17-1
C H A PT E R
17
Crossbar Unit Replacement
This chapter explains the replacement procedure for crossbar units (XBUs). It covers the
following:
■
Section 17.1, “Overview of XBUs” on page 17-1
■
Section 17.2, “Cold Replacement” on page 17-4
As a replacement method for XBUs, only the cold replacement method can be used. For the
definition of the replacement method, see
Section 4.1, “Types of Replacement Procedures”
17.1
Overview of XBUs
This section provides an overview of XBUs and describes their mounting locations.
XBUs are mounted only in the M9000 server. XBUs logically switch between connections to
CPU/memory board unit (CMU) and I/O units (IOUs). Active maintenance cannot be
performed on XBUs even during degraded operation involving the XBUs.
and
show the mounting locations of XBUs in the cabinets of the
M9000 server (base cabinet), and M9000 server (with the expansion cabinet), respectively.
Summary of Contents for SPARC Enterprise M8000
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Page 15: ...Contents xv Index Index 1 ...
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Page 27: ...Chapter 1 Safety and Tools 1 5 M9000 Server Front View ...
Page 29: ...Chapter 1 Safety and Tools 1 7 Power Supply Unit PSU ...
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Page 205: ...Chapter 7 I O Unit IOU Replacement 7 13 FIGURE 7 8 Removing the IOU Front of M9000 1 1 2 3 ...
Page 227: ...Chapter 8 FAN Unit Replacement 8 11 FIGURE 8 9 Removing the FAN Unit Rear of M8000 1 2 ...
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Page 409: ...Chapter 20 Backplane Replacement 20 29 FIGURE 20 16 Removing the FANBP Rear of the M8000 ...
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Page 439: ...Chapter 23 Switch Backplane Replacement 23 7 FIGURE 23 4 Removing the SWBP Rear of the M8000 ...
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