IBM DS8900F User Manual

The Compare and Write command is supported on all open systems xed block volumes, including
Metro Mirror and Global Mirror primary volumes and FlashCopy source and target volumes.
XCOPY or Full Copy
The XCOPY (or extended copy) command copies multiple les from one directory to another or across
a network.
Full Copy copies data from one storage array to another without writing to the VMware ESX Server
(VMware vStorage API).
The following restrictions apply to XCOPY:
• XCOPY is not supported on Extent Space Efcient (ESE) volumes
• XCOPY is not supported on volumes greater than 2 TB
• The target of an XCOPY cannot be a Metro Mirror or Global Mirror primary volume
• The Copy Services license is required
Block Zero (Write Same)
The SCSI Write Same command is supported on all volumes. This command efciently writes each
block, faster than standard SCSI write commands, and is optimized for network bandwidth usage.
IBM vCenter plug-in for ESX 4.x
The IBM vCenter plug-in for ESX 4.x provides support for the VAAI interfaces on ESX 4.x.
VMware vCenter Site Recovery Manager 5.0
VMware vCenter Site Recovery Manager (SRM) provides methods to simplify and automate disaster
recovery processes. IBM Site Replication Adapter (SRA) communicates between SRM and the storage
replication interface. SRA support for SRM 5.0 includes the new features for planned migration,
reprotection, and failback. The supported Copy Services are Metro Mirror, Global Mirror, Metro-Global
Mirror, and FlashCopy.
The IBM Storage Management Console plug-in enables VMware administrators to manage their systems
from within the VMware management environment. This plug-in provides an integrated view of IBM
storage to VMware virtualize datastores that are required by VMware administrators. For information, see
the IBM Storage Management Console for VMware vCenter (http://www.ibm.com/support/
knowledgecenter/en/STAV45/hsg/hsg_vcplugin_kcwelcome_sonas.html) online documentation.
Performance for IBM Z
The storage system supports the following IBM performance enhancements for IBM Z environments.
• Parallel Access Volumes (PAVs)
• Multiple allegiance
• z/OS Distributed Data Backup
• z/HPF extended distance capability
• zHyperLink
Parallel Access Volumes
A PAV capability represents a signicant performance improvement by the storage unit over traditional
I/O processing. With PAVs, your system can access a single volume from a single host with multiple
concurrent requests.
You must congure both your storage unit and operating system to use PAVs. You can use the logical
conguration denition to dene PAV-bases, PAV-aliases, and their relationship in the storage unit
hardware. This unit address relationship creates a single logical volume, allowing concurrent I/O
operations.
Static PAV associates the PAV-base address and its PAV aliases in a predened and xed method. That is,
the PAV-aliases of a PAV-base address remain unchanged. Dynamic PAV, on the other hand, dynamically
Chapter 3. Data management features
41

IBM DS8900F Specifications

General

Brand	IBM
Model	DS8900F
Category	Storage
Language	English