NonStop S-Series Server Description Manual (G06.24+)

Glossary
HP NonStop S-Series Server Description Manual—520331-003
Glossary-50
interprocessor communications (IPC).
publications for the NonStop range of servers often use the term “connectivity” in this
context. See also connectivity.
interprocessor communications (IPC). The exchange of messages between processors.
intrinsic library. See Shared Millicode Library.
instance. A particular case of a class of items or objects. For example, a process is defined
as one instance of the execution of a program; multiple processes might be executing
the same program simultaneously. Also, instance data refers to global data of a
program or library; each process has a its own instance of these data.
instance data. For each process using a dynamic-link library, a data segment area
containing the global variables used by the library.
I/O cabinet. See I/O enclosure.
I/O controller. The hardware logic that controls computer I/O operations for a particular set
of devices, such as disks, tapes, terminals, or communications lines. See also
ServerNet addressable controller (SAC).
I/O enclosure. An HP NonStop™ S-series system enclosure containing exactly one
module, which includes ServerNet adapters, disk drives, components related to the
ServerNet fabrics, and components related to electrical power and cooling for the
enclosure. An I/O enclosure is identical to a processor enclosure, except that it
contains I/O multifunction (IOMF) customer-replaceable units (CRUs) instead of
processor multifunction (PMF) CRUs.
IOMF CRU. See I/O multifunction (IOMF) CRU.
IOMF 2 CRU. See I/O multifunction (IOMF) 2 CRU.
I/O multifunction (IOMF) CRU. (1) An HP NonStop™ S-series customer-replaceable unit
(CRU) that connects an I/O enclosure to a processor enclosure through a ServerNet
cable and supplies power to the components within the IOMF CRU as well as
redundantly to the disk drives, SCSI terminators, and ServerNet adapters in that
enclosure. The IOMF CRU contains a power supply, a service processor (SP), a
ServerNet router, an Ethernet controller, an external ServerNet port, and three SCSI
ServerNet addressable controllers (S-SACs) in a single unit. (2) A collective term for
both IOMF CRUs and IOMF 2 CRUs when a distinction between the two types of
CRUs is not required.
I/O multifunction (IOMF) 2 CRU. An HP NonStop™ S-series customer-replaceable unit
(CRU) that connects an I/O enclosure to a processor enclosure through a ServerNet
cable and supplies power to the components within the IOMF 2 CRU as well as
redundantly to the disk drives, SCSI terminators, and ServerNet adapters in that
enclosure. The IOMF 2 CRU contains a power supply, a service processor (SP), a
ServerNet router 2, an Ethernet controller, three configurable ServerNet ports, and