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Learning Ceph - Second Edition by Karan Singh, Vaibhav Bhembre, Anthony D'Atri

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Compatibility with physical infrastructure

Decades ago, computers were large and standards were few; each might demand a dedicated room with unique physical requirements. These days, we enjoy considerable benefits from standards and convergent designs, yet there can still be surprises. Just within the preceding five years this author has encountered the following:

  • Serial console infrastructure defaulting to 9,600 bps but equipment defaulting to 19,200 bps
  • Atypical DTE/DCE pinouts incompatible with common RJ45 adapters
  • Gear that still uses 1990s-style DB9 connectors or even an audio-type 3.5mm round jack for management access
  • One server model out of a larger product line with an unusual onboard network interface whose PXE code for network ...

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