switches, hubs do not aggregate bandwidth. Hubs typically support the
addition or removal of nodes from the bus while it is operating. (S)
Contrast with switch.
I
ID See identifier.
identifier (ID)
A sequence of bits or characters that identifies a user, program device, or
system to another user, program device, or system.
idle In a FlashCopy mapping, the state that occurs when the source and target
virtual disks (VDisks) act as independent VDisks even if a mapping exists
between the two. Read and write caching is enabled for both the source
and the target.
idling The status of a pair of virtual disks (VDisks) that have a defined copy
relationship for which no copy activity has yet been started.
In a Metro or Global Mirror relationship, the state that indicates that the
master virtual disks (VDisks) and auxiliary VDisks are operating in the
primary role. Consequently, both VDisks are accessible for write I/O
operations.
idling-disconnected
In a Global Mirror relationship, the state that occurs when the virtual disks
(VDisks) in this half of the consistency group are all operating in the
primary role and can accept read or write I/O operations.
illegal configuration
A configuration that will not operate and will generate an error code to
indicate the cause of the problem.
image mode
An access mode that establishes a one-to-one mapping of extents in the
managed disk (MDisk) with the extents in the virtual disk (VDisk). See
also managed space mode and unconfigured mode.
image VDisk
A virtual disk (VDisk) in which there is a direct block-for-block translation
from the managed disk (MDisk) to the VDisk.
IML See initial microcode load.
inconsistent
In a Metro or Global Mirror relationship, pertaining to a secondary virtual
disk (VDisk) that is being synchronized with the primary VDisk.
inconsistent-copying
In a Global Mirror relationship, the state that occurs when the primary
virtual disk (VDisk) is accessible for read and write input/output (I/O)
operations, but the secondary VDisk is not accessible for either. This state
occurs after a start command is issued to a consistency group that is in the
inconsistent-stopped state. This state also occurs when a start command is
issued, with the force option, to a consistency group that is in the idling or
consistent-stopped state.
inconsistent-disconnected
In a Global Mirror relationship, a state that occurs when the virtual disks
(VDisks) in the half of the consistency group that is operating in the
secondary role are not accessible for either read or write I/O operations.
Glossary 171
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