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HP Lto 5 Manual

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							Read-WriteErrorRecoverymodepage
TheRead-WriteErrorRecoverymodepagehasthefollowingformat:
01234567
PageCode{01h}Rsvd(0)PS(0)0
AdditionalPageLength{0Ah}1
DCR(0)DTE(0)PER[0]EER(1)Res(0)TB(0)Reserved(0)2
ReadRetryCount3
Reserved(0)4–7
WriteRetryCount8
Reserved(0)9–11
Read-WriteErrorRecoverypagefields
TransferBlockTB
Alwayssetto0,meaningthatanunrecoverabledatablockwillnotbetransferredto
thehost.
0
EnableEarlyRecoveryEER
Thedriveshouldattempterrorcorrectionbeforeperformingretries.1
PostError.Althoughthisbitischangeable,thedrive’sinternalbehavioralwayscorrespondsto
PER=0.
PER
ThedrivedoesnotreportCHECKCONDITIONforrecoverederrors.TheDTEbitmust
alsobezero.
0
ThedrivereportsCHECKCONDITIONforrecoverederrors.1
DisableTransferonErrorDTE
Alwayssetto0,meaningthatthedrivewillnotterminatethetransferforerrors
recoveredwithinthelimitsestablishedbytheread-writeerrorparameters.
0
DisableCorrectionDCR
Alwayssetto0,meaningthattheuseoferrorcorrectioncodesforerrorrecoveryis
allowed.
0
Thenumberoftimesthedrivewillattemptitsrecoveryalgorithmduringareadoperationbefore
reportinganunrecoverableerror.
ReadRetryCount
Thedrivewillnotuseitsrecoveryalgorithmduringreadoperations.0
Thedrivewillattempt21retries.15h
Thenumberoftimesthedrivewillattemptitsrecoveryalgorithmduringawriteoperationbefore
reportinganunrecoverableerror.
WriteRetryCount
Thedrivewillnotuseitsrecoveryalgorithmduringreadoperations.0
ThevalueforallLTOUltriumdrives,giving10retries.0Ah
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							Disconnect-Reconnectpage
FCdrives
TheDisconnect-ReconnectpagehasthefollowingformatforFCdrives:
01234567
PageCode{02h}Rsvd(0)PS(0)0
AdditionalPageLength{0Eh}1
BufferFullRatio(0)2
BufferEmptyRatio(0)3
BusInactivityLimit(0)(MSB)4
(LSB)5
DisconnectTimeLimit[0](MSB)6
(LSB)7
ConnectTimeLimit(0)(MSB)8
(LSB)9
MaximumBurstSize[0](MSB)10
(LSB)11
Reserved(0)FAC(1)FAB(1)FAA[1]EMDP(0)12
Reserved(0)13–15
Disconnect-Reconnectpagefields
Buffermanagementiscontrolledbythedrive,sothisshouldalwaysbezero.0BufferFullRatio
Buffermanagementiscontrolledbythedrive,sothisshouldalwaysbezero.0ConnectTimeLimit
Thisparameterisnotsupportedandshouldbezero.0BusInactivityLimit
Thisparameterisnotsupportedandshouldbezero.0DisconnectTimeLimit
Thisparameterisnotsupportedandshouldbezero.0ConnectTimeLimit
Themaximumamountofdatathatwillbetransferredduringadata-inordata-out
phasebeforedisconnecting.Thisfieldisinunitsof512bytes.Themaximumburst
sizethatthedrivesupportsis127(7Fh)blocksof512bytes,thatis,64KBless
512bytes.
>0MaximumBurstSize
Thedrivemaysendburstsofanysize.Thisisthedefaultvalue.0
EnableModifyDataPointersisnotfacilitatedbythedrive.Thedrivewillalways
havecontinuallyincreasingandcontiguousdatarelativeoffsetvaluesforFCP_DATA.
0EMDP
Thisbit,togetherwithFABandFAC,indicatewhetherthedrivewillusefairnessarbitration
tosendframestotheinitiator.
