HP Lto 5 Manual

01234567
Reserved(0)6
TargetPortCount(1)7
Reserved(0)8
9
RelativePortIdentifier(0)10
11
Port001hRelativePortIdentifier
Port102h
REPORTTIMESTAMPA3h(0Fh)
TheREPORTTIMESTAMPcommandrequeststhedeviceservertoreturnthevalueofthelogical
unit’stimestamp.
Pre-executionchecks
UnitAttentionDeferredErrorReservationIllegalField
Commanddescriptorblock
01234567
OperationCode(A3h)0
ServiceAction(0Fh)Reserved(0)1
Reserved(0)2–5
AllocationLength6
9
Reserved(0)10
Control11
CDBfields...

01234567
Timestamp4
9
Reserved(0)10–11
Thedrivewillreturnuptothisnumberofbytes,truncatinganyparameterdataasnecessary.TimestampParameter
DataLength
Timestampinitializedtozeroatpower-onastheresultofahardreset.000bTimestampOrigin
Reserved001b
TimestampinitializedbytheSETTIMESTAMPcommand.010b
TimestampinitializedbytheDeviceTimemodepage(3Ch).011b
Reserved100b–111b
Thecurrentvalueofthetimestamp(thenumberofmillisecondsthathaveelapsedsincemidnight,
1January1970UT).
Timestamp
REQUESTSENSE03h...

01234567
AllocationLength4
Control5
CDBfields
Thisfieldisignored.LUN
FixedFormatsensedatawillbereturned.0DESC
DescriptorFormatsensedatawillbereturned.1
Nodataistransferredtothehost.0Allocation
LengthThemaximumamountofsensedatainbytesthatshouldbetransferredtothehost.Thedrive
returnsuptoAllocationLengthbytesofdata;anyextrasensedataislost.
>0
REQUESTSENSEdata
SensedataisrecoveredfromthedrivebymeansofaREQUESTSENSEcommandfollowingthe
reportingofCHECKCONDITIONbythedrive.Therearetwoformatsinwhichthedatacanbe...

ReturnedSensedatafields
IndicatesthattheinformationbytescontainvalidinformationasdefinedintheSCSI
specification.
1Valid
Indicatesthattheerroriscurrent,thatis,itisassociatedwiththecommandforwhich
CHECKCONDITIONstatushasbeenreported.
70hErrorCode
Indicatesthattheerrorisdeferred.Adeferrederroroccurswhenthereisafailurefor
anoperationthathasalreadybeenterminatedwithaGOODstatus,orwhenfailure
occursin“cleanup”activityfollowinganoperationthatwasterminatedbyBUS...

IfSKSV=1,theinterpretationofthisfielddependsonthesensekeyreported.ForSenseKey
=5(ILLEGALREQUEST),thisfieldrepresentstheFieldPointer,identifyinginwhichbyteofthe
commanddescriptororparameterlistanerrorwasdetected.
Notethatthedrivescansfrombyte0bit7ofacommandorparameterlistthroughtobyten
bit0.Thefieldandbitpointersaresettopointtothemostsignificantbitofthefieldthatisin
error.Seetheillegalfieldcheckandtheparameterlistcheck.
ForSenseKey=0(NOSENSE)or2(NOTREADY),thisfieldrepresentstheProgressIndication,...

Thenumberofadditionalsensebytestofollow,≤244.Itisnevertruncatedtoreflecttheactual
TransferLength.
AdditionalSense
Length
AdditionalinformationaboutthecauseoftheCHECKCONDITION,orthecurrenttapeposition
whentheREQUESTSENSEisunsolicited.See“AdditionalSensecodes”(page191).
AdditionalSense
CodeandQualifier
Atleastonedescriptorissent(DriveErrorCode),theothersmayormaynotbesentdepending
onthenatureoftheCHECKCONDITION.
SenseData
Descriptor
InformationSensedatadescriptor
01234567
DescriptorType(00h)0...

Thepercentcompleteindicationinwhichthereturnedvalueisanumeratorthathas65,536
(10000h)asitsdenominator.Theprogressindicationisbasedonthetotaloperation.
ProcessIndication
StreamCommandsSensedatadescriptor
01234567
DescriptorType(04h)0
AdditionalLength(02h)1
Reserved(0)2–3
Reserved(0)ILIEOMMark4
DriveErrorCodeSensedatadescriptor(VendorSpecific)
01234567
DescriptorType(80h)0
AdditionalLength(02h)1
Reserved(0)2–3
Reserved(0)ILIEOMMark4
DriveErrorCode4
11
CleaningNeededSensedatadescriptor(VendorSpecific)...

•Ifthecurrentcommandfails,senseissetaccordingtothefailureandCHECKCONDITION
isreportedtothehostthatsentthecommand.
•Ifthecommandfailsitspre-executioncheckforUnitAttention,UNITATTENTIONsenseis
copiedtotheCurrentsense,andCHECKCONDITIONisreportedtothehostthatsentthe
command.
•Ifthecommandfailsitspre-executioncheckforDeferredError,DEFERREDERRORsenseis
copiedtotheCurrentsense,andCHECKCONDITIONisreportedtothehostthatsentthe
command.
Clearingcurrentsense...

DEFERREDERRORsense
DEFERREDERRORsenseisgeneratedwhenanoperationfailsandCHECKCONDITIONstatus
cannotbereportedtothehostforoneofthefollowingreasons:
•Theoperationhadimmediate-reporton(forexample,REWINDwiththeImmedbitset,or
LOAD).
•Theoperationwasawritethatwasimmediate-reportedonafteritsdatawassuccessfully
placedinthewrite-behindqueue.
•Theoperationwasabandonedwithoutstatus(thatis,anSASorFCconnectionwasclosed)
afterwhatthedriveperceivedwasacatastrophicerrororwhenanerroroccurredfollowing...

thathasjustbeenexperiencedfalls.Foraclearerindicationofthenatureoftheproblem,referto
theadditionalsensecode.
ASC/QsDescriptionNameCode
0000h,0001h,
0002h,0004h,
0016h,0018h,
0019h,001Ah,8282h
Thereisnorealproblem.Thesenseinformationis
probablyindicatingsomecondition(suchas
encounteringafilemark).
NOSENSE0h
3700h,5D00h,5DFFhReturnedifaModeSelectparameteristruncatedor
ifaTapeAlerteventisbeingreported.
RECOVEREDERROR1h
0400h–0402h,0409h,
040Ch,0412h,
0B01h,3003h,
3A00h,3A04h,3E00h...