DS400 controller connection locations
DS400 and EXP400 SCSI connections
DS400 WWNN and WWPN assignment convention
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 |