FAA
ThedrivewillnotusefairnesswhenarbitratingtosendFCP_DATAframes.0
ThedrivewillusefairnesswhenarbitratingtosendFCP_DATAframes.1
ThedrivewillusefairnesswhenarbitratingtosendFCP_XFER_RDYframes.1FAB
ThedrivewillusefairnesswhenarbitratingtosendanFCP_RSPframe.1FAC
92Commands

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							SASdrives
TheDisconnect-ReconnectpagehasthefollowingformatforSASdrives:
01234567
PageCode{02h}Rsvd(0)PS(0)0
AdditionalPageLength{0Eh}1
Reserved(0)2–3
BusInactivityTimeLimit[1](MSB)4
(LSB)5
Reserved(0)6–7
MaximumConnectTimeLimit[0](MSB)8
(LSB)9
MaximumBurstSize[0](MSB)10
(LSB)11
Reserved(0)12–13
FirstBurstSize(0)(MSB)14
(LSB)15
Disconnect-Reconnectpagefields
Themaximumtime,in100μSunits,thedrivewillkeepaSSPconnectionopenwithout
transmittingaSSPframe.
BusInactivityTimeLimit
Theconnectionwillbekeptopenindefinitely.0
Themaximumtime,in100μSunits,thedrivewillkeepaSSPconnectionopenMaximumConnectTime
LimitThereisnotimelimit.0
Themaximumamountofdata,in512byteunits,thatwillbetransferredbythedriveina
singleSSPconnection.
MaximumBurstSize
Thedrivewilldeterminethemaximumamountofdatatotransferinasingle
connection.
0
Thisfeatureisnotsupportedandmustbeleftat0.0FirstBurstSize
Controlmodepage
TheControlmodepageisdefinedasfollows:
01234567
PageCode{0Ah}SPF(0)PS(0)0
PageLength{0Ah}1
RLEC(0)GLTSD(0)D_SENSERsvd(0)TMF_ONLY(0)TST2
ObsoleteQErr(0)Rsvd(0)QueueAlgorithmModifier(0)3
ObsoleteSWP(0)UAInterlockCntrl(0)RAC(0)Rsvd(0)4
AutoloadModeReserved(0)TAS(1)ATO(0)5
Obsolete6–7
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							01234567
BusyTimeoutPeriod(0)(MSB)8
(LSB)9
ExtendedSelf-TestCompletionTimeout(0)(MSB)10
(LSB)11
Controlmodepagefields
Fixedformatsensedatawillbereturnedintheauto-sensesensedata.0D_SENSE
Descriptorformatsensedatawillbereturnedinauto-sensesensedata.1
TheTaskSetType.1TST
Ifacartridgeisinserted,thedrivepullsitinandthreadsthetapesothatprimary
accessisallowed.
0AutoloadMode
Whenacartridgeisinserted,thedrivepullsitinbutdoesnotthreadthetape.Inthis
position,onlytheCartridgeMemoryisaccessible.
1or2
Allothervaluesareinvalid.
ControlExtensionsub-page
01234567
PageCode(0Ah)SPF(1)PS(0)0
Sub-pageCode(01h)1
PageLength(1Ch)(MSB)2
(LSB)3
IALUAE(1)SCSIPTCMOSReserved(0)4
InitialPriority(0)Reserved(0)5
Reserved(0)6
TimestampChangeablebyMethodsOutsideT10StandardsTCMOS
ThetimestampcannotbechangedbytheDeviceTimeModePage(3Ch).0
ThetimestampmaybeinitializedusingtheDeviceTimeModePage.1
SCSIPrecedenceSCSIP
TheDeviceTimeModePage(3Ch)canchangethetimestampandtheSETTIMESTAMP
commandisillegal.
0
AtimestampchangedusingaSETTIMESTAMPcommandtakesprecedenceoverthe
DeviceTimeModePage.
1
ImplicitAsymmetricLogicalUnitAccessEnabledIALUAE
94Commands

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							DataCompressionCharacteristicspage
TheDataCompressionCharacteristicsmodepageisdefinedasfollows:
01234567
PageCode{0Fh}0
PageLength{0Eh}1
Reserved(0)DCC(1)DCE[1]2
Reserved(0)RED(0)DDE(1)3
CompressionAlgorithm(1)(MSB)4
(LSB)7
DecompressionAlgorithm(1)(MSB)8
(LSB)11
Reserved(0)12
15
DataCompressionCharacteristicsmodepagefields
DataCompressionEnable.Thisbitcontrolswhetherthedriveusescompressionwhen
writing.Thevaluehasnomeaningwhenreading,thatis,ifthetapecontainscompressed
data,decompressionwilloccurregardlessofthesettingofthisbit.Thebitisanalogous
totheSelectDataCompressionAlgorithmfieldontheDeviceConfigurationmodepage
(see“Changeableparameters”(page96)).
