Chapter 2. Introduction to IBM Flex System V7000 Storage Node 41
2.3 IBM Flex System V7000 Storage Node
IBM Flex System V7000 Storage Node is based on two enclosure types; the IBM Flex System
V7000 Control Enclosure and the IBM Flex System V7000 Expansion Enclosure. Both of
these enclosures reside in a newly designed common chassis that fits into the IBM Flex
System Enterprise chassis. This new enclosure requires a space equal to two high and
double wide slots to be available for each internal enclosure. Figure 2-2 shows an IBM Flex
System V7000 Storage Node that has been built with a control enclosure and one expansion
enclosure.
Figure 2-2 IBM Flex System V7000 Storage Node
Both the control and expansion enclosures connect to the Flex System Enterprise chassis
through the midplane interconnect for their power and internal control connections. The
control enclosure (A) also connects to the IBM Flex System I/O modules and switches for
host I/O and replication features through this midplane. The control enclosure also houses a
pair of redundant control canisters along with their cache batteries for backup.
The expansion enclosure (B) uses the Serial Attached SCSI (SAS2) 6 Gbps chain connection
on the front of the control and expansion canisters (C) for connecting the chain together for
drive I/O and expansion control operations. The expansion enclosure houses a pair of
expansion canisters instead of the control canisters through which it connects and manages
the SAS chain connections to its disk drives. It also has a second SAS2 port through which it
provides a connection for continuing the chain to additional expansions behind it.
IBM Flex System V7000 Storage Node is mainly intended to be a scalable, internal storage
system, to support the internal compute nodes of the IBM Flex System. When needed, it can
be expanded in its capacity by attaching external IBM Storwize V7000 expansion enclosures
to its SAS2 chain. Both the 2076-212 and the 2076-224 model of the Storwize V7000
expansions are supported.
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