SCF Reference Manual for the Storage Subsystem (G06.27+, H06.04+)

Glossary
SCF Reference Manual for the Storage Subsystem—529937-008
Glossary-14
TACL
TACL. See HP Tandem Advanced Command Language (TACL).
tape drive. A device that moves magnetic tape past magnetic read/write heads, which read
data from or write data to the tape.
TAPE object type. The Subsystem Control Facility (SCF) object type for all tape drives
attached to your system.
TB. See terabyte (TB).
terabyte (TB). A unit of measurement equal to 1,099,511,627,776 bytes (1024 gigabytes).
See also gigabyte (GB), kilobyte (KB), and megabyte (MB).
TMF. See HP NonStop™ Transaction Management Facility (TMF).
topology. The physical layout of components that define a local area network (LAN), wide
area network (WAN), or ServerNet fabric.
topology branch. A NonStop S-series processor enclosure and the I/O enclosures
attached to it.
TSM. See Compaq TSM.
TSM package. See Compaq TSM package.
uninterruptable power source (UPS). The equipment used to provide an uninterruptable
source of power to connected equipment if a main power outage occurs. The basic
components of any UPS system are a rectifier/charger that converts alternating-current
(ac) power to direct-current (dc) power, batteries that store the dc power, and an
inverter that converts the dc power back into ac power for distribution to the load.
UPS. See uninterruptable power source (UPS).
volume. A logical disk drive, which can be one or two magnetic disk drives. In HP NonStop
S-series systems, volumes have names that begin with a dollar sign ($), such as
$DATA. See also mirrored volume.
wild-card character. A character that stands for any possible character or characters in a
search string or in a name applying to multiple objects. In Subsystem Control Facility
(SCF) object-name templates, two wild-card characters can appear:? (question mark)
for a single character and * (asterisk) for zero or more consecutive characters. See
also object-name template.
world-wide name (WWN). A unique, 64-bit number assigned to hardware ports.
WORM. Write-Once Read-Many times. A media storage class in which data, once written,
cannot be erased or overwritten.
WWN. See world-wide name (WWN).