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RAID MDisk features
You can use the Storwize V7000 Unified management GUI or the command-line
interface (CLI) to create a RAID MDisk from the local drives. RAID (other than
RAID 0) offers redundancy and the ability to recover from the physical failure of a
drive.
A RAID MDisk can be composed of flash drives or hard disk drives (HDDs).
Creating a storage pool that contains both flash drive MDisks and HDD MDisks
enables the automatic data-placement mode of the IBM Easy Tier
®
function. By
using this mode, block volumes can take advantage of the better performance of
the higher speed flash drives. This is not important if the storage pool will be used
only for file volumes.
A Storwize V7000 Gen1 control enclosure supports up to 240 drives with RAID
levels 0, 1, 5, 6, and 10. A system can contain up to four control enclosures.
A Storwize V7000 Gen2 control enclosure supports up to 504 drives, but there can
be only 1056 drives per system.
When a file system is created, it will create and use volumes only in I/O group 0.
Drive features
Both flash drives and HDDs include these features:
v
Each drive is a 2.5-inch or a 3.5-inch serial-attached SCSI (SAS) drive.
v
Drives are hot-pluggable and hot-swappable.
Supported hosts
In a storage area network (SAN) environment, host systems are application servers
that access data from the storage controllers that are connected to the SAN. Hosts
that are running in a number of operating environments can connect to the storage
by using the Storwize V7000 Unified.
For a list of the supported host operating systems, see http://www-03.ibm.com/
systems/support/storage/ssic/interoperability.wss
Multipathing software
For more information, see http://www-03.ibm.com/systems/support/storage/
ssic/interoperability.wss
User interfaces
The Storwize V7000 Unified system provides these user interfaces:
v
The management GUI, a web-accessible graphical user interface (GUI) that
supports flexible and rapid access to storage management information
v
A command-line interface (CLI) that uses Secure Shell (SSH)
v
Service assistant, a web application that helps troubleshoot and resolve problems
on a node canister
Chapter 2. Planning for adding file modules
25
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