HP Lto 5 Manual

							01234567
ParameterLength(MSB)12
(LSB)13
Reserved(0)14
Control15
CDBfields
TheCodefieldindicateswhatistobespacedto:Code
Blocks—ThenumberofblockscrossedisdictatedbyCount.000
Filemarks—ThenumberoffilemarkscrossedisdictatedbyCount.001
EOD—Spacetotheendofdatainthecurrentactivepartition.011
•Whenspacingoverblocksorfilemarksthisfieldindicateshowmanyblocksormarks
shouldbecrossed.Spacingisforward(towardsEOM)unlessCountisnegative(twos
complement)whenthespacingistowardsBOM.
•WhenspacingtoEODtheCountfieldisignored.
•WhennotspacingtoEOD,ifCountiszero,theSPACEcommandistreatedasanull
operation.Thelogicalpositionremainsunchanged,andunwrittendataisnotflushedto
tape.
Count
Explicitblockmodeisnotsupported.0ParameterLength
SPACEspecificstatus
Ifthedrivefailstospaceeitherfromamediumerrororfromsomesortofnon-fataldriveerror,
CHECKCONDITIONstatusisreported.ThesensekeywillbesettoMEDIUMERROR.Additional
sensedependsonthenatureoftheerror.Thetwomostcommonadditionalsensecodeandqualifiers
inthiscasewillbe:1100h(unrecoveredreaderror)and3B00h(sequentialpositioningerror).
Thedriveimplementsthefollowingpriorityschemewhenatapepositionpointisencountered:
BlocksLowestpriority
IfthedrivemeetsafilemarkwhilespacingtoablockCHECKCONDITION
isreported.TheMarkbitinthesensedataisset,andthesensekeyisNO
SENSE.Additionalsenseis0001h(filemarkencountered).Thefinalposition
willbebeforeorafterthefilemarkdependingonwhetherthespacewas
reverseorforward.
Filemarks
IfthedrivemeetsEODwhilespacingtoablockormark,CHECK
CONDITIONisreported.TheEOMbitinthesensedataisset.Thesense
keyisBLANKCHECKandadditionalsenseis0005h(EODencountered).
EOD
IfthedrivemeetsBOMwhilespacing,CHECKCONDITIONisreported.
TheEOMbitandValidbitinthesensedataaresetto1andtheinformation
bytessettothetotalnumberofblocksorfilemarksthatremaintobespaced
over(inotherwords,therequestednumberminusthenumberthathavebeen
spacedover).ThesensekeyisNOSENSEandadditionalsenseis0004h
(BOTdetected).
BOM
IfthedrivemeetsEOMwhilespacing,CHECKCONDITIONisreported.The
EOMbitinthesensedataisset.ThesensekeyisMEDIUMERRORand
additionalsenseis0002h(EOP/Mdetected).
EOMHighestpriority
•If“blankmedia”isencounteredduringaspace(inotherwords,thedriveattemptedtospace
onanunformattedtape),thedrivebehavesasifEODwasatBOM.Itwillthenrespondwith
SPACE11h/91h221 
						

							GOODstatustoarequesttospacetoEOD,andwithCHECKCONDITIONtoanyother
forwardspacingrequest.Additionalsenseissetto1403h(Endofdatanotfound).
•Earlywarningendofmediuminformationisnotreported.
•Ifaspacerecordsorspacefilemarkscommandfailsthenthesensedatainformationbytes
willbesettotheabsolutevalueofthedifferencebetweentherequestednumberof
marks/recordsandtheactualnumberofmarks/recordsspacedoverandtheValidbitset.
TheresidueforaprematurelyterminatedSpacetowardsBOMwillalwaysbeapositivevalue.
NOTE:ThisvaluewillonlybeaccurateifthesensekeyisNOSENSE.
•IftheformatofthedataontapeiscorruptthenCHECKCONDITIONstatusisreported.The
sensekeywillbesettoMEDIUMERROR.Additionalsensewillbesetto3001h(unknown
format).
