6760 ServerNet/DA Manual

Glossary
6760 ServerNet/DA Manual—424879-003
Glossary-24
donor system
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 ServerNet adapter. A ServerNet adapter that occupies an entire ServerNet
adapter slot in an HP NonStop™ S-series server. Contrast with single-high ServerNet
adapter.
double-high stack. A stack that includes a base, a frame, and two 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 customer-replaceable unit (CRU). 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
.
drive. See disk drive, optical 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
from a single inline memory module (SIMM) in that the connections on each side of the
module connect to different chips, whereas the connections on both sides of a SIMM