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Chapter 3. Components overview
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Figure 3-16 EXP400 back view
The EXP400 Expansion unit is available in 3 models:
1. 1733-1RU - comes with two 500-watt North America AC power supply with
fan units, one Enclosure Services Module (the second ESM is optional), a
filler panel to cover the empty ESM bay, and 14 drive filler panels.
2. 1733-1RX - same as 1733-1RU but with EMEA AC power.
3. 1733-2RX - comes with two -48 volt DC power supply with built-in fan units,
two ESMs, and 14 drive filler panels.
The IBM DS400 storage controller has two external SCSI connectors (see
Figure 3-14 on page 48) which can connect two optional EXP400 expansion
units allowing up to 7.8 TB (assuming 300 GB hard drives) of additional data.
When an EXP400 is attached to a DS400 with dual controllers, both EXP400
ESM boards must be connected to the DS400. It is important that the EXP400 be
connected to SCSI Expansion Channel 3 on both DS400 controllers, or to SCSI
Expansion Channel 4 on both DS400 controllers.
Note:
SCSI ID 6 (slot 7) must be left free in each EXP400 enclosure for SCSI
controller use. This means that only 13 drives can be installed in each
enclosure.
Summary of Contents for TotalStorage DS300
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