•IfthedrivefailstoreaddatafromtapeduetoeitheraMEDIUMERRORorsomesortofnon
fataldriveerrorthenCHECKCONDITIONstatusisreported.Thesensekeywillbesetto
HARDWAREERRORAdditionalsensewillbesetto3B00h(sequentialpositioningerror).
START/STOP(CD-ROMmode)1Bh
START/STOPisexecutedfor1BhwhenthedriveisinCD-ROMmode.WhenoutofCD-ROM
mode,theLOAD/UNLOADcommand,whichsharestheopcode,isexecuted.
Assumingthatthepre-executionchecksarepassed,GOODstatusisalwaysreported.
Pre-executionchecks
BadLUNFlagLinkIllegalField
UnitAttentionDeferredErrorReservation
Commanddescriptorblock
01234567
OperationCode(1Bh)0
ImmedReserved(0)LogicalUnitNumber1
Reserved(0)2–3
StartLoEjReserved(0)4
Control5
CDBfields
Thisflagisignored.Immed
Load/Eject.Thisflagisignored.LoEj
Thisflagisignored.Start
TESTUNITREADY00h
TESTUNITREADYchecksifthedriveisreadyforcommandsthataccessthetape.Thisisdoneby
thepre-executionMediaAccesscheck;itisnotarequestforaself-test.Ifthedrivehasatape
loaded,thecommandreturnsaGOODstatus.Otherwise,CHECKCONDITIONisreportedand
thesensekeyisNOTREADY.
222Commands 
						

							Pre-executionchecks
DeferredErrorReservationIllegalField
MediaInformationMediaAccessUnitAttention
Commanddescriptorblock
01234567
OperationCode(00h)0
Reserved(0)1
4
Control5
TESTUNITREADYspecificstatus
Ifallthepre-executioncheckspass,GOODstatusisreported.
VERIFY13h
VERIFYverifiesoneormoreblocksbeginningwiththenextblockonthetape.Theverificationis
mediaverificationonly.Itreadsdatafromthetapeasitwouldforareadbutthenimmediately
discardsit.Nodataistransferredbetweenthehostanddrive.
ThecommandisidenticaltotheREADcommandinmostrespects.Thepre-executionchecksare
identical.Sensedatareportingonerrors/exceptionsisidentical.Theonlydifferencesare:
•Nodataphasesoccurduringverification.
•TheVerifycommandhasnoSILIbit.Whenanillegallengthrecordisencountered,Verify
behaveslikeREADwiththeSILIbitclear.
NOTE:Verifywillnotcompleteuntilalldatahasbeenread.ItdoesnotsupporttheANSI
“bytecompare”or“Immed”options(seetheANSISCSIspecification).
Pre-executionchecks
DeferredErrorReservationFixedBitIllegalField
DiagnosticStatusMediaAccessUnitAttention
Commanddescriptorblock
01234567
OperationCode(13h)0
FixedBCmp(0)Immed(0)Reserved(0)1
VerificationLength(MSB)2
(LSB)4
Control5
VERIFY13h223 
						

							CDBfields
TheImmediateReportingoptionisnotsupported,sothisbitmustbe0.0Immed
TheBytecompareoptionisnotsupported,sothisbitmustbe0.0BCmp
TheVerificationLengthfieldspecifiesthelengthofthedatatobeverifiedinbytes.0Fixed
TheVerificationfieldspecifiesthelengthofthedatatobeverifiedinblocks.Thesizeofeach
block(inbytes)isspecifiedbythecurrentblocklengthspecifiedintheModeParameterblock
descriptor.
1
Nodataisverified.Thisisnotconsideredanerrorandthecurrentlogicalpositionwillbe
unchanged.
0Verification
Length
Theamountofdatatobeverified,inbytesorblocksasspecifiedbytheFixedfield.>0
WRITE0Ah
Zeroormoreblocksofdataaretransferredfromthehosttotapestartingatthecurrentlogical
position.
ItisrecommendedthattheBufferedModefieldoftheMODESELECTParameterissettoeither1
or2sothatImmediatereportingisenabled;uponawritecommandthedrivewillreportGOOD
statusoncethedataissuccessfullytransferredtothedatabuffer(butnotnecessarilytotape).
