Specifications

Microsoft Internet Explorer (MSIE). Web browser
software manufactured by Microsoft.
MIH. See missing-interrupt handler.
mirrored pair. Two units that contain the same data.
The system refers to them as one entity.
mirroring. In host systems, the process of writing the
same data to two disk units within the same auxiliary
storage pool at the same time.
miscellaneous equipment specification (MES). IBM
field-installed change to a machine.
missing-interrupt handler (MIH). An MVS and
MVS/XA facility that tracks I/O interrupts. MIH informs
the operator and creates a record whenever an
expected interrupt fails to occur before a specified
elapsed time is exceeded.
MLC. See machine level control.
mobile service terminal (MoST). The mobile terminal
used by service personnel.
Model 100. A 2105 Model 100, often simply referred to
as a Mod 100, is an expansion enclosure for the ESS.
See 2105 and
MoST. See mobile service terminal.
MRPD. See machine reported product data.
MSIE. See Microsoft Internet Explorer.
MTBF. See mean time between failures.
multiple allegiance. An ESS hardware function that is
independent of software support. This function enables
multiple system images to concurrently access the
same logical volume on the ESS as long as the system
images are accessing different extents. See extent and
parallel access volumes.
multiple virtual storage (MVS). Implies MVS/390,
MVS/XA, MVS/ESA, and the MVS element of the
OS/390 operating system.
MVS. See multiple virtual storage.
N
Netfinity. Obsolete brand name of an IBM
Intel-processor-based server.
Netscape Navigator. Web browser software
manufactured by Netscape.
node. The unit that is connected in a fibre-channel
network. An ESS is a node in a fibre-channel network.
non-RAID. A disk drive set up independently of other
disk drives and not set up as part of a disk drive module
group to store data using the redundant array of disks
(RAID) data-striping methodology.
nonremovable medium. A recording medium that
cannot be added to or removed from a storage device.
nonretentive data. Data that the control program can
easily recreate in the event it is lost. The control
program may cache nonretentive write data in volatile
memory.
nonvolatile storage (NVS). (1) Typically refers to
nonvolatile memory on a processor rather than to a
nonvolatile disk storage device. On a storage facility,
nonvolatile storage is used to store active write data to
avoid data loss in the event of a power loss. (2) A
storage device whose contents are not lost when power
is cut off.
NVS. See nonvolatile storage.
O
octet. In Internet Protocol (IP) addressing, one of the
four parts of a 32-bit integer presented in dotted decimal
notation. dotted decimal notation consists of four 8-bit
numbers written in base 10. For example, 9.113.76.250
is an IP address containing the octets 9, 113, 76, and
250.
OEMI. See original equipment manufacturer’s
information.
open system. A system whose characteristics comply
with standards made available throughout the industry
and that therefore can be connected to other systems
complying with the same standards. Applied to the ESS,
such systems are those hosts that connect to the ESS
through SCSI or SCSI-FCP adapters. See Small
Computer System Interface and SCSI-FCP.
organizationally unique identifier (OUI). An
IEEE-standards number that identifies an organization
with a 24-bit globally unique assigned number
referenced by various standards. OUI is used in the
family of 802 LAN standards, such as Ethernet and
Token Ring.
original equipment manufacturer’s information
(OEMI). A reference to an IBM guideline for a
computer peripheral interface. The interface uses
ESA/390 logical protocols over an I/O interface that
configures attached units in a multidrop bus topology.
OUI. See organizationally unique identifier.
P
panel. The formatted display of information that
appears on a display screen.
196 ESS Host Systems Attachment Guide
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