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20 IBM Certification Study Guide AIX HACMP
1
See 2.3.1.3, “Rules for SSA Loops” on page 20 for more information.
The following rules apply to SSA Adapters:
• You cannot have more than four adapters in a single system.
• The MCA SSA 4-Port RAID Adapter (FC 6217) and PCI SSA 4-Port RAID
Adapter (FC 6218) are not useful for HACMP, because only one can be in
a loop.
• Only the PCI Multi Initiator/RAID Adapter (FC 6215) and the MCA Multi
Initiator/RAID EL Adapter (FC 6219) support target mode SSA (for more
information about target mode SSA see 3.2.2, “Non TCP/IP Networks” on
page 63).
2.3.1.3 Rules for SSA Loops
The following rules must be followed when configuring and connecting SSA
loops:
• Each SSA loop must be connected to a valid pair of connectors on the
SSA adapter (that is, either Connectors A1 and A2, or Connectors B1 and
B2).
• Only one of the two pairs of connectors on an adapter card can be
connected in a single SSA loop.
• A maximum of 48 devices can be connected in a single SSA loop.
• A maximum of two adapters can be connected in a particular loop if one
adapter is an SSA 4-Port adapter, Feature 6214.
• A maximum of eight adapters can be connected in a particular loop if all
the adapters are Enhanced SSA 4-Port Adapters, Feature 6216.
• A maximum of two SSA adapters, both connected in the same SSA loop,
can be installed in the same system.
For SSA loops that include an SSA Four-Port RAID adapter (Feature 6217) or
a PCI SSA Four-Port RAID adapter (Feature 6218), the following rules apply:
• Each SSA loop must be connected to a valid pair of connectors on the
SSA adapter (that is, either Connectors A1 and A2, or Connectors B1 and
B2).
6219 4-M MCA Enhanced RAID-5 8
1
5
Feature Code Adapter
Label
Bus Adapter Description Number of
Adapters per
Loop
Hardware
Raid Types