
Connectors .........................27
Back Connectors (Model D40)..................27
Internal Connections (Model D40) ................28
Back Connectors (Model T40)..................29
Internal Connections (Model T40) ................30
SSA Connectors ......................31
Mainline-Power Connector (Model D40, 220 V ac/dc) ..........32
Mainline-Power Connector (Model D40, −48Vdc)...........32
Mainline-Power Connector (Model T40)...............33
Internal Power Connector (Model T40) ...............33
Remote-Power-On Control Unit Connectors and Switch .........34
Power Distribution Schematic ...................35
Labels ..........................36
Product Characteristics .....................38
Dimensions and Weight (Model D40) ...............38
Dimensions and Weight (Model T40) ...............38
AC and DC Input-Voltage Requirements ..............38
Environment .......................38
Altitude .........................40
Heat Output (Maximum)....................40
Sizes of Disk Drive Modules ..................40
Power Sequencing ......................41
Disk Drive Acclimation .....................41
SSA Bypass Cards ......................41
Automatic Mode ......................42
Forced Inline Mode .....................43
Forced Bypass Mode.....................44
Forced Open Mode .....................44
Resetting Bypass Card Modes .................44
Bypass Card Jumpers ....................45
SSA Subsystem Configurations ..................47
Rules for SSA Loops .....................47
Cable Configurations .....................47
Larger Configurations ....................49
SSA Cables for 7133 Models D40 and T40 .............56
Preventing the Isolation of Disk Drives in Higher-Availability Configurations ....57
Physical Location of a Device ...................59
Finding the Device When Service Aids Are Available ..........59
Additional Device Location Information ...............59
Controller Card Microcode Maintenance ...............60
Disk Drive Microcode Maintenance .................60
Vital Product Data (VPD) ....................61
SSA Disk Drives ......................61
7133 Models D40 and T40 ...................61
Service Functions .......................62
7133 Models D40 and T40 Service Aids ..............62
Service Inspection Guide ....................64
Inspection Checklist .....................64
Checking the Grounding of the 7133 ................65
Grounding Check (Model D40) .................65
iv 7133 Models D40 and T40 Service Guide