Dataheldinthebufferisflushedtotapeinthefollowingcircumstances:
•ASCSIcommandisreceivedthatforcesaflush:
READMODESELECTLOGSELECTLOCATELOADERASE
WRITEBUFFERVERIFYSPACESENDDIAGNOSTICREWIND
•Bufferedmodeisnotenabled.Ifbufferedmodehasnotbeensetto1or2,thebufferisflushed
beforethecommandcompletes.
•Thewritedelaytimeisexceeded.ThisisdefinedbytheWriteDelayfieldoftheDevice
ConfigurationModeSelectpage.Ifthedriveisidleforlongerthanthis(nooperationsthat
accessthetapehavebeenperformed),anydatainthebufferisflushedtotape.
Pre-executionchecks
DeferredErrorReservationFixedBitIllegalField
DiagnosticStatusMediaWriteMediaAccessUnitAttention
Commanddescriptorblock
01234567
OperationCode(0Ah)0
FixedReserved(0)1
TransferLength(MSB)2
(LSB)4
Control5
224Commands 
						

							CDBfields
TheTransferLengthfieldspecifiesthelengthofthetransferinbytes.0Fixed
TheTransferLengthfieldspecifiesthelengthofthetransferinblocks.Thesizeofeachblock
(inbytes)isdeterminedbythecurrentBlockLengthgivenintheModeSelectParameterblock
descriptor.
1
Nodataistransferred.Thecurrentlogicalpositionwillbeunchanged.0TransferLength
Theamountofdatatobetransferred,inbytesorblocksasdeterminedbytheFixedfield.>0
WRITEspecificstatus
Seealsothe“AdditionalSensecodes”(page191)foravarietyofpossibleharderrors.
Anattempttowritetoawrite-protectedcartridgewillproduceaCHECKCONDITIONwithasense
keyofDATAPROTECTandadditionalsenseof2700h(write-protected).
AnattempttowritetoacartridgewhoseCartridgeMemoryhasfailedwillproduceaCHECK
CONDITIONwithasensekeyofMEDIUMERRORandadditionalsenseof3004h(cannotwrite
medium).If,however,thetapeisnotpositionedatBOT,thedrivewillrespondwithsensedataas
ifthetapeiswrite-protected.TheWPflagintheModeParameterHeaderwillalsobeset.
IfEOM(endofmedium)isencounteredduringawrite,CHECKCONDITIONstatusisreported.
TheEOMflagwillbeset.ThesensekeywillbesettoVOLUMEOVERFLOWwithadditionalsense
of0002h(EOT).Residueinformationwillbeasbelow.ThelogicalpositionwillbeEOD.
SubsequentRequestSensecommandswill,however,givetapepositionasEOP/M.Itmaystillbe
possibletowriteasmallerquantityofinformation(suchasfilemarksorasmallerblock).Thisis
becauselogicalpositionafterfailuretowriteablockreturnstothestartoftheunwrittenblock.
EarlyWarningEOMinformationisreportedonlyifawriteoperationissuccessful.Thisisdone
byreportingCHECKCONDITIONstatuswithasensekeyofNOSENSEandadditionalsenseof
0002h(EOT).Residueinformationisvalidandindicateszeroblocks/bytes.
Residueinformation
Residueinformationdependsontwovariables:
•FixedorVariableblockmode
•ImmediateorNon-ImmediateReport(Bufferedmode)
ResidueBufferedModeBlockMode
Numberofunwrittenbytes0Variable
Numberofunwrittenblocks0Fixed
Totalnumberofunwrittenbytesandmarks(includingthosebuffered
beforethecommandwasreceived).Thesizecanbegreaterthanthe
commandoperationsize.
not0Variable
Containsresiduesofallinitiatorswithdatainthebuffer.specifically1
Totalnumberofunwrittenblocksandmarks(includingthosebuffered
beforethecommandwasreceived).Thesizecanbegreaterthanthe
commandoperationsize.
not0Fixed
Containsresiduesofallinitiatorswithdatainthebuffer.specifically1
Residueinformationissetinthesensedatabyte,withtheValidbitsetandtheinformationbytes
settotheresidue.
