Table of Contents
Advertisement
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 DS4200 Express RAID controller has two single-ported host channel
connections 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:
CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber optic devices, or
transmitters) are installed, note the following:
v Do not remove the covers. Removing the covers of the laser product could
v Use of controls or adjustments or performance of procedures other than
DANGER
Handling fiber-optic cables
Attention:
v Do not route the cable along a folding cable-management arm.
v For devices on slide rails, leave enough slack in the cables so they do not bend
v Route the cable away from places where it can be damaged by other devices in
v Do not use plastic cable ties in place of the provided cable straps.
44
IBM System Storage DS4200 Express Storage Subsystem: Installation, User's and Maintenance Guide
result in exposure to hazardous laser radiation. There are no serviceable
parts inside the device.
those specified herein might result in hazardous radiation exposure.
Some laser products contain an embedded Class 3A or Class 3B laser
diode. Note the following.
Laser radiation when open. Do not stare into the beam, do not view directly
with optical instruments, and avoid direct exposure to the beam.
To avoid damage to your fiber-optic cables, follow these guidelines:
to a diameter of less than 76 mm (3 in.), or a radius less than 38 mm (1.5 in.),
when extended or become pinched when retracted.
the rack cabinet.
Advertisement
Table of Contents
