 2. Single-cabinet Shipping Conﬁguration . . . . . . . . . . . . . . . . . . 18
Figure 3. Three-cabinet Shipping Conﬁguration . . . . . . . . . . . . . . . . . . 19
Figure 4. Cabinet Shipping Crate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 5. Retaining Block and Screws . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 6. Installing the Ramp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 7. Cardboard Shipping Container . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 8. Removing the Inside Retaining Bar . . . . . . . . . . . . . . . . . . . . 27
Figure 9. Shipping Bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 10. Remove the Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 11. Remove the Bumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 12. Place the Blocks beneath the Corner Levelers . . . . . . . . . . . . 32
Figure 13. Lower the Cabinets onto the Blocks and Remove the Lifts . . 32
Figure 14. Remove the Straps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 15. Remove the Cardboard Lid and Panels . . . . . . . . . . . . . . . . . . 33
Figure 16. Remove the Four Shipping Bolts . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 17. Remove the Pallet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 18. Remove the Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 19. Lower the Cabinets to the Floor . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 20. CRAY T3E AC Cabinet Layout . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 21. Door Latches and Handle (Front Door) . . . . . . . . . . . . . . . . . . 39
Figure 22. Cabinet Floor Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 23. Temporary Cabinet Positions . . . . . . . . . . . . . . . . . . . . . . . . . 41
Figure 24. CRAY T3E AC Cabinet Layout . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 25. Door Latches and Handle (Front Door) . . . . . . . . . . . . . . . . . . 43
Figure 26. Cabinet Floor Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 27. Temporary Cabinet Positions for Prejoined Cabinets . . . . . . . 45
Figure 28. Access Panel Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 29. Frame-bolt Holes and Wire-duct Locations . . . . . . . . . . . . . . 50
Figure 30. Cable Troughs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

CRAY T3E AC Multiple-cabinet Installation

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Figure 31. Six-cabinet System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Figure 32. Frame-joiner Bolt Locations . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Figure 33. Frame-joiner Bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Figure 34. Intercabinet Cable Duct Locations . . . . . . . . . . . . . . . . . . . . . 56

Figure 35. Intercabinet Cable Duct (as viewed from inside cabinet) . . . . 57

Figure 36. Chassis Ground Connections (Rear View of Cabinet) . . . . . . 58

Figure 37. Module Camming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Figure 38. Module Setscrew Locations (Rear View of Cabinet) . . . . . . . 61

Figure 39. Removing Plugs from the Top Clock Rail . . . . . . . . . . . . . . . . 62

Figure 40. Loosening the Wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Figure 41. Clock Connector Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Figure 42. Removing Clock Rail Connectors . . . . . . . . . . . . . . . . . . . . . . 64

Figure 43. Connector Locations – Bottom Clock Rail . . . . . . . . . . . . . . . 65

Figure 44. Removing a Connector Spring . . . . . . . . . . . . . . . . . . . . . . . . 65

Figure 45. Removing a Connector Pin Lock . . . . . . . . . . . . . . . . . . . . . . 66

Figure 46. Example – Clock Wire Labels . . . . . . . . . . . . . . . . . . . . . . . . . 68

Figure 47. Clock Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Figure 48. System and GigaRing Clock Wire Connections . . . . . . . . . . . 69

Figure 49. Pin Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Figure 50. 2-pin Connector Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Figure 51. Wire Insertion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Figure 52. Wire Insertion with Wire Rod . . . . . . . . . . . . . . . . . . . . . . . . . 73

Figure 53. Edge-to-edge Connection – P/N 15224009 . . . . . . . . . . . . . . . 75

Figure 54. Edge-to-edge Connection – P/N 15223701 . . . . . . . . . . . . . . . 75

Figure 55. Direct Boundary Scan Connections . . . . . . . . . . . . . . . . . . . . . 76

Figure 56. 4-pin Edge-to-pigtail Connections . . . . . . . . . . . . . . . . . . . . . 78

Figure 57. 4-pin Edge-to-Pigtail Cable – P/N 15237701 . . . . . . . . . . . . . 79

