Справочник Пользователя для IBM Flex System V7000 Expansion Enclosure 4939H29

Chapter 2. Introduction to IBM Flex System V7000 Storage Node 

Draft Document for Review January 29, 2013 12:52 pm

The IBM Flex System V7000 Storage Node is based on two enclosure types; 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 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.

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 IO modules and switches for host 
IO 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 IO 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. 

Volume

As used with the IBM Flex System V7000 Storage Node environment, this is 
the virtually defined device created for use by the host or the IBM Flex System 
V7000 Storage Node cluster to store IO data.