HP Lto 5 Manual

01234567
Reserved(0)3
WORMModeLabelRestrictions(01h)4
WORMModeFilemarkRestrictions(01h)5
Reserved(0)6–31
WORMModeissetto1whenthereisaWORMtapeloadedinthedrive.Default
is0.NotchangeablebyaMODESELECTcommand.
WORMM
Thedeviceserverdoesnotallowsometypesofformatlabelstobe
overwritten.
01hWORMModeLabelRestrictions
Thedeviceserverallowsanynumberoffilemarksimmediatelypreceding
EODtobeoverwrittenexceptthefilemarkclosesttoBOP.
02hWORMModeFileMarkRestrictions
SerialNumberOverridevendor-uniquemodepage...

Similarly,theVPDinquirypages80h(UnitSerialNumber)and83h(DeviceIdentification)supported
bytheSSC/RMCdevice(LUN0)willreturnthesameDriveSerialnumberregardlessofwhich
porttheINQUIRYcommandisissued.
Forexample,iftheDriveSerialnumberismodifiedusinganACIMODESELECTcommand,
subsequentINQUIRYcommandsforpages80hor83hissuedviatheprimaryportorADTport
willreportthesamemodifiedserialnumber.
DeviceTimemodepage
TheDeviceTimemodepageconsistsofthefollowingpageheaderfollowedbythreeTimebase
descriptors:
01234567...

01234567
LibraryTime(mins)24
LibraryTime(secs)25
Reserved0)26–27
Cumulativepower-ontimedescriptor
01234567
TimebaseIdentifier(18h)28
TimebaseFieldLength(06h)29
Reserved(0)30–31
CumulativePower-onTime(MSB)32
(LSB)35
Fielddescriptions
MODESELECTMODESENSE
1tosetLibrarytime(ignoredifthetarget
portisnotADT)
Librarytimeisinvalid.0LT
Librarytimeisvalid.1
1tosetworldtimeWorldtimeisinvalid.0WT
Worldtimeisvalid.1
IgnoredPower-ontimeisinvalid.0PT
Power-ontimeisvalid.1
IgnoredThenumberoftimesthedrivehasbeenpowered...

01234567
ResetBehaviorReserved(0)2
Reserved(0)3
ControlsthebehaviorofthedrivewhenitdetectsatargetorLUNresetmessage.ResetBehavior
Normalresetbehavior(thisisthedefaultvalue).00b
ThedrivewillflushandpositionitselfatBOTupon:
•FCdrives:aLogicalUnitResetorTargetReset.
•SASdrives:aLogicalUnitResettaskmanagementfunction.
01b
Noautomaticflush.Logicalpositionismaintained.10b
Reserved11b
CD-ROMEmulation/DisasterRecoverymodepage
ThispagecanbeusedirrespectiveofwhetherthedriveisactingasatapeoraCDdevice.
01234567...

ThedriveisinCD-ROMemulationmode.1
ThisflagcanbeusedtoswitchthedrivebetweennormaloperationandCD-ROM
emulationmode:
•Ifthisbitissettoitsexistingvalue,thereisnochange.
•Ifthisbitischangedfrom0to1,thedrivewillenterCD-emulationmode.Itwill
changeitsInquiryandModedataappropriatelyandcachethefirst250KBof
theCDimageofftape.CD-ROMsupportcommandswillbeenabled.This
transitionisprimarilypresenttosupportautomatedfunctionaltesting.Ifthebit
ischangedfrom1to0,thedriveleavesCD-ROMemulationmodeandreverts...

Commanddescriptorblock(10–byteversion)
01234567
OperationCode(5Ah)0
Reserved(0)DBDReserved(0)1
PageCodePC2
SubPageCode3
Reserved(0)4
6
AllocationLength(MSB)7
(LSB)8
Control9
CDBfields
DisableBlockDescriptorsflagDBD
AllowsthedrivetoreturntheMODESELECTblockdescriptor.0
PreventsthedrivefromreturningtheMODESELECTblockdescriptor.1
PageControl—Indicatesthetypeofpageparametervaluestobereturnedtothehost,asshown
inthefollowingtable:
PC
Description67...

Pre-executionchecks
UnitAttentionDeferredErrorReservationIllegalField
Commanddescriptorblock
01234567
OperationCode(5Eh)0
ServiceActionReserved(0)1
Reserved(0)2
6
AllocationLength(MSB)7
(LSB)8
Control9
CDBfields
Theserviceactiontypesthataresupportedare:ServiceAction
ReturnsallregisteredreservationkeysReadKeys00h
ReturnsinformationonanycurrentpersistentreservationReadReservation01h
ReturnsdetailsofthepersistentreservationfeaturessupportedReportCapabilities02h...

A32-bitcounterthatismaintainedbythedriveandincrementedeverytimeaPERSISTENTRESERVE
OUTcommandrequestsaRegister,RegisterandIgnoreExistingKey,Clear,Preempt,orPreempt
andAbortserviceaction.
PRGeneration
ReadReservationserviceaction
Thedrivereturnsaparameterlistcontainingan8-byteheaderandthepersistentreservation,if
any,thatispresentinthedrive.Ifnopersistentreservationispresent,AdditionalLengthis0and
noreservationdataisreturned.Ifapersistentreservationispresent,AdditionalLengthis10hand...

01234567
PTPL_AReserved(0)TMV(1)3
Rsvd(0)WE_EXC(0)Rsvd(0)EX_AC
(1)
Rsvd
(0)
WR_EX_RO
(0)
EX_AC_RO
(1)WR_EX_AR(0)4
EX_AC_AR(1)Reserved(0)5
Reserved(0)6
7
PersistThroughPowerLosshasnotbeenactivated0PTPL_A
ThemostrecentsuccessfullycompletedPERSISTENTRESERVEOUTcommandwithRegister
orRegisterandIgnoreExistingKeyserviceactionhadtheAPTPLbitsettooneinthe
parameterdata.
1
Alltheotherfieldsarefixed.RefertothedescriptionofPERSISTENTRESERVEOUTortheappropriate
standardsformoreinformation....

01234567
AdditionalDescriptorLength(n−23)20
23
TransportID24
n
TheI_TnexusisaPersistentReservationholder.1R_Holder
SeedetailsinPERSISTENTRESERVEOUT.TransportID
PERSISTENTRESERVEOUT5Fh
PERSISTENTRESERVEOUTisusedtorequestserviceactionsthatcreateapersistentreservation
inalogicalunitwithinthetapedrivefortheexclusiveorshareduseofaparticularI_Tnexus.The
commandusesotherserviceactionstomanageandremovesuchpersistentreservations....