
46 DS8800 Performance Monitoring and Tuning
Figure 2-14 DA performances for 4K random workloads
2.5 Host adapters
The DS8800 supports two types of host adapters (HAs): Fibre Channel/FICON 4-port and
8-port HA cards with a nominal port speed of 8 Gbps. HAs are installed in I/O enclosures.
There is no affinity between the HA and the processor complex. Either processor complex
can access any HA.
2.5.1 Fibre Channel and FICON host adapters
Fibre Channel (FC) is a technology standard that allows data to be transferred from one node
to another node at high speeds and great distances. Using the long-wave fibre port HAs,
connections are possible up to ...