WRITE0Ah225 
						

							WRITEATTRIBUTE8Dh
TheWRITEATTRIBUTEcommandallowsanapplicationclienttowriteattributevaluestoMAM
(MediumAuxiliaryMemory).ApplicationclientsshouldissueREADATTRIBUTEcommandsbefore
usingthiscommandtodiscoverwhatsupportthedeviceserverhasforMAM.
Pre-executionchecks
MediaAccessUnitAttentionDeferredErrorIllegalField
Forthiscommandtobeexecuted,theremustbeatapeinthedrive,evenifitisonlypartially
loaded.
Commanddescriptorblock
01234567
OperationCode(8Dh)0
Reserved(0)1–4
VolumeNumber(0)5
Reserved(0)6
PartitionNumber7
Reserved(0)8–9
ParameterListLength(MSB)10
(LSB)13
Reserved(0)14
Control15
CDBfields
ThenumberofthevolumewithintheMAM.ThenumberofvolumesoftheMAMmustbeequal
tothatofthetape.InthecaseofLTOUltrium,theonlyhasasinglevolume,sothisfieldisbe
setto0.
VolumeNumber
ThenumberofthepartitionwithintheMAM.ThenumberofpartitionsoftheMAMmustbe
equaltothatofthetape.
PartitionNumber
ThelengthinbytesoftheparameterlistcontainedintheData-Outbuffer.ParameterListLength
TheData-Outbufferisempty.Thisconditionisnotbeconsideredanerror.0
ThelengthinbytesoftheparameterlistcontainedintheData-Outbuffer.n
WRITEATTRIBUTEparameterlistformat
Theparameterlisthasthefollowingformat.Theattributesshouldbesentinascendingnumerical
order.Fordetailsofattributedatasee“MAMattributedata”(page132).
01234567
ParameterDataLength(n−3)(MSB)0
(LSB)3
Attribute14
a
226Commands 
						

							01234567
::
Attributexm
n
Thisisnotmandatoryandwillbeignoredbythedeviceserverbecauseitduplicatesthe
ParameterListLength.
ParameterDataLength
IftheparameterdatacontainsanattributewithanAttributeLengthofzero,oneofthefollowing
actionswilloccur:
•Iftheattributeisread-onlyorunsupported,noattributesarechanges.Thecommandfails,
returningCHECKCONDITIONwithILLEGALREQUESTsenseandadditionalsenseof2600h
(invalidfieldinparameterlist).
•Iftheattributecanbewrittento,itisdeletedandwillnotbereturnedafterasubsequentREAD
ATTRIBUTEcommand.
•Iftheattributedoesnotexist,thecommandcannotaffectit.Thisisnotconsideredanerror.
WRITEATTRIBUTEspecificstatus
ThecommandwillbeterminatedandwillreturnCHECKCONDITIONunderthefollowing
circumstances:
AdditionalSenseSenseKeyDescription
(mediumnotpresent)3A00hNOTREADYThereisnocartridgepresentinthedrive,notevenpartially
loaded.
(parameterlistlengtherror)1A00hILLEGAL
REQUEST
TheParameterListLengthresultsinthetruncationofan
attribute.
(invalidfieldinCDB)2400hILLEGAL
REQUEST
ThecombinationofVolumeNumberandPartitionNumber
isnotvalid.
(invalidfieldinparameter
list)
2600hILLEGAL
REQUEST
Theparameterdataattemptstochangearead-onlyattribute,
thatis,onethathastheRead-Onlybit(see“MAMattribute
data”(page132))settoonewhenreadwiththeREAD
ATTRIBUTEcommand.Noneoftheattributesarechanged.
(invalidfieldinparameter
list)
2600hILLEGAL
REQUEST
Theparameterdatacontainsanattributewithanincorrect
AttributeLengthfieldvalue.Noneoftheattributesare
changed.
