SL8500 - PDU Failure. Which Components Remain Online when Power is Lost to One PDU?

Asset ID:	1-71-1527119.1
Update Date:	2017-10-03
Keywords:

Solution Type Technical Instruction Sure

Solution 1527119.1 : SL8500 - PDU Failure. Which Components Remain Online when Power is Lost to One PDU?

Applies to:

Sun StorageTek SL8500 Modular Library System - Version All Versions and later
Information in this document applies to any platform.

When there is total failure of one PDU or power to one side of a 2N configured SL8500, what components stay online and what go down?

Goal

Customer wants to know what he can expect to see when testing PDU (Power Distribution Unit) failure to one side of the SL8500.

When there is a total failure of one PDU or power to one side of a SL8500, what components stay online and what go down?

Solution

AC PDU1(29) (Staying up). The following components remain online ....
Drive DCPSs : 1,2,7,8,13,14,19,20 Rail DCPSs: 5,6,11,12 (all bots staying up (4 and 8 bot libraries)
Customer Interface Module: (Z, CAP etc) DCPS 25
Electronics Control Module: DCPS 27 (Bottom)
Customer Accessory Rack numbers 2 and 4 only
All PTPs
All internal lights work
Front Panel works

AC PDU2(30) (Staying up).The following components remain online ....
Drive DCPSs : 3,4,9,10,15,16,21,22 Rail DCPSs: 17,18,23,24 (all bots staying up (4 and 8 bot libraries))
Customer Interface Module: (Z, CAP etc) DCPS 26
Electronics Control Module: DCPS 28 (Top)
Customer Accessory Rack numbers 1 and 3 only
All PTPs
All internal lights work
Front Panel does *not* work.

This is the power arrangement for the power supplies and their associated AC units...

1,0,0,1,1     PS-1    Back-DEM (Bottom)      Drive-AC1
1,0,0,1,2 PS-2    Back-DEM                   Drive-AC1
1,0,0,1,3 PS-3    Back-DEM Drive-AC2N+1
1,0,0,1,4 PS-4    Back-DEM Drive-AC2N+1
1,0,0,1,5     PS-5    Back-DEM (Bottom)      Rail-AC1
1,0,0,1,6 PS-6    Back-DEM                   Rail-AC1
1,0,0,1,7     PS-7    Back-DEM                   Drive-AC1
1,0,0,1,8     PS-8    Back-DEM                   Drive-AC1
1,0,0,1,9 PS-9    Back-DEM                   Drive-AC2
1,0,0,1,10 PS-10 Back-DEM Drive-AC2
1,0,0,1,11 PS-11 Back-DEM                   Rail-AC1
1,0,0,1,12 PS-12 Back-DEM Rail-AC1
1,0,0,1,13 PS-13 Back-DEM Drive-AC1
1,0,0,1,14   PS-14   Back-DEM                   Drive-AC1
1,0,0,1,15 PS-15   Back-DEM Drive-AC2
1,0,0,1,16 PS-16   Back-DEM Drive-AC2
1,0,0,1,17 PS-17   Back-DEM                   Rail-AC2N+1
1,0,0,1,18 PS-18   Back-DEM                   Rail-AC2N+1
1,0,0,1,19 PS-19   Back-DEM                   Drive-AC1
1,0,0,1,20 PS-20   Back-DEM                   Drive-AC1
1,0,0,1,21   PS-21   Back-DEM             Drive-AC2
1,0,0,1,22   PS-22   Back-DEM (Top)           Drive-AC2
1,0,0,1,23   PS-23   Back-DEM                   Rail-AC2
1,0,0,1,24 PS-24   Back-DEM (Top)     Rail-AC2
1,0,0,1,25 PS-25   Front-CIM                   HBZ-25
1,0,0,1,26   PS-26   Front-CIM (Top)           HBZ-26
1,0,0,1,27   PS-27   Back-DEM (EM-Lower)   ECM-PS1-AC1
1,0,0,1,28 PS-28   Back-DEM (EM-Upper)   ECM-PS2-AC2
1,0,0,1,29 PS-29   Back-DEM                   PDU1-AC1
1,0,0,1,30   PS-30   Back-DEM                   PDU2-AC2

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