NonStop S-Series Planning and Configuration Guide (G06.26+)

Glossary
HP NonStop S-Series Planning and Configuration Guide—523303-017
Glossary-27
donor system
configures the DNS with a list of hostnames and Internet protocol (IP) addresses,
allowing users of workstations that are configured to query the DNS to specify remote
systems by hostnames rather than by IP addresses. DNS domains should not be
confused with Windows NT networking domains. See also DNS server
, Network
Information Service (NIS), and ping.
donor system. The computer system you make smaller by removing enclosures, either to
reduce the system or to add the removed enclosures to another target system
, using a
process known as system reduction.
double-high stack. A stack that includes a base, a frame, and two HP NonStop™ S-series
system enclosures. Contrast with single-high stack
.
double-wide plug-in card (PIC). A large-form-factor plug-in card (PIC) that occupies two
adjacent PIC slots within a ServerNet adapter or an HP NonStop™ cluster switch. See
also single-wide plug-in card (PIC)
.
download. The process of transferring software from one location to another, where the
transferring entity initiates the transfer.
download line task. Any task running under the Portable Silicon Operating System (pSOS)
system product, such as a data protocol.
downtime. Time during which a computer system is not capable of doing useful work
because of a planned or unplanned outage. From the end user’s perspective,
downtime is any time a needed application is not available.
downward compatibility. The ability of a requester to operate with a server of an earlier
revision level. In this case, the requester is downward-compatible with the server, and
the server is upward-compatible with the requester. Contrast with upward compatibility
.
DRAM. Dynamic random-access memory.
drive. See disk drive or tape drive.
dropout. A voltage loss of very short duration (that is, milliseconds).
DSC. See Dynamic System Configuration (DSC).
DSM. See Distributed Systems Management (DSM).
DSM/SCM. See Distributed Systems Management/Software Configuration Manager
(DSM/SCM).
DSV. See distribution subvolume (DSV).
DTE. See data terminal equipment (DTE).
dual inline memory module (DIMM). Small circuit boards carrying memory integrated
circuits, with signal and power pins on both sides of the board. A DIMM is different