(invalidfieldinparameter
list)
2600hILLEGAL
REQUEST
Theparameterdatacontainsanattributewithanunsupported
AttributeValuefieldvalue.Noneoftheattributesare
changed.
(invalidfieldinparameter
list)
2600hILLEGAL
REQUEST
TheattributesarenotinascendingorderintheParameter
List.Noneoftheattributesarechanged.
(MAMfull)5506hILLEGAL
REQUEST
Thereisnotenoughspacetowritealltheattributestothe
MAM.Noneoftheattributesarechanged.
WRITEATTRIBUTE8Dh227 
						

							WRITEBUFFER3Bh
WriteBufferisusedtotransferdataintomemoryonthedriveforthepurposesofdiagnostics,tests
orfirmwareupgrade.ThedataisplacedintooneofthedrivebuffersdependingontheModeand
BufferIDfieldsofthecommand.
CAUTION:Donotattempttousethebuffermodifyingfunctionsofthiscommandunlessyoureally
knowwhatyouaredoing.Thebuffermodifyingfunctionsareintendedasadiagnosticaidtobe
usedinconjunctionwiththeReadBuffercommand.Itisnotpossibletomodifydatainthebuffer
sothatitsubsequentlywrittentomediabecauseallhostdataisflushedbeforeexecutingthe
command.
Thefirmwaredownloadfunctionsareintendedforusebymanufacturingandbycustomersusing
upgradeutilitiessuppliedbyHP.
Pre-executionchecks
UnitAttentionDeferredErrorReservationIllegalField
Commanddescriptorblock
01234567
OperationCode(3Bh)0
ModeReserved(0)1
BufferID2
BufferOffset(MSB)3
(LSB)5
ParameterListLength(MSB)6
(LSB)8
Control9
CDBfields
Thisfieldcanbesettooneofthefollowingvalues:Mode
Thedrivetransfersa4-byteheaderfromthehost(whichshouldbesettozeros),followed
by(allocationlength−4)bytesofdata.Thedataiswrittenintothebufferidentifiedby
theBufferID,startingfromoffsetzerointhebuffer.TheBufferIDandBufferOffsetmust
bothbezero.AllocationLengthmustnotexceed(buffersize+4).
00h
Thedrivetransfersallocationlengthbytesofdatafromthehost,bytesofdatawhichis
placedinthebufferindicatedbyBufferID,startingfromBufferOffsetfromthestartof
thebuffer.Noheaderissent.TheBufferOffsetandAllocationLengthmustbekeptwithin
thebuffersize,andtheBufferIDmusttosettooneofthevalidvalues.
02h
Thismodeisusedtotransfernewfirmwaretothedrive.ThedrivereceivesAllocation
Lengthbytesofdatafromthehost.Thedataisstoredinthedrive’sbuffer.Thelocation
inthebufferatwhichthedataiswrittenisdeterminedbythefirmware.
Thefirmwareimageisdividedintoanumberofblocksofdatawhicharesenttothe
driveusingmultipleWriteBuffercommands.
Allthefirmwareimagedatashouldbetransferredusingthismode.TheBufferIDand
BufferOffsetareignored.
04h
228Commands  
						

							Thismodeisusedtoindicatethatthecompletefirmwareimagehasbeensenttothe
drive.ThisisthesignalforenteringtheFLASHreprogrammingstageofthefirmware
upgradeprocess.
Oncethiscommandhasbeenreceived,andtheassociateddatastoredinthebuffer,
theresidentfirmwarechecksthevalidityoftheimagethathasbeenreceived.Ifthis
seemstobecorrect,theFirmwareUpgradeoperationwillcommence.Ifanyfaultsare
detectedintheformatoftheimage,thedrivewillreportCHECKCONDITIONtothe
host.ThesensekeyisABORTEDCOMMAND,andtheadditionalsenseissetto2600h
(invalidfieldinparameterlist).
CAUTION:Oncethiscommandhasbeensentandcompleted,thedrive’spower
supplymustnotbeinterrupteduntilthedrivehascompletedthefirmwareupgrade.
