nomen est omen#

basics#

todo: sas topology

• connector: physical connector to plug in cables
• controller: generic term for both hba’s and raid adapters
• hba: host bus adapter, sas controller to allow direct access to disks
• sas:
• sff-8482: most common connector to connect to sas disks
• port: collection of phy’s
• phy: part of sas assembly that creates the physical link

the whole shebang#

todo - lots to add

• sas speeds

  • sas-1: 3gb/s
  • sas-2: 6gb/s
  • sas-3: 12g/s
  • sas-4: 22.5gb/s

• tri mode card

• sas address

• controller

• hba

• jbod

• raid

• narrow port: port that is connected using only 1 phy

• wide port

• sas expander

  • sas edge expander (connects 128 devices)
  • sas fanout expander (connects 128 edge expanders) - 1 per sas domain

• sas domain max 16384 sas ports / addresses

• connector: physical connector to plug in cables

  • connector assembly
  • connector mechanical

• phy

• lane: only used in pcie context; not sas context