I O device - meaning and definition. What is I O device
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What (who) is I O device - definition

REDUNDANT IO TECHNOLOGY
Multipath IO; Multipath device; I/O multipathing
  • Multipath access to a [[RAID]] using [[Linux DM Multipath]] (''Legend:'' "HBA" = [[Host bus adapter]], "SAN" = [[Storage area network]])

Asynchronous I/O         
FORM OF INPUT/OUTPUT PROCESSING
Non-blocking IO; Blocking I/O; Synchronous I/O; Non-blocking I/O; Asynchronous Input/Output; Asynchronous input/output; Asynchronous input-output; Asynchronous Input-Output; Asynchronous Input Output; Asynchronous input output; Asynchronous i/o; Asynchronous io; Asynchronous IO; Async I/O; Async i/o; Async input/output; Async Input/Output; Async IO; Async io; Asynchronous read; Asynchronous write
In computer science, asynchronous I/O (also non-sequential I/O) is a form of input/output processing that permits other processing to continue before the transmission has finished. A name used for asynchronous I/O in the Windows API is overlapped I/O.
Channel I/O         
HIGH-PERFORMANCE INPUT/OUTPUT ARCHITECTURE
Channel controller; I/O processor; Channel controllers; Channel command word; Channel Command Word; I/O channel; I/o channel; System Assistance Processor; Channel program; System Assist Processor; IO channel processor
In computing, channel I/O is a high-performance input/output (I/O) architecture that is implemented in various forms on a number of computer architectures, especially on mainframe computers. In the past, channels were generally
Io         
WIKIMEDIA DISAMBIGUATION PAGE
IO; Io (astronomy); I O; IO (disambiguation); Io (disambiguation); Io.; I.O.; IO (band); I o
<i>·nouni> An exclamation of joy or triumph;
- often interjectional.

Wikipedia

Multipath I/O

In computer storage, multipath I/O is a fault-tolerance and performance-enhancement technique that defines more than one physical path between the CPU in a computer system and its mass-storage devices through the buses, controllers, switches, and bridge devices connecting them.

As an example, a SCSI hard disk drive may connect to two SCSI controllers on the same computer, or a disk may connect to two Fibre Channel ports. Should one controller, port or switch fail, the operating system can route the I/O through the remaining controller, port or switch transparently and with no changes visible to the applications, other than perhaps resulting in increased latency.

Multipath software layers can leverage the redundant paths to provide performance-enhancing features, including dynamic load balancing, traffic shaping, automatic path management, and dynamic reconfiguration.