Controller and drive enclosures


Controller units and drive enclosures

EXP400 SCSI drive enclosure

DS400 controller connection locations

DS400 and EXP400 SCSI connections

 DS400 WWNN and WWPN assignment convention

 

 EXP400 SCSI drive enclosure

A maximum of two expansion units can be attached to the DS400.  Up to 13 drives can be installed on each EXP400 (ID6 must be left empty). Figure 1 shows an EXP400 SCSI disk drive enclosure with two hot-swappable ESM modules.

Each ESM has a SCSI connector that supports up to seven Ultra320 SCSI hard disk drives. This unit can be connected to a DS400 storage enclosure. For troubleshooting help on the EXP400, click on the following link:

ftp://ftp.software.ibm.com/pc/pccbbs/pc_servers_pdf/90p3548.pdf

Figure 1. EXP400 SCSI drive enclosure

 

DS400 controller connection locations

Figure 2 shows the locations of the controller connections in a DS400 Fibre Channel storage subsystem.

Figure 2. DS400 controller connection locations


 DS400 and EXP400 SCSI connections

Figure 3 shows a configuration containing both a DS400 controller unit and an EXP400 expansion unit. The host connection to the DS400 uses optical cables to the controller SFPs. The connection to the EXP400 uses SCSI cables. When the EXP400 is attached to a dual controller enclosure, it must be attached to both controller A and controller B using the same SCSI channel (either 3 or 4) as shown in figure 3.

Figure 3. DS400 and EXP400 configuration

 

WWNN and WWPN assignment convention.

Table 1 shows an example of a WWNN and WWPN assignment convention for the DS400 enclosure.

Table 1 - WWNN and WWPN assignment convention

Node and Port Name Convention

Enclosure

FC0

FC1

Node Name

20000000d1262472

NA

NA

 Controller A Port names

NA

21000000d1262472

21010000d1262472

 Controller B Port names

NA

21020000d1262472

21030000d1262472

 

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