User manual

Glossary
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Glossary
high availability A performance feature characterized by hardware component
redundancy and hot-swappability (enabling non-disruptive
maintenance). High-availability systems maximize system uptime
while providing superior reliability, availability, and serviceability.
hop Data transfer from one node to another node.
hop count ISL connections.
host bus adapter Logic card that provides a link between the server and storage
subsystem, and that integrates the operating systems and I/O
protocols to ensure interoperability.
hot-swapping Removing and replacing a device’s components while the device
continues to operate normally.
hub In Fibre Channel, a device that connects nodes into a logical loop by
using a physical star topology.
I
IML See initial machine load.
inband management Management of the switch through Fibre Channel connection to a
port card.
information message Message telling a user that a function is performing normally or has
completed normally. See also error message and warning message.
initial machine load Also known as IML. Hardware reset for the CTP card on the switch. It
does not affect other hardware. It is initiated by pushing the reset
(RST) button on the machine’s front panel.
initial program load Process of initializing the device and causing the operating system to
start. Initiated through a menu in the Product Manager.
input/output
configuration
The collection of channel paths, control units, and I/O devices that
attaches to the FICON or zSeries processor.
input/output
configuration
program
A program that defines all available I/O devices and channel paths to
an IBM FICON or zSeries processor system. Replaced by the