Revision 1.0
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HDM High Density Metric
HIS Integrated Heat Spreader. The metallic surface covering of a processor package
intended to encourage the flow of heat away from the processor die and to the
heatsink.
HL Hub-Link
HLT Halt.
HP Hot-plug.
HPC High Pin Count
HPIB Hot-Plug Indicator Board
HSBP Hot-swap backplane
HSC Hot-Swap Controller. The microcontroller that implements the SAF-TE command
set and controls the fault lights and drive power on a hot-swap backplane.
HT Technology Hyper-Threading Technology
I/O Input / Output
I/O APIC I/O Advanced Programmable Interrupt Controller.
I
2
C or I2C Inter-Integrated Circuit bus. A multi-master, 2-wire, serial bus used as the basis for
the Intelligent Management Bus.
I
2
O Intelligent I/O. An open architecture for the development of device drivers in
network system environments
IA Intel
®
architecture
IBF Input buffer
IC Integrated Circuit
I-cache Instruction cache. Processor-local cache dedicated for memory locations retrieved
through instruction fetch operations.
ICH I/O controller hub
ICMB Intelligent Chassis Management Bus
IDE Integrated Device Electronics
IEC International Electrotechnical Commission
IERR internal error
IMB Intelligent Management Bus
INIT initialization signal
Intel
®
I/OAT Intel
®
I/O Acceleration Technology
Intel
®
RMM2
Intel® Remote Management Module 2
Intel
®
VT Intel
®
Virtualization Technology
IOP I2O-compliant I/O Platforms. These typically contain an I/O processor and I/O
subsystem.
IPMB Intelligent Platform Management Bus. Name for the architecture, protocol, and
implementation of a special bus that interconnects the baseboard and chassis
electronics and provides a communications media for system platform
management information. The bus is built on I
2
C and provides a communications
path between management controllers such as the BMC and HSC.
IPMI Intelligent platform Management Interface. An industry standard that defines
standardized, abstracted interfaces to platform management hardware.
ISA Industry Standard Architecture
iSCSI Internet SCSI.
ISP In System Programmable
ITE Information Technology Equipment