DCE
Compressionisdisabled
Compressionisenabled
0
1
DataCompressionCapable:Readonly.Itwillhavethevalueof1,indicatingthat
compressionissupported.
DCC
DataDecompressionEnable:Readonly.Itwillhavethevalueof1,indicatingthat
compressionisenabled.
DDE
ReportExceptiononDecompression:Readonly.Itwillhavethevalue0,meaningthat
thedrivereturnsCHECKCONDITIONstatuswhenitencountersdatathatcannotbe
decompressed.Thisapplieswhendatahasbeencompressedwithanunknownor
unsupportedcompressionalgorithm.
RED
Thisindicateswhichcompressionalgorithmwillbeusedtoprocessdatafromthehost
whentheDCEbitissettoone.Ifthehostselectsanalgorithmwhichthedrivedoesnot
support,CHECKCONDITIONisreturned,withasensekeyofILLEGALREQUEST.Only
thedefaultalgorithm(ID1)issupported.
CompressionAlgorithm
Thiswillalsoalwaysbe1,indicatingthatthedefaultdecompressionalgorithmshould
beused.
DecompressionAlgorithm
DeviceConfigurationpage
ThedrivesupportstheDeviceConfigurationpage,whichhasthefollowingformat:
01234567
PageCode{10h}Rsvd(0)PS(0)0
AdditionalPageLength(0Eh)1
ActiveFormat(0)CAF(0)ObsoleteRsvd(0)2
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							01234567
ActivePartition3
WriteBufferFullRatio(0)4
ReadBufferEmptyRatio(0)5
WriteDelayTime:012Ch(MSB)6
(LSB)7
REW(0)RBO(0)SOCF(00)AVC(1)RSmk(0)BIS(1)DBR(0)8
GapSize(0)9
BAM(0)BAML(0)SWP(0)SEW[0]EEG(1)EODDefined(000)10
BufferSizeatEarlyWarning(0)(MSB)11
(LSB)13
SelectDataCompressionAlgorithm[1]14
PRMWP(0)PERSWP(0)ASOCWP
(0)RewindonReset[0]OIR[0]WTRE[0]15
Pre-executionchecks
TheonlycheckmadewhenthispageissentinModeSelectdataisParameterList.
Changeableparameters
Thepartitioninwhichthecurrentlogicalpositionlies.ActivePartition
Thedrivewillneverflushbuffereddatatotapeasaresultofatime-out.0WriteDelay
TimeThetimein100msincrementsthatthedriveshouldwaitwithunwrittendatainthebufferand
noactivityontheinterfacebeforeforcingdatatotape.Thedelayistimedfromthecompletion
oftheprecedingWriteorWriteFilemarkscommand.Thedefaultvalueis12Ch,which
translatestoawritedelayof30s.
>0
SynchronizeatEarlyWarningflagSEW
DonotsynchronizeatEarlyWarning(default)—thedrivemaybufferalllogicalobjectswhen
positionedbetweenEWandEOT.
0
SynchronizeatEarlyWarning—thedriveflushesalllogicalobjectstotapebeforereturning
statuswhenpositionedbetweenEWandEOT.
1
UseScheme2oftheLTO-DCalgorithm(pass-throughmode).Notethatclearingthisparameter
isnotadvised.
0SelectData
Compression
AlgorithmUsethedefaultcompressionscheme.Thisisthedefault.1
Sameas10b.00bWTRE
Thedeviceserverwillcompleteavalidlocate,read,space,orverifyoperationwithGOOD
statusevenifthedeviceserverdetectscompromiseddatastoredontheWORMtape.
01b
ThedeviceserverreturnsCHECKCONDITIONinresponsetoalocate,read,space,orverify
operationifthedevicedetectscompromiseddataontheWORMtape.Thesensekeyis
MEDIUMERROR,withadditionalsenseof300Dh(WORMmedium—integritycheckfailed).
Thishasnoeffectonthecompletionofavalidlocate,read,space,orverifyoperationwhen
thedevicecontainsanon-WORMtape.
10b
Reserved.11b
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							ThedeviceserveronlyprocessescommandsfromanI_Tnexusifthelogicalunitholdsa
(persistent)reservation.Ifitisnotreserved,thecommandreturnsCHECKCONDITIONwith
asensekeyofILLEGALREQUESTandadditionalsenseof2C0Bh(notreserved).Notethat
somecommandsarealwaysallowed.
