Cisco LightStream 2020 Bedienungsanleitung PDF herunterladen (Seite 6)

6 LightStream 2020 Upgrade to Dual Power Cords

Upgrading Disk Assemblies

Step 2 Place the disk assembly on the nonconducting mat to protect it from damaging electrostatic

discharge.

Step 3 To remove the hard disk drive from the disk assembly, ﬁrst disconnect two connectors, JH-1

and DCHD (see Figure 4). They are located at the rear of the assembly near the top.

Step 4 Use the slot-tip screwdriver to unscrew and remove the two screws on each side of the

assembly (total 4 screws), as indicated in Figure 4. Each screw is accompanied by a washer.

♦ Note: In some assemblies, metal phillips screws hold the hard disk drive in place. If your

assembly has metal screws, discard them after removal.

Step 5 Remove the hard disk drive and the plastic insulator shields on either side of it. (Some disk

assemblies do not have plastic insulator shields.) Put the disk drive on the nonconducting

mat.

Installing the Hard Disk Drive in the New Disk Assembly

Step 6 Before you install the hard disk drive in the new disk assembly, fold the ribbon cable into

the area at the top of the assembly, leaving the connector hanging out at the rear of the

assembly (see Figure 4). The object is to arrange the ribbon cable so that the hard disk can

be installed on top of it, and then connected to it.

Step 7 Insert the plastic shields at either side of the disk assembly, lining up the holes in the shields

with the screw holes in the sides of the disk assembly. (See Figure 4.)

Step 8 Insert the hard disk drive into the disk assembly, orienting the disk so that the two

connectors face the rear of the assembly. (See Figure 4.) Line up the screw holes in the drive

with the holes in the plastic shields and in the disk assembly.

Step 9 Thread each of the four plastic screws through a plastic washer and insert the screws into

the holes in the sides of the disk assembly. Use the slot-tip screwdriver to tighten the screws.

Be careful not to overtighten; plastic screws strip easily.

Step 10 Locate two connectors on the disk assembly: the connector labeled JH-1 on the SCSI

ribbon cable referred to in Step 6, and a smaller, 3-wire power connector labelled DCHD.

Both connectors are called out in Figure 4.

Step 11 With its JH-1 label facing up, attach the SCSI connector on the ribbon cable to the mating

connector on the rear edge of the hard disk drive.

Step 12 With its DCHD label facing down, attach the 3-wire power connector to the mating

connector on the rear edge of the hard disk drive.

Step 13 Insert the new disk assembly into the chassis.

Caution When the pins begin to engage, push the disk assembly slowly and ﬁrmly to avoid

damaging the pins.

Step 14 Tighten the two captive screws that fasten the disk assembly to the chassis.

Step 15 If your system has one NP, skip to Step 16 now. If your system has two NPs, repeat Step

1 through Step 14 for the second disk assembly.

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Cisco LightStream 2020 Bedienungsanleitung Seite 6