Figure 58. TDOM > TDIM Daisy Chain Connection - Between Cabinets 80

Figure 59. Scan Jumper/Intermediate Connection – P/N 15223802 . . . . . 81

Figure 60. Connection – Scan Master to End of Daisy Chain –

Scan Chain 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Figure 61. 2-position Socket, Edge-to-Pigtail Cable – P/N 15237601 . . . 83

CRAY T3E AC Multiple-cabinet Installation

6 CrayResearchProprietary HMM-369-0

Figure 62. Boundary Scan Connections to Cabinet 3, Slot 1 . . . . . . . . . . 84

Figure 63. Scan Jumper/Intermediate Connection – P/N 15223802 . . . . . 85

Figure 64. 2-position Pin, Edge-to-Pigtail Cable – P/N 15237801 . . . . . . 86

Figure 65. 2-position Socket, Edge-to-Pigtail Cable – P/N 15237601 . . . 87

Figure 66. Inserting and Seating a Plastic Connector Pin Lock . . . . . . . . 88

Figure 67. Example of Torus Connections . . . . . . . . . . . . . . . . . . . . . . . . 90

Figure 68. Connectors P2 and P3 – Torus Cable Assembly . . . . . . . . . . . 91

Figure 69. Module Camming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Figure 70. Installing the Side Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Figure 71. CRAY T3E AC Cabinet Layout . . . . . . . . . . . . . . . . . . . . . . . 97

Figure 72. Door Latches and Handle (Front Door) . . . . . . . . . . . . . . . . . . 98

Figure 73. Cabinet Floor Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Figure 74. Chassis Ground Connections (Rear View of Cabinet) . . . . . . 100

Figure 75. Installing Side Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Figure 76. CRAY T3E Cabinet Components -- Front View . . . . . . . . . . . 103

Figure 77. Voltage Selector Switch (SW1) . . . . . . . . . . . . . . . . . . . . . . . . 104

Figure 78. Power-cord Cover and Power-box Cover (Removed) . . . . . . . 105

Figure 79. Filter Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Figure 80. Remote Alarm Contacts - Locations . . . . . . . . . . . . . . . . . . . . 107

Figure 81. WACS Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Figure 82. WACS with Front Panel Open . . . . . . . . . . . . . . . . . . . . . . . . . 109

Figure 83. Power Supply Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Figure 84. Module Setscrew Locations (Rear View of Cabinet) . . . . . . . 111

Figure 85. Typical System - Block Diagram . . . . . . . . . . . . . . . . . . . . . . . 112

Figure 86. WACS Connector Location on I/O Bulkhead . . . . . . . . . . . . . 114

Figure 87. I/O Bulkhead – Connector Locations . . . . . . . . . . . . . . . . . . . 115

Figure 88. Example GigaRing Connections . . . . . . . . . . . . . . . . . . . . . . . 116

Figure 89. GigaRing Connectors on PC-10 (Rear View) . . . . . . . . . . . . . 117

Figure 90. NSR-1 GigaRing Connectors . . . . . . . . . . . . . . . . . . . . . . . . . 118

Figure 91. MPN-1 GigaRing Connectors . . . . . . . . . . . . . . . . . . . . . . . . . 118

Figure 92. WACS Summary Screen - Standby Mode . . . . . . . . . . . . . . . . 120

CRAY T3E AC Multiple-cabinet Installation

HMM-369-0 Cray Research Proprietary 7

Figure 93. Power Supply Circuit Breakers and LEDs . . . . . . . . . . . . . . . 123

Figure 94. T3EMS Main Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Figure 95. T3EMS Scan Tool Options Window . . . . . . . . . . . . . . . . . . . . 126

Figure 96. Load Program Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Figure 97. PE Conﬁguration Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Figure 98. Access Panel Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Figure 99. Connector Removal with Mechanical Pencil . . . . . . . . . . . . . 133

Tables

Table 1. Required Power Receptacle Test Readings . . . . . . . . . . . . . . . 15

Table 2. Remote Alarm Contacts - Descriptions . . . . . . . . . . . . . . . . . . 107

Table 3. Bottom Scanner DIP Switch Functions . . . . . . . . . . . . . . . . . . 109

Table 4. Cable Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Table 5. Example Cable Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Table 6. CRAY T3E AC I/O Bulkhead GigaRing Connections . . . . . . 115

Table 7. Ofﬂine Diagnostic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Record of Revision CRAY T3E AC Multiple-cabinet Installation

8 CrayResearchProprietary HMM-369-0

Record of Revision

Revision 0: October 1996

Original printing.

