Subsystem Device Driver For Open-Systems; Multiple Allegiance For Ficon Hosts; Ds6000 Interfaces; Ibm Totalstorage Ds Storage Manager - IBM TotalStorage DS6000 Attachment Manual

Inband commands over remote mirror link

Subsystem Device Driver for open-systems

The IBM TotalStorage Multi-path Subsystem Device Driver (SDD) supports
open-systems hosts.
The Subsystem Device Driver (SDD) resides in the host server with the native disk
device driver for the storage unit. It uses redundant connections between the host
server and disk storage in the DS6000 series to provide enhanced performance and
data availability.

Multiple allegiance for FICON hosts

The DS6000 series provides multiple allegiance facility support for FICON hosts.
The multiple allegiance facility enables the storage unit to accept concurrent I/O
requests for a volume from multiple channel paths. This enables the storage unit to
process requests from separate FICON hosts in parallel. Parallel processing of
requests improves throughput and performance. The multiple allegiance facility
does not require any user action.

DS6000 Interfaces

This section describes the following interfaces:
v IBM TotalStorage DS Storage Manager
v DS Open application programming interface
v DS Command-Line Interface (CLI)

IBM TotalStorage DS Storage Manager

The IBM TotalStorage DS Storage Manager is a program interface that is used to
perform logical configurations and Copy Services management functions.
The DS Storage Manager program is installed as a GUI (graphical mode) or as an
unattended (silent mode) installation for the supported operating systems. It can be
accessed from any location that has network access using a Web browser. It offers
you the following choices:
Simulated configuration
Real-time configuration
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DS6000 Host Systems Attachment Guide
In a remote mirror environment, inband commands are issued to a source
volume of a remote mirror and copy volume pair on a local storage unit and
sent across paths (acting as a conduit) to a remote storage unit to enable a
FlashCopy pair to be established at the remote site. This eliminates the
need for a network connection to the remote site solely for the management
of FlashCopy. This function is available through the use of command-line
interface commands.
You install this component on your PC or the Master Console which
provides the ability to create or modify logical configurations when your
storage unit is disconnected from the network. After creating the
configuration, you can save it and then apply it to a network attached
storage unit at a later time.
This component is preinstalled on your HMC. It provides you the ability to
create logical configurations and use Copy Services features when your
storage unit is attached to the network. This component provides you with
real-time (online) configuration support.