HP storageworks HSG80 Reference Manual page 221

Glossary
HSUTIL
Format and Device Code Load Utility.
I/O
Refers to input and output functions.
I/O driver
The set of code in the kernel that handles the physical I/O to a device. This is implemented as
a fork process. Also called driver.
I/O interface
See interface
I/O module
A device that integrates an enclosure with either an 8-bit single-ended SCSI bus, 16-bit
single-ended SCSI bus, 16-bit differential SCSI bus, or Fibre Channel bus.
I/O operation
The process of requesting a transfer of data from a peripheral device to memory (or visa
versa), the actual transfer of the data, and the processing and overlaying activity to make the
request and transfer occur.
initiator
A SCSI device that requests an I/O process to be performed by another SCSI device, namely,
the SCSI target. The controller is the initiator on the device bus. The host is the initiator on the
host bus.
instance code
A 4-byte value displayed in most text error messages and issued by the controller when a
subsystem error occurs. The instance code indicates when during software processing the error
was detected.
interface
A set of protocols used between components, such as cables, connectors, and signal levels.
IPI
Intelligent Peripheral Interface. An ANSI standard for controlling peripheral devices by a host
computer.
IPI-3 Disk
Intelligent Peripheral Interface Level 3 for Disk.
HSG80 Array Controller V8.7 Command Line Interface Reference Guide Glossary–13