IBM DS8000 User Manual page 226

including the DS Storage Manager and
the DS8000 Copy Services.
IBM System Storage Multipath Subsystem
Device Driver (SDD)
IBM software that provides multipath
configuration support for a host system
that is attached to storage devices. SDD
provides enhanced data availability,
dynamic input/output load balancing
across multiple paths, and automatic path
failover protection.
IBM System Storage Resiliency Family
A set of hardware and software features
and products, as well as integrated
software and services that are available on
the IBM System Storage DS8000 series
and the IBM TotalStorage Enterprise
Storage Server, Models 750 and 800.
IBM Systems
The IBM brand name for the System i,
System p, System x
families of products.
IBM TotalStorage Enterprise Storage Server
Network (ESSNet)
A private network providing Web
browser access to the Enterprise Storage
Server. IBM installs the ESSNet software
on an IBM workstation called the IBM
TotalStorage ESS Master Console,
supplied with the first ESS delivery.
image See storage image.
IML See initial microcode load.
implicit allegiance
In Enterprise Systems Architecture/390, a
relationship that a control unit creates
between a device and a channel path
when the device accepts a read or write
operation. The control unit guarantees
access to the channel program over the
set of channel paths that it associates with
the allegiance.
initial microcode load (IML)
The action of loading microcode for a
computer into that computer's storage.
initial program load (IPL)
The action of loading software into a
computer, typically an operating system
that controls the computer.
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DS8000 User's Guide
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, and System z
initiator
A SCSI device that communicates with
and controls one or more targets. Contrast
with target.
i-node The internal structure in an AIX operating
system that describes the individual files
in the operating system. It contains the
code, type, location, and owner of a file.
input/output (I/O)
Pertaining to (a) input, output, or both or
(b) a device, process, or channel involved
in data input, data output, or both.
input/output configuration data set
A configuration definition built by the
I/O configuration program (IOCP) and
stored on disk files associated with the
processor controller.
interleave
To automatically create two striped
partitions across the drives in a RAID-5
array, both of which use the
count-key-data (CKD) record format.
Internet Protocol (IP)
In the Internet suite of protocols, a
protocol without connections that routes
data through a network or
interconnecting networks and acts as an
intermediary between the higher protocol
layers and the physical network. The
upper layer supports one or more logical
protocols (for example, a SCSI-command
protocol and a System z command
protocol). Refer to ANSI X3.230-199x. The
IP acronym is the IP in TCP/IP. See also
Transmission Control Protocol/Internet
Protocol.
invalidate
To remove a logical data unit from cache
memory because it cannot support
continued access to the logical data unit
on the device. This removal might be the
result of a failure within the storage
server or a storage device that is
associated with the device.
I/O See input/output.
I/O adapter (IOA)
An input-output adapter on the PCI bus.
IOCDS
See input/output configuration data set.
IOCP See I/O Configuration Program.