External Disk Subsystems; Exp30 Ultra Ssd I/O Drawer - IBM Power 720 Overview

Figure 2-30 SPCN cabling example
Various SPCN cables are available. Table 2-26 shows the available SPCN cable options to
satisfy various length requirements.
Table 2-26 SPCN cables
Feature code
a
6001
6006
a
6008
6007
a
6029
a. Supported, but no longer orderable

2.10 External disk subsystems

This section describes the external disk subsystems that can be attached to the Power 720
and Power 740:
EXP30 Ultra SSD I/O drawer (FC EDR1, CCIN 57C3)
EXP24S SFF Gen2-bay drawer for high-density storage (FC 5887)
EXP12S SAS expansion drawer (FC 5886)
IBM System Storage
Later sections give detailed information about the various external disk subsystems.

2.10.1 EXP30 Ultra SSD I/O drawer

The EXP30 Ultra SSD I/O drawer (FC EDR1) is a 1U high I/O drawer providing 30 hot-swap
SSD bays and a pair of integrated large write caches, high-performance SAS controllers
without using any PCIe slots on the POWER7+ server. The two high-performance, integrated
SAS controllers each physically provide 3.1 GB write cache. Working as a pair, they provide
mirrored write cache data and controller redundancy. The cache contents are designed to be
protected by built-in flash memory in case of power failure. If the pairing is broken, write cache
is not used after existing cache content is written out to the drive, and performance will
Power 720
or
Power 740
system unit
0
1
Description
Power Control Cable (SPCN) - 2 meter
Power Control Cable (SPCN) - 3 meter
Power Control Cable (SPCN) - 6 meter
Power Control Cable (SPCN) - 15 meter
Power Control Cable (SPCN) - 30 meter
I/O drawer
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Chapter 2. Architecture and technical overview
I/Odrawer
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