Get up to speed quickly on storage area networks (SANs) in the real world. This detailed resource explains SAN technology and functions, showing how to manage, configure, and build your own SAN for a wide variety of applications.
A property of operations on data; an idempotent operation is one that has the same result no matter how many times it is performed on the same data. Writing a block of data to a disk is an idempotent operation, whereas writing a block of data to a tape is not because writing a block of data twice to the same tape results in two adjacent copies of the block.
Idle, idle word
An ordered set of four transmission characters normally transmitted between frames to indicate that a Fibre Channel network is idle.
IETF
Internet Engineering Task Force.
Ignored (field)
A field that is not interpreted by its receiver.
IKE
Internet Key Exchange.
Implicit addressing
A form of addressing usually used with tapes in which the data s address is inferred from the form of the access request. Tape requests do not include an explicit block number but instead specify the next or previous block from the current tape position, from which the block number must be inferred by device firmware.
In-band virtualization
Virtualization functions or services that are in the data path. In a system that implements in-band virtualization, virtualization services such as address mapping are performed by the same functional components used to read or write data.
Incremental backup
A collective term for cumulative incremental backups and differential incremental backups. Any backup in which only data objects modified since the time of some...
Copyright The McGraw-Hill Companies, Inc. 2003 under license agreement with Books24x7