Overview

These installation procedures are intended to assist Cray Research personnel

with the mechanical installation of 2 or more CRAY T3E air-cooled (AC)

cabinets. The installation includes the following tasks:

•Unpacking and positioning the system components

•Connecting cables

•Powering on the system and verifying operation

•Verifying system function with diagnostics

This document provides an efficient sequence for the installation. You may

deviate from the sequence as required; however, when possible, perform the

procedures in the order shown.

Cray Research ships CRAY T3E AC cabinets in three shipping conﬁgurations:

1 cabinet per shipping crate, 2 cabinets per crate, and 3 cabinets per crate. When

a crate contains 2 or 3 cabinets, the cabinets are bolted together and the wires

that pass between cabinets are connected.

As a result of these variable shipping configurations, you may not be required

to complete internal cabinet wiring. For example:

•If your system contains 2 or 3 cabinets, and the cabinets are bolted

together during shipment, then you do not need to complete internal

cabinet wiring.

•If your system contains 4 or more cabinets, or if you must otherwise bolt

cabinets together, then you must complete internal cabinet wiring.

Your system configuration and site access restrictions determine how your

system ships.

NOTE: This document uses the term prejoined to refer to cabinets that are

bolted together during shipment.

This document does not contain troubleshooting procedures, nor does it contain

installation procedures for peripheral equipment.

CRAY T3E AC Multiple-cabinet Installation Overview

HMM-369-0 Cray Research Proprietary 9

For information on the PC-10 installation, refer to Peripheral Cabinet (PC-10)

Installation, publication HMM-371. For information on the SWS installation,

refer to System Workstation, publication HMM-222.

For information on the CRAY T3E software installation, refer to the CRAY T3E

Software Installation and Conﬁguration Guide, publication SG-2610. For

information on a single-cabinet installation, refer to CRAY T3E AC

Single-cabinet Installation Procedures, HMM-164.

Installationpersonnel shouldhaveabasicknowledgeof computersystem power

processes. They should also have a basic understanding of the control system,

the layout of the various cabinet components, and of running ofﬂine diagnostics.

The installation coordinator is responsible for CRUISE (Cray Research Uniﬁed

System Enterprise) registration and for installation reporting. The system log

book in the “OPEN FIRST” box contains a copy of the Web-based Installation

Reporting tool. You may use the paper copy to help track the installation and,

if necessary, to fax the information.

Safety Information CRAY T3E AC Multiple-cabinet Installation

10 CrayResearchProprietary HMM-369-0

Safety Information

The following subsections contain important safety information that you must

read and understand before you begin the CRAY T3E AC system installation.

Hazard Statements

During the installation of the computer system, be alert for hazard advisory

statements. The following list describes the hazard statement signal words:

•Danger indicates an imminently hazardous situation that, if not avoided,

will result in death or serious injury.

•Warning indicates a potentially hazardous situation that, if not avoided,

could result in death or serious injury.

•Caution indicates a potentially hazardous situation that, if not avoided,

may result in minor or moderate injury. This signal word is also used to

alert personnel against unsafe practices that can result in equipment

damage and/or data corruption.

ESD Precautions

Observe electrostatic discharge (ESD) precautions during the entire installation

process. Required apparel includes an ESD smock and an ESD wrist strap.

ESD Smock

Wear a Cray Research-approved static-dissipative smock when servicing or

handling an ESD-sensitive device. Completely button the smock and wear it as

the outermost layer of clothing. You must have a portion of the smock’s sleeves

in direct contact with the skin of your arms. Skin contact is essential for a

dissipativepath-to-earth groundthrough yourwriststrap. Tuck hairthatexceeds

shoulder length inside the back of the smock.

CAUTION

Observe all ESD precautions. Failure to

do so could result in damage to the

equipment.

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