TheBufferIDandBufferOffsetareignored.
05h
ThismodeisusedtowritetotheEchoBuffer.TheBufferIDandOffsetareignored.0Ah/1Ah
Specifieswhichbuffertoread.BufferID
Mainbuffer(RAM)OffsetBoundary:1byte00h
Processoraddressablememory(RAM)OffsetBoundary:1byte01h
FCburstbuffer(RAM)OffsetBoundary:512bytes,orSCSIburstbuffer(RAM)Offset
Boundary:4bytes
02h
PCAEEPROMOffsetBoundary:1byte13h
Mainbuffersegments0–7(RAM)—seebelowfordescription20h—27h
Whereinthebufferthedatashouldbewritten.Thismustbesmallerthanthesizeofthebufferand
mustobeythespecifiedoffsetboundary.Whendownloadingnewfirmware,thisfieldisignored.
BufferOffset
Theamountofdata.ThismustbesmallerthanthedifferencebetweentheBufferOffsetfieldandthe
sizeofthebuffer.
ParameterList
Length
Memorysizes
Mainbuffermemory
TheMainBuffermemoryis128MB.
AreasoftheMainBuffermemoryareusedbythefirmware.Theseshouldnotbewrittentoand
shouldnotbeexpectedtoretainvaluesthatarewrittentothem.AnyWriteandReadBuffertests
canbeperformedwhilethedriveisidle.Ifthedriveisreadingorwriting,thedatabeingwritten
orreadcanbecorrupted.
Sincethedrivehasmorethan16MBofMainBuffermemory,additionalbufferIDshavebeen
definedtoallowthewholebuffertobeaccessedin16MBsegments.Thesearedefinedasfollows:
AddressBufferID
00000000h+BufferOffset(sameasBufferID00h)20h
01000000h+BufferOffset(thatis,+16MB)21h
02000000h+BufferOffset(thatis,+32MB)22h
03000000h+BufferOffset(thatis,+48MB)23h
04000000h+BufferOffset(thatis,+64MB)24h
05000000h+BufferOffset(thatis,+80MB)25h
06000000h+BufferOffset(thatis,+96MB)26h
07000000h+BufferOffset(thatis,+112MB)27h
WRITEBUFFER3Bh229 
						

							Mainprocessormemory
NotalltheProcessormemoryspaceisaccessible.Takecarewhenwritingtoanyaddresseswithin
thisbuffer.
SCSIburstbuffer
Addressablerangefrom00000hthrough3F8000h.
PCAEEPROM
Thewriterangeislimitedto500hbytes,startingat100h(TapeToolsarea).
WRITEFILEMARKS10h
WRITEFILEMARKScausesthespecifiednumberoffilemarkstobewrittenbeginningatthecurrent
logicalpositionontape.
IftheImmedbitisset,GOODstatusmaybereportedandthemarksleftinthedatabuffer.
Otherwise,allbuffereddataandmarksarewrittenbeforestatusisreported.
Ifzerofilemarksaretobewritten,theImmedbitmustbezero.Thedrivewritesanybuffereddata
andmarkstotapebeforereporting.Thisistherecommendedwayforahosttoflushthebuffer.
Pre-executionchecks
UnitAttentionDeferredErrorReservationIllegalField
DiagnosticStatusMediaWriteMediaAccess
Commanddescriptorblock
01234567
OperationCode(10h)0
ImmedWSmkReserved(0)1
NumberofFilemarks(MSB)2
(LSB)4
Control5
CDBfields
Statuswillnotbereturneduntiltheoperationiscomplete.0Immed
ThedrivereturnsGOODstatusfollowingthepre-executionchecks(thatis,beforethecommand
startsexecuting).
1
Thisbitisnotsupportedandmustbesettozero.0WSmk
Zeroisvalidonlywhenimmediatereportisdisabled.0Numberof
MarksThisnumberoffilemarksistobewritten.>0
WRITEFILEMARKSspecificstatus
WriteFilemarksenseisidenticaltostatusfortheWritecommand.
230Commands