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HP Cluster Platform Interconnects v2010 Myrinet System Interconnect Guide - Page 32

Replacing a fan tray, Removing a Fan Tray, Fan Tray Handle, Locking Screw

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Note Do not operate a Myrinet interconnect for extended periods with missing line cards. Use blank panels to fill in any empty line card slots. The front of the enclosure needs to be closed both for the efficiency of the fan cooling and to avoid electromagnetic interference (EMI). 5.3 Replacing a fan tray The fan tray is hot swappable and monitored via the line monitor card. You can identify it by its large handle, located on the right side of the Myrinet system interconnect (Figure 5-5). Remove it by loosening the two locking screws and pulling on the handle. Figure 5-5: Removing a Fan Tray Locking Screw Fan Tray Handle Locking Screw Important When a fan tray is hot swapped, it must be replaced within two minutes. Otherwise, the line cards might power themselves off in response to an over-temperature condition. Each line card has thermal sensors to detect over-temperature conditions. The fan tray actually holds eight small fans (Figure 5-6). 5-4 Replacing components

Section	Page
Table of Contents	1
Audience	5
Organization	5
Additional documentation	5
Providing feedback	5
Symbols in text	6
Myrinet interconnect overview	7
1.1 Interconnect characteristics	7
Figure 1-1: Fat Tree Topology	7
1.2 Backplane and chassis types	8
Figure 1-2: Myrinet System Interconnect Backplane	8
Figure 1-3: Federated Configuration Switches	8
Figure 1-4: Nonfederated Configuration Switch	9
Figure 1-5: 128-Port Myrinet System Interconnect	10
1.3 Wiring rules	10
Figure 1-6: Fully Populated 128-Port Myrinet System Interconnect	11
PCI cards	13
2.1 General characteristics	13
Figure 2-1: PCI Identification Label	13
2.2 Single-port XP PCI card	14
Figure 2-2: Single-port XP PCI Rev. D card	14
2.3 Dual-port 2XP PCI	15
Figure 2-3: Myricom 2XP PCI Rev. E card	16
2.4 Single-port 2XP PCI	17
Figure 2-4: Myricom 2XP PCI Rev. F card	18
Switch, spine and monitoring line cards	19
3.1 Switch card	19
Figure 3-1: Myrinet system Interconnect 8-port switch card	19
Figure 3-2: External features of the Myrinet system interconnect	19
Figure 3-3: Myrinet system interconnect 8-Port GigE switch card	20
Figure 3-4: Block Diagram of the gigabit ethernet switch card	21
3.2 Spine card	21
Figure 3-5: Spine Card Block Diagram	22
3.3 Monitoring line card	22
Figure 3-6: Monitoring Line Card	23
Figure 3-7: External Features of the Monitoring Line Card	23
LED indications and diagnostics	25
4.1 Line card and PCI LEDs	25
4.2 Using LEDs for diagnostics	25
4.3 Using the monitoring line card for diagnostics	26
Replacing components	29
5.1 Installing a monitoring line card	29
5.2 Removing and installing an 8-port line card	30
Figure 5-1: Unlocking Switch Card Handles	30
Figure 5-2: Ejecting a Switch Card	31
Figure 5-3: Sliding a Switch Card	31
Figure 5-4: Backplane Power Connector	31
5.3 Replacing a fan tray	32
Figure 5-5: Removing a Fan Tray	32
5.4 Replacing an interconnect chassis	33
Powering up procedure	39