ISO 18943:2014 画像素材—画像の保存に使用される磁気ハードドライブ—お手入れと取り扱い | ページ 5

2.1

advanced technology attachment

ATA

type of protocol that interfaces the hard disk drive with the computer

Note 1 to entry: Also, see SATA.

2.2

backup

duplicate of stored data

Note 1 to entry: It is recommended to store the back-ups at a remote site in case of a disaster.

2.3

BLER

number of erroneous blocks per second measured at the input of the C1 decoder (see ISO/IEC 60908) during playback at the standard (x 1) data rate averaged over a 10 second measuring period

Note 1 to entry: Standards ISO/IEC 10149 and ANSI/NAPM IT9.21-1996 specify a maximum BLER rate of 220.

2.4

cartridge

housing for recording media

Note 1 to entry: Cartridges for removable HDDs contain only the disk and not the read/write heads or interface electronics.

2.5

disk array

multiple HDDs with a common controller and file system

2.6

disk format

structure and composition of data storage on a disk

2.7

enterprise storage

ES HDDs

HDDs intended for data center storage systems with higher performance and reliability, and usually running at higher rotational speed

Note 1 to entry: These cost more than consumer HDDs, but are subjected to additional testing at the factory.

2.8

extended-term storage conditions.

storage conditions suitable for the preservation of recorded information having permanent value

2.9

fibre channel

FC

hard drive electrical-optical interconnect allowing high performance data transfer speed

2.10

file

encapsulation of data and metadata

2.11

file format

structure and composition of data and its associated metadata in a file

2.12

hard disk

writable computer storage medium consisting of an aluminum alloy platter coated with a magnetic material and a protective layer

2.13

hard disk drive

HDD

electromechanical device consisting of one or more magnetic disks (platters), read & write heads, a motor, and control electronics usually contained within an enclosure and used to store data

Note 1 to entry: Also commonly referred to as hard drives or disk drives.

2.14

integrated development environment

IDE

software application that provides comprehensive facilities to computer programmers for software development

2.15

massive array of idle disks

MAID

disk array consisting of HDDs that are normally inactive but can be powered up quickly on demand

Note 1 to entry: These HDDs can be configured as a RAID system with the data written on more than one HDD.

2.16

media

any physical material that stores data

2.17

migration

copying of data from one storage medium to another

2.18

mirrored HDDs

data storage configuration in which identical data is stored on two or more HDDs

2.19

parallel advanced technology attachment

PATA

parallel HDD interconnect protocol

Note 1 to entry: See SATA.

2.20

parity

disk management configuration which stores error correction information (checksums) on a dedicated disk for the purpose of automatic data recovery

2.21

redundant array of independent disks

RAID

disk array that employs two or more drives in combination for fault tolerance and performance

Note 1 to entry: The HDDs are always spinning and data can be written over several HDDs. There are several RAID levels, with increasing performance per level (noted below). Levels 1 – 5 still maintain a risk of total data loss.

Note 2 to entry: See the Appendix for the description of each RAID level.

2.22

reformat

copying of data file or files from one file format to another file format

2.23

refresh

copying of data files without change in file format or medium

2.24

serial advanced technology attachment

SATA

HDD interconnect protocol that is faster than parallel (PATA)

Note 1 to entry: Also see ATA.

2.25

server

computer system that provides data and software to one or more computers on a network

2.26

small computer system interface

SCSI

HDD data transfer and control protocol that allows high speed data transfer between a computer/workstation and peripherals.

Note 1 to entry: SCSI is a common interface for enterprise HDDs.

2.27

smart monitoring and reporting technology

SMART

standard diagnostic protocol built into HDDs and used to monitor the operating condition of a HDD or HDDs and report potential problems to the user

2.28

striping

segmentation of logically sequential data, such as a single file, so that segments can be assigned to multiple HDDs