HP Xw460c - ProLiant - Blade Workstation Overview - Page 19

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in the HP BladeSystem Onboard Administrator User Guide available at this website:

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00705292/c00705292.pdf

c7000 bay-to-bay crosslinks

Four-trace SerDes signals between adjacent bays in the c7000 midplane permit horizontal bay-to-bay

communications.

Device bay crosslinks are wired between adjacent device bay pairs as indicated by the arrows in the

c7000 enclosure front view (Figure 11). For half-height server blades, these signals are used for four-

lane PCIe connection to a partner blade such as a tape blade or PCI expansion blade. The two

blades always occupy a pair of slots. If the server blade is installed in an odd-numbered bay, the

partner blade is installed in the adjacent even-numbered bay to the right. If the server blade is

installed in an even-numbered bay, the partner blade is installed in the adjacent odd-numbered bay to

the left. For full-height server blades, these signals are used for PCIe connection to a partner blade in

the lower adjacent bay and require a PCIe pass-thru mezzanine card installed in mezzanine

connector 3. The server blade is installed in an odd-numbered bay. The partner blade is installed in

the adjacent even-numbered bay to the right and is always located on the lower row of the enclosure

in slot 10, 12, 14, or 16. The BladeSystem Onboard Administrator disables the device bay crosslinks

in instances where they cannot be used, such as two server blades residing in adjacent device bays.

Figure 11. HP BladeSystem c7000 device bay crosslinks as indicated by the arrows

Interconnect bay crosslinks are wired between adjacent interconnect bay pairs as indicated by the

arrows on rear view of the c7000 enclosure in Figure 12. Crosslink signals can be enabled to

provide module-to-module connections (such as Ethernet crosslink ports between matching switches),

or they can be used by Virtual Connect modules as stacking links. The BladeSystem Onboard

Administrator disables the interconnect bay crosslinks in instances where they cannot be used, such as

two different modules residing in adjacent horizontal interconnect bays.