Backup device

Overview

Backupdevicesaresometimesreferredtoas"backupdevices"forshort.

Backupdevicescanbedividedinto"hotstandby"and"coldstandby".Hotstandbyreferstoco-operationwiththetargetdevice.Whenthetargetdevicefailsorshutsdown,thehotstandbydeviceimmediatelyassumesthetaskofthefaileddevice;coldstandbymeansthatthecoldstandbydevicestartstobeusedwhenthetargetdevicefailsorshutsdown.Theshutdownwaitingstateentersthestart-upoperationstateandassumesthetaskofmalfunctioningequipment.

Classification

Backupequipmentcanbedividedintosystembackupanddatabackup.

Systembackup

referstothelossofsystemfilescausedbytheuser'soperatingsystemduetodiskdamageordamage,computervirusesorhumanerrordeletion,whichcausesthecomputeroperatingsystemtofailtobootnormallyTherefore,thesystembackupisusedtostoretheoperatingsysteminadvanceforbackupsupportafterafailure.

Databackup

Itmeansthatusersstoredata,includingfiles,databases,applications,etc.,fordatarecovery.Backupisthebasisofdisasterrecovery.Itreferstotheprocessofcopyingallorpartofthedatacollectionfromtheharddiskorarrayoftheapplicationhosttootherstoragemediainordertopreventthesystemfromoperatingerrorsorsystemfailurescausingdataloss.Traditionaldatabackupmainlyusesbuilt-inorexternaltapedrivesforcoldbackup.However,thismethodcanonlypreventman-madefailuressuchasoperatingerrors,anditsrecoverytimeisalsoverylong.Withthecontinuousdevelopmentoftechnologyandthemassiveincreaseofdata,manyenterpriseshavebeguntoadoptnetworkbackup.Networkbackupisgenerallyachievedthroughprofessionaldatastoragemanagementsoftwarecombinedwithcorrespondinghardwareandstoragedevices.

Related Articles
TOP