HP Lto 5 Manual

DescriptionTaskManagementFunctionCode
PerformstheCLEARTASKSETtaskmanagementfunctionwith:
L=LogicalUnitNumberfield
CLEARTASKSET04h
PerformstheLOGICALUNITRESETtaskmanagementfunctionwith:
L=LogicalUnitNumberfield
LOGICALUNITRESET08h
SupportedbyFCforlegacyFChostdrivers.TARGETRESET10h
I_TNEXUSRESET10h
Reserved20h
NotsupportedCLEARACA40h
PerformstheQUERYTASKtaskmanagementfunctionwith:
L=LogicalUnitNumberfield
Q=TagofTasktoBeManagedfield
QUERYTASK(SASonly)80h
QUERYTASKSET81h
QUERYASYNCHRONOUS
EVENT
82h...

4Introductiontocommands
ThischaptercontainsnotesrelatingtotheSCSIcommandslistedin“Commands”(page29).
Summary
ThefollowingtableisasummaryoftheSCSIcommandsforsequentialaccessdevices,showing
theoperationcode:
CommandNameOpcode
TESTUNITREADY00h
REWIND01h
REQUESTSENSE03h
FORMATMEDIUM04h
READBLOCKLIMITS05h
READ08h
READ6(CD-ROM)08h
WRITE0Ah
SETCAPACITY0Bh
WRITEFILEMARKS10h
SPACE11h
INQUIRY12h
VERIFY13h
MODESELECT15h
RESERVEUNIT16h
RELEASEUNIT17h
ERASE19h
MODESENSE1Ah
LOAD/UNLOAD1Bh
START/STOPUNIT(CD-ROM)1Bh...

CommandNameOpcode
READTOC(CD-ROM)43h
REPORTDENSITYSUPPORT44h
LOGSELECT4Ch
LOGSENSE4Dh
MODESELECT(10)55h
RESERVEUNIT(10)56h
RELEASEUNIT(10)57h
MODESENSE(10)5Ah
PERSISTENTRESERVEIN5Eh
PERSISTENTRESERVEOUT5Fh
READATTRIBUTE8Ch
WRITEATTRIBUTE8Dh
REPORTLUNSA0h
SECURITYPROTOCOLINA2h
REPORTDEVICEIDENTIFIERA3h(05h)
REPORTTARGETPORTGROUPSA3h(0Ah)
REPORTSUPPORTEDOPCODESA3h(0Ch)
REPORTSUPPORTEDTASKMANAGEMENTFUNCTIONSA3h(0Dh)
REPORTTIMESTAMPA3h(0Fh)
EnhancedFIRMWAREUPGRADEREPORTIMAGEINFORMATIONA3h(1Fh)...

CommandNameOpcode
FORCEDEJECTA4h(1Fh)
FORCESNAPSHOTA4h(1Fh)
SETSNAPSHOTCOMMANDSA4h(1Fh)
SETSNAPSHOTCONFIGURATIONA4h(1Fh)
READMEDIASERIALNUMBERABh(01h)
SECURITYPROTOCOLOUTB5h
SAS-specificVendor-UniqueENABLETLRSC2h
Commanddetails
Thecommanddescriptionsin“Commands”(page29)arelistedinalphabeticalorderofcommand
name(ignoringwordslike“Enhanced”and“Vendor-unique”).Eachcommandisdescribedbriefly.
Thisisfollowedbyalistofpre-executioncheckswhicharedescribedbelow.TheCommand...

DeferredErrorcheck
Adeferrederrorisgeneratedwhenacommandwithimmediatereportfailsafterthereporthas
beenreturned.Thechecklookstoseeifadeferrederrorexistsforthehostwhichsentthecommand,
inotherwords,adeferrederrorforwhichCHECKCONDITIONstatushasnotyetbeenreported.
Ifsuchanerrorexists,thenthedrivereportsCHECKCONDITION.Thesensedataforthecommand
issettoDEFERREDERROR(whichwasgeneratedwhensomepreviouscommandfailed).
NotethatifaUNITATTENTIONconditionandaDEFERREDERRORconditionbothexistforan...

Ifafieldhasbeensettoanillegalvalue:
•CHECKCONDITIONstatusisreportedtothehostwithasensekeyofILLEGALREQUESTand
additionalsenseof2400h“invalidfieldinCDB”.
•Thesensekeyspecificbitissetandthesensekeyspecificbyteswillbeafieldpointer.
•Thecommand/databitisset,indicatingthattheillegalparameterwasinthecommand.
NOTE:Commanddescriptorblocksarescannedfromleft(bit7)toright(bit0),anddown
(frombyte0tobyten).Thefieldpointerwillbesettopointtothefirstbitofthefirstillegal...

ParameterListcheck
ForLOGSELECT,MODESELECTandsomediagnosticcommands,theassociateddatasenttothe
driveisintheformofparameterlists.Thesearedescribedunderthecommandnamesinthenext
chapter.Checksareperformedtotestthefollowing:
•Fixedandreservedfieldshavenotbeenmodified.Fixedfieldsareindicatedbyanumberin
roundbracketsfollowingthefieldname.
•Afieldhasbeensettoaninvalidvalue.
•Thesyntaxofthepageofparametershasbeenviolated—forexample,whereaparticular...

ThereareanumberoffieldsinaCDBwhicharecommontoallcommands.Theseareshownin
thefollowingtable.
Theoperationcodeuniquelyidentifiesthecommand.Thetopthreebitsoftheoperationcode
areknownasthegroupcodeandthesedefinethelengthofthecommanddescriptorblock:
GroupCodeand
OperationCode
Six-bytecommands
Ten-bytecommands
Ten-bytecommands
Six-bytecommands
Sixteen-bytecommands
Twelve-bytecommands
Vendor-uniquecommands
notsupported
Group0
Group1
Group2
Group3
Group4
Group5
Group6
Group7...

5Commands
ThischapterdescribesallSCSIcommands.PartsofthechapterarebasedonsectionsoftheSCSI
specification(see“Generaldocumentsandstandardization”(page233)).
Forgeneralnotesonthecommanddescriptions,see“Introductiontocommands”(page22).
Vendor-uniqueENABLETRANSPORTLAYERRETRIES(SASdrivesonly)
C2h
ThisprovidesafastbenigncommandtoenableSASTransportLayerRetries.Thestateofthe
TransportLayerRetriessetbythiscommandforagivenhostisreflectedintheProtocol-Specific
LogicalUnitmodepageforSASSSP(18h)forthathost....

01234567
HPLTOVUMIOpcode(05h)2
SegmentOffset(MSB)3
(LSB)5
SegmentLength(MSB)6
(LSB)8
Reserved(0)9
LastReserved(0)10
Control11
CDBfields
Theoffsetwithinthebankatwhichthissegmentwillbestored.Theapplicationclientmust
setthistozeroforthefirstdownloadsegmentcommand.(Itispossibletore-startthefirmware
downloadprocessmanytimesbysettingSegmentOffsettozero).Thefieldhasthefollowing
restrictions:
•Itmustbeamultipleof4bytes.
•Itmustresidewithinthebanksize(1.91MB).
SegmentOffset...