Dell PowerVault MD1120 Hardware Owner's Manual

Also see for PowerVault MD1120: Optimization guide Getting started guide Information update Setup guide Getting started guide

Contents

64 Glossarypartition — You can divide a physical disk into multiple physical sections calledpartitions with the fdisk command. Each partition can contain multiple logicalphysical disks. You must format each logical disk with the format command.PCI — Peripheral Component Interconnect. A standard for local-busimplementation.PDU — Power distribution unit. A power source with multiple power outlets thatprovides electrical power to servers and storage systems in a rack.peripheral — An internal or external device, such as a physical disk or keyboard,connected to a system.PGA — Pin grid array. A type of processor socket that allows you to remove theprocessor chip.pixel — A single point on a video display. Pixels are arranged in rows and columns tocreate an image. A video resolution, such as 640 x 480, is expressed as the number ofpixels across by the number of pixels up and down.physical disk — A hard drive installed in the RAID enclosure.POST — Power-on self-test. Before the operating system loads when you turn on yoursystem, the POST tests various system components such as RAM and physical disks.processor — The primary computational chip inside the system that controls theinterpretation and execution of arithmetic and logic functions. Software written forone processor must usually be revised to run on another processor. CPU is a synonymfor processor.protected mode — An operating mode that allows operating systems to implement:• A memory address space of 16 MB to 4 GB• Multitasking• Virtual memory, a method for increasing addressable memory by using the physicaldiskThe Windows 2000 and UNIX® 32-bit operating systems run in protected mode. MS-DOS cannot run in protected mode.PS/2 — Personal System/2.