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HP Lto 5 Manual

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Page 121

IndicatesLU_SCOPE.0Scope
Thecharacteristicsofthepersistentreservationcurrentlyheld.Persistentreservationtypessupported
bythedriveare:
Type
Exclusiveaccess
Exclusiveaccess,registrantsonly
Exclusiveaccess,allregistrants
3h
6h
8h
Theamountofdata(inbytes)thatshouldbesenttothedrivefromthehostinparameterlistdata.If
theSPEC_I_PTbitintheparameterdatais0,thisfieldissetto18h.IfSPEC_I_PTis1,thisfield
specifiesthenumberofbytesofparameterdata(minimumis18h).
ParameterList
Length
PERSISTENTRESERVEOUTparameterdata...

Page 122

IdentifiestheI_Tnexusthatsentthecommand.Thevaluemustmatchtheregisteredreservationkey
fortheI_Tnexusexceptfor:
•TheRegisterandIgnoreExistingKeyserviceaction,wherethisfieldisignored.
•TheRegisterserviceactionforanunregisteredI_Tnexus,wherethisfieldis0.
IftheReservationKeydoesnotmatchwiththeoneregisteredinthedeviceserverfortheI_Tnexus,
thedeviceserverreturnsReservationConflict.
ReservationKey
Informationneededforthefollowingserviceactions:Register,RegisterandIgnoreExistingKey,
Preempt,andPreemptandAbort....

Page 123

Additionalparameterdata
01234567
TransportParameterDataLength(n-27)(MSB)24
(LSB)27
TransportIDsList
FirstTransportID(MSB)28
(LSB):
:
LastTransportID(MSB):
(LSB)n
SpecifiesthenumberofbytesofTransportIDstofollow.TheParameterListLengthinthe
CDBcontainsallthebytesspecifiedinTransportParameterDataLength.
TransportParameterData
Length
See“TransportIDs”(page124).TransportIDs
ParameterdatafortheRegisterandMoveserviceaction
01234567
ReservationKey(MSB)0
(LSB)7
ServiceActionReservationKey(MSB)8
(LSB)15...

Page 124

TransportIDs
FibreChannelTransportID
01234567
ProtocolIdentifier(0)Reserved(0)FormatCode(00b)0
Reserved(0)1
7
WorldWidePortName(MSB)8
(LSB)15
Reserved(0)16
23
SASTransportID
01234567
ProtocolIdentifier(6h)Reserved(0)FormatCode(00b)0
Reserved(0)1–3
SASAddress(MSB)4
(LSB)11
Reserved(0)12
23
PREVENT/ALLOWMEDIUMREMOVAL1Eh
PREVENT/ALLOWMEDIUMREMOVALtellsthedrivetoenableordisabletheremovalofthe
cartridge.
Whencartridgeremovalisprevented,thefrontpanelejectbuttoniscompletelydisabled(though...

Page 125

01234567
PreventReserved(0)4
Control5
CDBfields
Mediumremovalisallowedforthedrive00bPrevent
Mediaremovalisprohibitedforthedrive01b
Invalid10b,11b
READ08h
READtransferszeroormoredatablockstothehoststartingatthecurrentlogicalposition.
Pre-executionchecks
DeferredErrorReservationFixedBitIllegalField
DiagnosticStatusMediaAccessUnitAttention
IfboththeSILIandFixedbitsareset,CHECKCONDITIONstatusisreported.Sensedataisas
describedintheIllegalFieldChecks.ThefieldpointersindicatetheFixedbitfield....

Page 126

describedbelow).Thecurrentpositionissetafterthelastblockthatwasreturnedorpartially
returned
SuppressIncorrectLengthIndicatorSILI
Thereadoperationisterminatedwhenthelengthofablock(onthetape)differsfromtheTransfer
Length.TransferLengthbytesofdatawillhavebeentransferred.Thelogicaltapepositionwill
betheEOMsideoftheillegalsizedblock.
0
ThedrivewillnotreportCHECKCONDITIONstatusiftheonlyerroristhattheTransferLength
isnotequaltotheactualblocklengthrecordedonthemedia.
1...

Page 127

READspecificstatus
NotesKeyStatusEvent
ILIandValidbitsareset.Theinformationbyteswillbeset
asfollows:
VariableBlockMode:Thedifferencebetweentherequested
TransferLengthandtheactualblocksize.Iftheblocksize
isbiggerthantheTransferLength,thiswillbenegative(twos
complement).
FixedBlockMode:Thedifferencebetweentherequested
numberofrecordsandthenumberofwholegoodrecords
transferred.Ifthelastrecordwasunderlength,itis
considered“wholegood”forthepurposesofthiscalculation.
NOSENSECHECK
COND’N
SILIerror...

Page 128

Pre-executionchecks
FlagLinkFixedBitIllegalField
DeferredErrorReservationBadLUN
DiagnosticStatusMediaAccessUnitAttention
Commanddescriptorblock
01234567
OperationCode(08h)0
LogicalBlockAddress(MSB)1
(LSB)3
TransferLength4
Control5
CDBfields
Specifiestheblockaddressfromwhichtoread.Thetapedrivewillspacetothisblock
beforereadingdata.
LogicalBlockAddress
Thenumberofblocksofdatatoreturn.EachCD-ROMblockis2048bytesinsize.
Thissizeisautomaticallysetinthemodedata’sfixedblocklengthwhileinCD-ROM
mode....

Page 129

01234567
LogicalBlockAddress(MSB)2
(LSB)5
Reserved(0)6
TransferLength(MSB)7
(LSB)8
Control9
CDBfields
Specifiestheblockaddressfromwhichtoread.Thetapedrivewillspacetothis
blockbeforereadingdata.
LogicalBlockAddress
Thenumberofblocksofdatatoreturn.EachCD-ROMblockis2048bytesin
size.Thissizeisautomaticallysetinthemodedata’sfixedblocklengthwhilein
CD-ROMmode.
TransferLength
READ10specificstatus
Seethe“READspecificstatus”(page127).
READ10residueinformation...

Page 130

01234567
AllocationLength(MSB)10
(LSB)13
Reserved(0)14
Control15
CDBfields
Serviceactionsaredefinedasfollows.ThedatareturnedforeachServiceActionis
describedbelow.
ServiceAction
DescriptionNameCode
Returnstheattributevalues.AttributeValues00h
ReturnsalistofattributeIDsthatareavailable(both
supportedandexistingIDs)
AttributeList01h
Returnsalistofknownvolumenumbers.ForLTOUltrium
drives,thereisonlyasinglevolume,Volume0.
VolumeList02h
Returnsalistofknownpartitionnumbers.ForLTOUltrium...

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