1OIR
TheRewindonResetfunctionalityisdefinedaspositioningtoBOPinPartition0,regardlessofthe
partitionactiveatthetimethattheresetoccurred.
Rewindon
Reset
ALogicalUnitResetdoesnotalterthelogicalposition.00b
ALogicalUnitResetwillcausethetapetoberewoundtoBOPforPartition0.01b
ALogicalUnitResetdoesnotalterthelogicalposition.10b
Reserved11b
Unchangeableparameters
0PS
TheChangeActiveFormatflagshouldbezerosincechangingformatsisnotsupported.0CAF
Changingformatsisnotsupported.0ActiveFormat
Buffermanagementisdonebythedrive.0WriteBufferFull
Ratio
Buffermanagementisdonebythedrive.0ReadBufferEmpty
Ratio
TheDataBufferRecoveryflagshouldbeclearsincethisfeatureisnotsupported.0DBR
TheBlockIdentifiersSupportedflagshouldbesetsinceblockidentifiersaresupported.1BIS
TheReportSetMarksflagshouldbeclearsincethisfeatureisnotsupported.0Rsmk
TheAutomaticVelocityControlflagshouldbeclearsincevelocitycontrolismanagedby
thedrive.
0AVC
TheStopOnConsecutiveFilemarksflagshouldbeclearsincethisfeatureisnotsupported.0SOCF
TheRecoverBufferOrderflagshouldbeclearsincethisfeatureisnotsupported.0RBO
TheReportEarlyWarningonreadflagshouldbeclearsincethisfeatureisnotsupported.0REW
Thereisnoconceptofinter-blockgapsintheformat.0GapSize
0EOCDefined
TheEnableEODGenerationflagshouldbesetsinceEODgenerationisalwaysenabled.0EEG
TheBufferSizeatEarlyWarningfieldshouldbezeroasthiscannotbeset.0BufferSizeatEarly
Warning
DeviceConfigurationExtensionmodepagesubpage
01234567
PageCode(10h)SPF(1)PS(0)0
SubpageCode(01h)1
PageLength(1Ch)2
3
TAPSLD[0]TARCP[0]TASER[1]TARPF[1]Reserved(0)4
ShortEraseMode(02h)Reserved(0)5
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							01234567
Reserved(0)6
31
TapeAlertRespectParameterFieldsTARPF
ThedeviceserverignoresthePPCandParameterPointerfieldsandallTapeAlert
parametersarereported.
0
ThedeviceserverreportsparametervaluesusingthevaluespecifiedinthePPCand
ParameterPointerfieldsoftheLOGSENSEcommandfortheTapeAlertlogpage.
0
ActivationofaTapeAlertflagresultsinaninformationalexceptioncondition.0TASER
ActivationofaTapeAlertflagdoesnotresultinaninformationalexceptioncondition.1
TapeAlertRespectPageControlTARCP
ThePCfieldisignoredandthevaluesreturnedwillalwaysbethecumulativevalues.0
ThedeviceserverreportsparametervaluesusingthevaluespecifiedinthePCfieldofthe
LOGSENSEcommandfortheTapeAlertlogpage.
1
TapeAlertPreventLogSenseDeactivationRsmk
ProcessingaLOGSENSEcommandfortheTapeAlertlogpageclearsallTapeAlertflags.0
Theflagsarenotcleared.1
SpecifiestheactiontobetakenwhenreceivinganERASEcommandwiththeLongbitsettozero.ShortEraseMode
ThedeviceserverrecordsanEODindicationatthespecifiedlocationonthemedium.02h
MediumPartitionsmodepage
TheMediumPartitionsmodepagehasthefollowingformat.
ExecutingMODESELECTwhenincompatiblemediaisloaded(suchasLTO5WORMorLTO4)
willresultinCHECKCONDITIONstatuswithasensekeyofILLEGALREQUESTandadditional
sense2600h(invalidfieldinparameterlist).
01234567
PageCode(11h)SPF(0)PS(0)0
PageLength1
MaximumAdditionalPartitions2
AdditionalPartitionsDefined3
ADDP(0)CLEAR(0)POFM(1)PSUM(11b)IDPSDPFDP4
MediumFormatRecognition(3)5
PartitionUnits(9)Reserved(0)6
Reserved(0)7
PartitionSize(MSB)8
(LSB)9
::
PartitionSize(n–1)–
n
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							Theminimumvalueis08h.ItreflectshowmanyPartitionSizedescriptorsarespecified.
Partition-incapablecartridgeswillreportonlyonePartitionSizedescriptor.
PageLength
0forpartition-incapablecartridges.Otherwise,itissettothemaximumnumberofadditional
partitionssupportedbythedrive-cartridgecombination.ForLTO5cartridges,itissetto01h.
MaximumAdditional
Partitions
ForMODESELECT,thenumberofadditionalpartitionstobecreated.
ForMODESENSE,thenumberofadditionalpartitionsinthecartridge.
See“Specifyingpartitionsizes”below.
AdditionalPartitions
Defined
FixedDataPartitions.Partitionswillbecreatedaccordingtothedrive'sdefaultvalues.Foran
LTO5drive-cartridgecombination,Partition0sizeis1425GB,andPartition1is37.5GB.If
thisbitisset,thenSDPandIDPmustbe0.
See“Specifyingpartitionsizes”below.
FDP
SelectDataPartition.PartitionsarecreateduptothenumberspecifiedintheAdditionalPartitions
Definedfield.Theirsizesarechosenbythedrive.ForanLTO5drive-cartridgecombination,
ifonepartitioniscreated,thesizeis1.5TB.Iftwopartitionsarecreated,Partition0sizeis
750GB,andPartition1is712.5GB.Ifthisbitisset,FDPandIDPmustbe0.
See“Specifyingpartitionsizes”below.
SDP
Initiator-definedDataPartitions.Partitionsarecreateduptothenumberspecifiedinthe
AdditionalPartitionsDefinedfield.ThepartitionsizesarespecifiedinthePartitionSize
descriptors.Ifthisbitisset,thenFDPandSDPmustbe0.ThisbitisalwayssetforMODE
SENSEafteraFORMATMEDIUMcommandhasbeenexecutedsuccessfully.
See“Specifyingpartitionsizes”below.
IDP
PartitionSizeUnitofMeasure:Thevalueof11bindicatesthattheunitsof
measureforthePartitionSizedescriptoraredefinedbythePartitionsUnitsfield:
10(PartitionUnits)bytes.
3PSUM
PartitionsonFormatMedium.ThedrivesupportstheFORMATMEDIUMcommand
throughwhichthetapecanbepartitioned.
ForMODESELECT,thePOFMbitmustbesetto1sincepartitionconfiguration
isonlysupportedviatheFORMATMEDIUMcommand.IfthePOFMbitissetto
0,thecommandwillbeterminatedwithCHECKCONDITION,sensekeyof
ILLEGALREQUEST,andadditionalsense2600h(invalidfieldinparameterlist).
1POFM
SettozeroindicatingSCSI-2compatibility.0CLEAR
SettozeroindicatingSCSI-2compatibility.0ADDP
Thisindicatesthatthedriveiscapableofformatandpartitionrecognition.3MediumFormat
recognition
PartitionSizeUnitofMeasure:Thevalueof11bindicatesthattheunitsof
measureforthePartitionSizedescriptoraredefinedbythePartitionsUnitsfield:
10(PartitionUnits)bytes.
3PSUM
ThisdefinestheunitsofthePartitionSizefieldas109bytes,inotherwordsin
gigabytes.
9PartitionUnits
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							ForMODESELECT,thevalueinthisfieldmustbemultipleof37.5GB.IfFFFFhisreceivedfor
onepartition,themaximumremainingcapacityisassignedtothatpartitionafterallocating
thespecifiedcapacityfortheotherpartition,ifthereisone.See“Specifyingpartitionsizes”
below.
NOTE:Theremustbeaphysicalgapbetweenpartitions,a“guardarea”,whereno
writing/readingisallowed.Thisamountstoalossof37.5GBintotalcapacity.Asaresult,
thesumofthevaluesspecifiedinthePartitionSizedescriptorsplus37.5isroughlyequalto
themaximumcapacityofthecartridge.
ForMODESENSE,thefollowingaresomeofthevaluesthatmaybereturned.
NOTE:
ThepartitionsizeswillbescaledapproriatelyifaSETCAPACITYcommandexecutedpreviously.
PartitionSize
TapeTypePartition
Size
LTO-3tapeloaded

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