IBM V7000 User Manual

68 IBM Flex System V7000 Storage Node Introduction and Implementation Guide
There are three types of volumes:
򐂰 Striped volume:
A striped volume is allocated using one extent from each MDisk at a time in the storage
pool. This process continues until the space required for the volume has been satisfied. It
is also possible to supply a list of MDisks to use.
򐂰 Sequential volume:
A sequential volume is where the extents are allocated one after the other from one Mdisk.
If there is not enough space on a single Mdisk, the creation of the sequential volume fails.
If a volume is required to be expanded, the sequential volume is converted to a striped
volume by policy when the expansion occurs.
Figure 2-15 shows examples of the striped and sequential volume types.
Figure 2-15 Striped and sequential volumes
򐂰 Image mode:
Image mode volumes are special volumes that have a direct relationship with one MDisk.
They are used to migrate existing data into and out of IBM Flex System V7000 Storage
Node.
When the image mode volume is created, a direct mapping is made between extents that
are on the MDisk and the extents that are on the volume. The logical block address (LBA)
x on the MDisk is the same as the LBA x on the volume, which ensures that the data on
the MDisk is preserved as it is brought into the clustered system (Figure 2-16).

IBM V7000 Specifications

General

Model	IBM Storwize V7000
Storage Type	Hybrid Flash Array
Maximum Capacity	1.2PB
RAID Levels	0, 1, 5, 6, 10
Connectivity	8 Gbps Fibre Channel, 16 Gbps Fibre Channel, 1 Gbps iSCSI, 10 Gbps iSCSI
Management	Command-line interface (CLI), Graphical user interface (GUI)
Form Factor	2U
Drive Bays	12
Maximum Raw Capacity	1.2PB
Operating System Support	AIX, HP-UX, Linux, VMware, Windows
Data Reduction Features	Real-time Compression, Deduplication
Drive Types	SSD, HDD
Scalability	Scale-up (drive enclosures) and scale-out (clustering) capabilities