IBM DS4700 manual Fibre-channel loop and ID settings, Working with SFPs and fiber-optic cables

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ds470005

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Figure 32. Storage subsystem seven-segment enclosure ID on models 70 and 72

Table 22. Description of Figure 32

Number

1

Description

Enclosure ID

Fibre-channel loop and ID settings

When you install a hard disk drive in the storage subsystem, the drive tray plugs into a printed circuit board called the midplane. The midplane sets the fibre-channel loop ID automatically, based on the enclosure ID switch setting and the physical location (bay) of the hard disk drive.

Working with SFPs and fiber-optic cables

Each RAID controller has up to four single-ported host channel connections (depending on the model) and two dual-ported drive channel connections. You use a small-form factor pluggable transceiver (SFP) to connect each host channel port and drive channel port to hosts and storage expansion enclosures. The SFP is inserted into the port, and then a fiber-optic cable is inserted into the SFP. The other end of the fiber-optic cable connects to an external device. SFPs are laser products.

Statement 3:

56IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide