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HP Lto 5 Manual

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Page 91

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...

Page 92

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...

Page 93

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...

Page 94

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...

Page 95

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...

Page 96

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...

Page 97

ThedeviceserveronlyprocessescommandsfromanI_Tnexusifthelogicalunitholdsa
(persistent)reservation.Ifitisnotreserved,thecommandreturnsCHECKCONDITIONwith
asensekeyofILLEGALREQUESTandadditionalsenseof2C0Bh(notreserved).Notethat
somecommandsarealwaysallowed.
1OIR
TheRewindonResetfunctionalityisdefinedaspositioningtoBOPinPartition0,regardlessofthe
partitionactiveatthetimethattheresetoccurred.
Rewindon
Reset
ALogicalUnitResetdoesnotalterthelogicalposition.00b...

Page 98

01234567
Reserved(0)6
31
TapeAlertRespectParameterFieldsTARPF
ThedeviceserverignoresthePPCandParameterPointerfieldsandallTapeAlert
parametersarereported.
0
ThedeviceserverreportsparametervaluesusingthevaluespecifiedinthePPCand
ParameterPointerfieldsoftheLOGSENSEcommandfortheTapeAlertlogpage.
0
ActivationofaTapeAlertflagresultsinaninformationalexceptioncondition.0TASER
ActivationofaTapeAlertflagdoesnotresultinaninformationalexceptioncondition.1
TapeAlertRespectPageControlTARCP...

Page 99

Theminimumvalueis08h.ItreflectshowmanyPartitionSizedescriptorsarespecified.
Partition-incapablecartridgeswillreportonlyonePartitionSizedescriptor.
PageLength
0forpartition-incapablecartridges.Otherwise,itissettothemaximumnumberofadditional
partitionssupportedbythedrive-cartridgecombination.ForLTO5cartridges,itissetto01h.
MaximumAdditional
Partitions
ForMODESELECT,thenumberofadditionalpartitionstobecreated.
ForMODESENSE,thenumberofadditionalpartitionsinthecartridge.
See“Specifyingpartitionsizes”below....

Page 100

ForMODESELECT,thevalueinthisfieldmustbemultipleof37.5GB.IfFFFFhisreceivedfor
onepartition,themaximumremainingcapacityisassignedtothatpartitionafterallocating
thespecifiedcapacityfortheotherpartition,ifthereisone.See“Specifyingpartitionsizes”
below.
NOTE:Theremustbeaphysicalgapbetweenpartitions,a“guardarea”,whereno
writing/readingisallowed.Thisamountstoalossof37.5GBintotalcapacity.Asaresult,
thesumofthevaluesspecifiedinthePartitionSizedescriptorsplus37.5isroughlyequalto
themaximumcapacityofthecartridge....

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