IBM Flex System V7000 User Manual

64 IBM Flex System V7000 Storage Node Introduction and Implementation Guide
A multitiered storage pool is used to enable automatic migration of extents between disk tiers
using the IBM Flex System V7000 Storage Node Easy Tier function. Figure 2-14 shows these
components.
Figure 2-14 IBM Flex System V7000 Storage Node with single and multi-tier pools
2.5.9 Volumes
A volume is a virtual logical disk that is presented to a host system by the clustered system. In
our virtualized environment, the host system has a volume mapped to it by IBM Flex System
V7000 Storage Node. The IBM Flex System V7000 Storage Node translates this volume into
a number of extents, which are allocated across MDisks. The advantage with storage
virtualization is that the host is “decoupled” from the underlying storage, so the virtualization
appliance can move the extents around without impacting the host system.
The host system cannot directly access the underlying MDisks in the same manner as it could
access RAID arrays in a traditional storage environment.

IBM Flex System V7000 Specifications

General

Form Factor	2U
Model	IBM Flex System V7000
Category	Storage
Power Supply	Dual redundant power supplies
Storage Controller	Dual active-active controllers
RAID Levels	RAID 0, 1, 5, 6, 10
Maximum Drives	240
Expansion Enclosures	Up to 9
Drive Types Supported	SSD, HDD
Host Interface Ports	8 Gbps FC
Scalability	Scalable with expansion enclosures
Operating Temperature	5°C to 40°C
Management Interface	Web-based GUI, CLI, SMI-S