NonStop S-Series Hardware Installation and FastPath Guide (G06.25+)

Glossary
HP NonStop S-Series Hardware Installation and FastPath Guide—529443-001
Glossary-54
instance 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 adapter module (IOAM). A collection of modular components that provides I/O
connectivity and can include ServerNet switch boards, Fibre Channel ServerNet
adapters (FCSAs), fans, and power supplies. In the IOAM, each module is a logical
entity that represents a single service domain.
I/O adapter module enclosure (IOAM enclosure). The sheet-metal carrier that is installed
in a standard 19-inch rack and contains the IOAM components.
IOAM. See I/O adapter module (IOAM).
IOAM enclosure. See I/O adapter module enclosure (IOAM enclosure).
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 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
three SCSI ServerNet addressable controllers (S-SACs) in a single unit.