88
http://www.tyan.com
Latency:
the amount of time that one part of a system spends waiting for another
part to catch up. This occurs most commonly when the system sends data out to a
peripheral device and has to wait for the peripheral to spread (peripherals tend to be
slower than onboard system components).
NVRAM:
ROM and EEPROM are both examples of Non-Volatile RAM, memory that
holds its data without power. DRAM, in contrast, is volatile.
Parallel port:
transmits the bits of a byte on eight different wires at the same time.
PCI (Peripheral Component Interconnect):
a 32 or 64-bit local bus (data pathway)
which is faster than the ISA bus. Local buses are those which operate within a
single system (as opposed to a network bus, which connects multiple systems).
PCI PIO (PCI Programmable Input/Output) modes:
the data transfer modes used
by IDE drives. These modes use the CPU for data transfer (in contrast, DMA
channels do not). PCI refers to the type of bus used by these modes to
communicate with the CPU.
PCI-to-PCI bridge:
allows you to connect multiple PCI devices onto one PCI slot.
Pipeline burst SRAM:
a fast secondary cache. It is used as a secondary cache
because SRAM is slower than SDRAM, but usually larger. Data is cached first to
the faster primary cache, and then, when the primary cache is full, to the slower
secondary cache.
PnP (Plug-n-Play):
a design standard that has become ascendant in the industry.
Plug-n-Play devices require little set-up to use. Devices and operating systems that
are not Plug-n-Play require you to reconfigure your system each time you add or
change any part of your hardware.
PXE (Preboot Execution Environment):
one of four components that together
make up the Wired for Management 2.0 baseline specification. PXE was designed
to define a standard set of preboot protocol services within a client with the goal of
allowing networked-based booting to boot using industry standard protocols.
RAID (Redundant Array of Independent Disks):
a way for the same data to be
stored in different places on many hard drives. By using this method, the data is
stored redundantly and multiple hard drives will appear as a single drive to the
operating system. RAID level 0 is known as striping, where data is striped (or
overlapped) across multiple hard drives, but offers no fault-tolerance. RAID level 1
is known as mirroring, which stores the data within at least two hard drives, but
does not stripe. RAID level 1 also allows for faster access time and fault-tolerance,
since either hard drive can be read at the same time. RAID level 0+1 is both striping
and mirroring, providing fault-tolerance, striping, and faster access all at the same
time.
Содержание S2925-E
Страница 4: ...4 http www tyan com NOTE...
Страница 10: ...10 http www tyan com 2 2 Block Diagram Tomcat n3400B S2925 E Block Diagram...
Страница 13: ...13 http www tyan com J19 J21 J15 J11 J20 J22...
Страница 15: ...15 http www tyan com JP1 JP9 J28 JP2 JP3 J13...
Страница 17: ...17 http www tyan com J24 J25 J27 JP5 J41...
Страница 19: ...19 http www tyan com JP4 J11 J7 SATA5 SATA4 SATA2 SATA3 SATA0 SATA1 J10...
Страница 82: ...82 http www tyan com NOTE...
