IBM DCS3860, Installation, User'S, And Maintenance Manual

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a unique worldwide name. It can act as
an originator or a responder.
nonvolatile storage (NVS)
A storage device whose contents are not
lost when power is cut off.
N_port
See node port .
NVS See nonvolatile storage .
NVSRAM
Nonvolatile storage random access
memory. See
nonvolatile storage .
Object Data Manager (ODM)
An AIX proprietary storage mechanism
for ASCII stanza files that are edited as
part of configuring a drive into the
kernel.
ODM See Object Data Manager .
out-of-band
Transmission of management protocols
outside of the fibre-channel network,
typically over Ethernet.
partitioning
See storage partition .
parity check
A test to determine whether the number
of ones (or zeros) in an array of binary
digits is odd or even.
A mathematical operation on the
numerical representation of the
information communicated between two
pieces. For example, if parity is odd, any
character represented by an even number
has a bit added to it, making it odd, and
an information receiver checks that each
unit of information has an odd value.
PCI local bus
See peripheral component interconnect local
bus .
PDF See portable document format .
performance events
Events related to thresholds set on storage
area network (SAN) performance.
peripheral component interconnect local bus
(PCI local bus)
A local bus for PCs, from Intel, that
provides a high-speed data path between
the CPU and up to 10 peripherals (video,
disk, network, and so on). The PCI bus
coexists in the PC with the Industry
Standard Architecture (ISA) or Extended
Industry Standard Architecture (EISA)
bus. ISA and EISA boards plug into an
IA
®
or EISA slot, while high-speed PCI
controllers plug into a PCI slot. See also
Industry Standard Architecture , Extended
Industry Standard Architecture .
polling delay
The time in seconds between successive
discovery processes during which
discovery is inactive.
port
A part of the system unit or remote
controller to which cables for external
devices (such as display stations,
terminals, printers, switches, or external
storage units) are attached. The port is an
access point for data entry or exit. A
device can contain one or more ports.
portable document format (PDF)
A standard specified by Adobe Systems,
Incorporated, for the electronic
distribution of documents. PDF files are
compact; can be distributed globally by
e-mail, the Web, intranets, or CD-ROM;
and can be viewed with the Acrobat
Reader, which is software from Adobe
Systems that can be downloaded at no
cost from the Adobe Systems home page.
premium feature key
A file that the storage system controller
uses to enable an authorized premium
feature. The file contains the feature
enable identifier of the storage system for
which the premium feature is authorized,
and data about the premium feature. See
also
feature enable identifier .
private loop
A freestanding arbitrated loop with no
fabric attachment. See also
arbitrated loop .
program temporary fix (PTF)
A temporary solution or bypass of a
problem diagnosed by IBM in a current
unaltered release of the program.
PTF See program temporary fix .
RAID See redundant array of independent disks
(RAID) .
RAID level
An array's RAID level is a number that
refers to the method used to achieve
redundancy and fault tolerance in the
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IBM System Storage DCS3860 Storage System: Installation, User's, and Maintenance Guide