SunMD PDU/CDU locations

Asset ID:	1-71-1400752.1
Update Date:	2012-02-07
Keywords:

Solution Type Technical Instruction Sure

Solution 1400752.1 : SunMD PDU/CDU locations

Applies to:

Sun Modular Datacenter D20 - Version: Not Applicable and later [Release: N/A and later ]
Sun Modular Datacenter S20 - Version: Not Applicable and later [Release: N/A and later]
Information in this document applies to any platform.

Goal

Understanding the nomenclature used in identifying PDUs within a rack, and physically locating a PDU based on its IP adderss or fault message.

Solution

The SunMD racks employ a modular power distribution system with smart Power Distribution Units or PDUs, which plug into the IEC 60309 outlets which hang above carrel where each rack is normally parked, and CDUs or Cabinet Distribution Units which plug into rack's PDUs and provide IEC 60320 power outlets for equipment installed within each rack.

Each CDU has six IEC 60320-C13 outlets and two IEC 60320-C19 outlets.

Every SunMD rack has 1 PDU from panel A with 3 CDUs, 1 PDU from panel B with 3 CDUs.

A high-power X-Option or upgrade adds 1 slave PDU from panel A with 2 CDUs, 1 slave PDU from panel B with 2 CDUs.

High-power describes the number of PDUs and CDUs, and should not be confused with high-voltage which describes the external power feeds to the SunMD.

Slave PDUs have their own power cord which plugs into an IEC 60309 outlet above the rack carrel, but have no IP address. The master PDUs have the IP address and serial console port. The slave PDUs communicate with their master PDU with a proprietary communications link.

Master PDU IP scheme:
10.10.10.XY (Default is: 192.168.1.254)
X=1 PDU is fed from breaker panel A
X=2 PDU is fed from breaker panel B
Y=rack number (1-8)

IMS /etc/hosts entries:

#
# Primary PDU's
#
10.10.10.11    rack1p
10.10.10.12    rack2p
10.10.10.13    rack3p
10.10.10.14    rack4p
10.10.10.15    rack5p
10.10.10.16    rack6p
10.10.10.17    rack7p
10.10.10.18    rack8p
#
# Secondary PDU's
#
10.10.10.21    rack1s
10.10.10.22    rack2s
10.10.10.23    rack3s
10.10.10.24    rack4s
10.10.10.25    rack5s
10.10.10.26    rack6s
10.10.10.27    rack7s
10.10.10.28    rack8s
#

Primary and Secondary refer to the AC breaker panels at the rear of the SunMD, and should not be confused with master and slave PDUs.

Every rack has one Primary and one Secondary PDU. With the high-power option, every rack with the exception of rack1 also has a Primary slave PDU and a Secondary slave PDU.

The Primary PDUs plug into IEC 60309 outlets fed from AC breaker panel A at the rear of the SunMD, Secondary PDUs plug into outlets fed from AC breaker panel B. Each IEC 60309 outlet has its own circuit breaker in either AC breaker panel A or B.

The master PDUs are the ones toward the top of the rack, and are designated TowerA.
The slave PDUs are optional, and if installed are the ones towards the bottom of the rack, designated TowerB.

Rack 1 only has the two master PDUs, one from breaker panel A and one from breaker panel B.

Example:

All PDUs in Rack 1 fail (only 2 PDUs in Rack 1, one from panel A, one from panel B)

rack1p EVENT: Tower "TowerA" [A] detected a status error -- reason = Fan Fail
rack1s EVENT: Tower "TowerA" [A] detected a status error -- reason = Fan Fail

Master and slave PDUs from panel A in Rack 2 fail (4 PDUs total in this rack)

rack2p EVENT: Tower "TowerA" [A] detected a status error -- reason = Fan Fail
rack2p EVENT: Tower "TowerB" [B] detected a status error -- reason = Fan Fail

All 4 PDUs in Rack 3 fail (master and slave from panel A, master and slave from panel B)

rack3p EVENT: Tower "TowerA" [A] detected a status error -- reason = Fan Fail
rack3p EVENT: Tower "TowerB" [B] detected a status error -- reason = Fan Fail
rack3s EVENT: Tower "TowerA" [A] detected a status error -- reason = Fan Fail
rack3s EVENT: Tower "TowerB" [B] detected a status error -- reason = Fan Fail

The p PDUs are the ones fed from breaker panel A, s PDUs are fed from breaker panel B.

The p = Primary = panel A PDUs are on the container wall side of the rack. The s = Secondary = anel B PDUs are on the aisle side of the rack.

The TowerA PDUs are the Master PDUs which have the Ethernet and serial port connections. The TowerA PDUs are located in the top half of each rack. The TowerB PDUs are the Slave PDUs (available with the high-power option) and are located in the bottom half of the payload racks 2-8. Rack 1 has only the two Master aka TowerA PDUs.

Examples:

rack2p EVENT: Tower "TowerB" [B] detected a status error -- reason = Fan Fail
Indicates a problem with the slave (TowerB) PDU in rack2 which is fed from AC breaker panel A (p = primary = panel A). It is physically located on the container wall side of rack2, in the bottom half of the rack.

rack3s EVENT: Tower "TowerA" [A] detected a status error -- reason = Fan Fail
Indicates a problem with the master (TowerA) PDU in rack3 which is fed from AC breaker panel B (s = secondary = panel B). It is physically located on the aisle side of rack3, in the top half of the rack.

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