NEC NF2900-SR40E, User Manual

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5. Connection of the Disk Array Unit
A user may conduct the connection of the disk array unit described in this chapter. However, if
so, NEC does not assume the responsibility for any damage to the disk array unit and
components and any influence resulting from the operation of the disk array unit. NEC
recommends that you ask your Technical Engineer or service representative trained with expert
knowledge on the details of the disk array unit to install or remove the disk array unit.
This chapter describes the basic procedure for connecting the disk array unit to the host system. Before
proceeding, also read the User's Guide of the FC-AL switch, host system and host bus adapter to
which the disk array unit is connected.
CAUTION
Before connecting a peripheral device to the system, disconnect the power cord of the peripheral
from the AC outlet. If not, you may be electrically shocked.
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Any FC cable, DE cable, and CONT-DE cable used for the connection of the disk array unit
must be approved by NEC. Also, the length of the cable shall be within the specified range. If
a cable not approved by NEC is used or the length of the cable is out of the specified range,
data corruption could occur.
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To avoid mistakes, familiarize yourself with the cabling specifications before making
connections.
„
Do not force any cable connection. Each connector can be connected only when it is inserted
properly to the mating connector in the correct direction and at the correct angle. Proper
insertion allows the connector to be inserted to the mating connector smoothly without
excessive force. If the connector cannot be inserted smoothly, do not insert it by force but
check the alignment of the connector again.
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Make sure that cable damages such as buckling, dust adhesion, and dirt are not found on the
connector and contact before connection.
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Treat all connectors carefully so that they may not be dropped to the floor to be damaged. Do
not drag any connector on the floor as dust may adhere to the connector.
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Do not apply excessive force to any cabling connection. Do not step on or put any material on
a cable that might deform the cable.
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Handle optical fibers carefully and gently.
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The minimum bending radius of an optical fiber shall be 30 mm.
„
Dust and/or dirt may attenuate the optical power of an optical fiber and cause data errors to
occur. Clean any optical fiber cable before it is inserted into the mating connector using the
following procedure.
1. Blow a parts cleaning gas (e.g. compressed air) to the connector of the optical fiber cable
for several seconds.
2. Wipe the connector with a non-woven cloth
soaked with alcohol for several passes
3. Apply a parts cleaning gas to the connector again.
„
Since the DE cable has the possibility that a deterioration of its electrical quality and/or its
mechanical destruction (disconnection) may arise if it is handled
inappropriately, be careful of the following points:
1. Cabling lengths should have a safety margin in order to prevent excessive
stress to connectors and/or cables.
2. Never give cables a jerk or stress.
3. The cables should be kept with a curvature radius of 50mm or more.