Dil ID: 12
Dil Adı: portugal
Dil Kodu: pt6tayfun Produtos da Marca Dell
Dünyanın En Büyük
Elektronik Bilgi Kütüphanesi



Page7
Oncetheoperatingsystemisinstalled,youcaninstallapplicationsandusethesystemnormallywithafewcaveats.
Thereareapplicationsthatmaytrytointeractwiththeharddrivedirectly(imagingtools)thesemaynotworkas
expected.Dellrecommendsthatyoucontactyourapplication
vendorsforallmissioncriticalapplicationsto
ensuretheyworkintheUEFIenvironment.
Limitations
ThissectionexplainspotentialproblemswhichmayoccurwhileinstallingaUEFIawareoperatingsystemandhow
toavoidthem.
LargeOperatingSystemPartitions
Anoperatingsysteminstallerreliesondiskcontrollerfirmwaretoperformdiskread/writefunctionspriortothe
diskdriverisavailable.Certainlegacydiskcontrollersuseolder
firmware(suchasInterrupt0x13handlers)to
executeread/writefunctionsinUEFImodeanddonotprovidenativeaccessdisksinUEFImode.TheUEFIlayer
providestheabstractiondrivertoaccessthedisksusingtheoldfirmware.Themostnotablerestrictionisthatthe
legacyinterrupt0x13functionsare
unabletoaccesslogicalblockaddresseshigherthan2terabytes(TB).Forthis
reason,Dellstronglyrecommendsusingapartitionorvirtualdisksmallerthan2TBforthepartitionwherethe
operatingsystemresides.Failuretouseapartitionsizeoflessthan2TBfortheoperatingsystemvirtualdiskmay
causeundesiredbehaviorandwilleliminatetheinherentGPTpartitionredundancy.Datapartitions(nonsystem
partitions)canbelargerthan 2TBsincethediskdriverisavailablewhentheoperatingsystemaccessesthese
partitions.
ThirdPartyImagingUtilities
UEFIusesapartitioningschemeknownasaGPT.Thisschemeassigns
aGloballyUniqueIdentifier(GUID)toeach
partitioninadisk.Beawarethatimagingutilities(suchasNortonGhost)needtorecreatetheGPTinorderto
haveuniqueGUIDsforpartitionswhicharecopiedfromonedisktoanother.Otherwisedifferentdiskswillusethe
sameGUIDfor
multiplepartitions,whichmaycauseconflictsforsoftwarewhichusestheGUIDstodistinguisheach
partition.
TransferringHardDisks
UEFIBootOptionsarestoredinnonvolatilememoryonasystem.Whenanoperatingsysteminstallerexecutes,it
createsabootoptionfortheoperatingsysteminthesystem’snon
volatilememory.Iftheharddiskwhich
containstheoperatingsystemisremovedandtransferredtoanothersystem,thisnewsystemwillnothavethe
bootoptioninitsnonvolatilememory,andauserwillnotbeabletoboottotheoperatingsystem.
Dellhasaddressedthisproblemby
keepingacopyoftheoperatingsystembootoptionontheharddiskwiththe
operatingsystem.WhentheharddiskistransferredtoanotherDellsystem,thesystemusesthecopyofthe
operatingsystembootoptiontocreateabootoptioninitsnonvolatilememory.Thisallows
ausertoboottothe
operatingsystem.Theprocessisautomatic;nouserinteractionisnecessarytocreatethebootoptiononthe
secondsystem.
UEFILegacyBootControllers
TheUEFIlayerprovidestheabstractiondrivertoaccessthedisksusingtheinterrupt0x13functions.Thefollowing
DellUEFILegacybootcontrollersoperateusinglegacyabstractionsupportedinUEFImode:
DellPERC6/i
DellSAS6/iR
FuturecontrollerswillprovidenativeUEFIdrivers.