Fujitsu PRIMEPOWER900, Руководство пользователя

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U41290-J-Z816-3-76 133
Glossary
100Base-TX
An IEEE standard. Applicable cable types are
unshielded twisted-pair (UTP) and shielded
twisted-pair (STP). Applicable connector type
is RJ45. Allows bandwidth of 100 Mbps, and
the maximum segment length is 100 m (328 ft).
10Base-T
An IEEE standard. Applicable cable type is
unshielded twisted-pair (UTP), and the
connector type is RJ45. Allows bandwidth of
10 Mbps, and the maximum segment length is
100 m (328 ft).
Auto termination
Performs automatic termination setting on the
adapter that is entered on the user side. Auto
termination is necessary to ensure high
reliability on SCSI buses.
Cache
A buffering memory unit whose capacity is
smaller and speed is higher than the main
memory unit. The cache memory retains
copies of the commands and data that may be
used later. The part being copied is
distinguished from the commands and data that
the processing unit obtains from the main
storage unit.
Configuration conflict
Indicates a combination of components or
settings that may not operate correctly as a
system.
DAT
Digital Audio Tape. A kind of magnetic tape
originally designed for audio format, now also
used by computers to back up data. The
physical specification of DAT for audio also
applies to the DAT for computer. However,
their quality and performance are different.
DIMM
Dual Inline Memory Module. It is one of
memory modules. DIMMs are classified by the
number of pins, such as 72, 144, and 168. Each
side of a DIMM sends out signals independent
of those from the other side.
Disk mirroring
With two hard disk drives, reading is performed
against one disk, and writing is performed
against both disks. When an error occurs and
reading from one disk is disabled, the other is
used for reading.
Dynamic Reconfiguration (DR)
A function for a partition with multiple system
boards to replace hardware resources, such as
processors, memory, and PCI cards, without
system interruption. Replacement is available
on a system board basis; the System Board
serves as a component of the partition. On the
main unit, a combination of dynamic
reconfiguration, the hot swap feature, and
partitioning of the main unit enables hot
swapping of faulty components on the system
board, hot additions of system boards, and
shifting system boards over partitions.
ECC
Error Checking and Correction. Examines and
corrects errors based on the error correcting
code. Generally, diagnosis can be performed in
wider range than corrections.