Seagate Ultra 320 User Manual Page 1

Parallel SCSI InterfaceUltra 160Ultra 320

viii Parallel SCSI Interface Product Manual, Rev. A 3.7.1 DATA phase overview . . . . . . . .

86 Parallel SCSI Interface Product Manual, Rev. A Key:M = Mandatory support O = Optiona

Parallel SCSI Interface Product Manual, Rev. A 874.3.2 DISCONNECTThe DISCONNECT message is sent from a SCSI

88 Parallel SCSI Interface Product Manual, Rev. A Only one logical unit number shall be identifie

Parallel SCSI Interface Product Manual, Rev. A 894.3.5 INITIATOR DETECTED ERRORThe INITIATOR DETECTED ERROR

90 Parallel SCSI Interface Product Manual, Rev. A It is recommended that the target not attempt t

Parallel SCSI Interface Product Manual, Rev. A 91Table 32: MODIFY BIDIRECTIONAL DATA POINTER message format

92 Parallel SCSI Interface Product Manual, Rev. A 4.3.12 PARALLEL PROTOCOL REQUESTPARALLEL PROTOC

Parallel SCSI Interface Product Manual, Rev. A 93See Section 3.5 for an explanation of the differences betw

94 Parallel SCSI Interface Product Manual, Rev. A Table 34: Valid protocol options bit combinatio

Parallel SCSI Interface Product Manual, Rev. A 95be changed. Each SCSI device when transmitting data shall

Parallel SCSI Interface Product Manual, Rev. A ix4.3.16 SYNCHRONOUS DATA TRANSFER REQUEST . . . . . . . .

96 Parallel SCSI Interface Product Manual, Rev. A If an abnormal condition prevents the target fr

Parallel SCSI Interface Product Manual, Rev. A 974.3.16 SYNCHRONOUS DATA TRANSFER REQUESTSynchronous Data T

98 Parallel SCSI Interface Product Manual, Rev. A a. after a HARD RESET;b. after a TARGET RESET m

Parallel SCSI Interface Product Manual, Rev. A 994.3.16.1 Target initiated SDTR negotiationIf the target re

100 Parallel SCSI Interface Product Manual, Rev. A 4.3.18 WIDE DATA TRANSFER REQUESTWIDE DATA TRA

Parallel SCSI Interface Product Manual, Rev. A 101fer agreement shall remain intact;b. If a WDTR message fa

102 Parallel SCSI Interface Product Manual, Rev. A get causing an unexpected bus free. The initia

Parallel SCSI Interface Product Manual, Rev. A 103When a target does a physical reconnection to an initiato

104 Parallel SCSI Interface Product Manual, Rev. A 4.4.3 HEAD OF QUEUESee Table 42 for the format

Parallel SCSI Interface Product Manual, Rev. A 1054.5 Task management messagesTable 45 lists the codes us

x Parallel SCSI Interface Product Manual, Rev. A 7.3.1 Status precedence. . . . . . . . . . .

106 Parallel SCSI Interface Product Manual, Rev. A 4.5.3 ABORT TASK SETThe ABORT TASK SET message

Parallel SCSI Interface Product Manual, Rev. A 1075.0 Miscellaneous SCSI bus characteristicsAsynchronous co

108 Parallel SCSI Interface Product Manual, Rev. A A SCSI target port shall respond to an atte

Parallel SCSI Interface Product Manual, Rev. A 109The effect of the hard reset on tasks that have not compl

110 Parallel SCSI Interface Product Manual, Rev. A • Active pointers (one set per initiator on

Parallel SCSI Interface Product Manual, Rev. A 1115.6 Command processing considerations and exception condi

112 Parallel SCSI Interface Product Manual, Rev. A A task manager that detects an incorrect in

Parallel SCSI Interface Product Manual, Rev. A 1136.0 SPI information unitsAn information unit transfer tra

114 Parallel SCSI Interface Product Manual, Rev. ALogical reconnections occur on the successf

Parallel SCSI Interface Product Manual, Rev. A 115[1] See Table 49 for the format of the SPI L_Q informatio

Parallel SCSI Interface Product Manual, Rev. A xiList of FiguresFigure 1. SCSI client-server model . . . .

116 Parallel SCSI Interface Product Manual, Rev. A[1] See Table 49 for the format of the SPI

Parallel SCSI Interface Product Manual, Rev. A 117[1] See Table 49 for the format of the SPI L_Q informatio

118 Parallel SCSI Interface Product Manual, Rev. A[1] See Table 49 for the format of the SPI

Parallel SCSI Interface Product Manual, Rev. A 119If the Task Management Flags field is a supported value n

120 Parallel SCSI Interface Product Manual, Rev. ATable 47: Task Attribute[2] The Task Manage

Parallel SCSI Interface Product Manual, Rev. A 121Management Flags field is not zero. Any bytes between the

122 Parallel SCSI Interface Product Manual, Rev. A[1] The Type field is defined in Table 50.

Parallel SCSI Interface Product Manual, Rev. A 123Table 50: SPI L_Q information unit type[2] Tag field is a

124 Parallel SCSI Interface Product Manual, Rev. Athan 509 would transfer 509 bytes of data p

Parallel SCSI Interface Product Manual, Rev. A 1256.2.3 SPI data information unitThe SPI data information u

xii Parallel SCSI Interface Product Manual, Rev. A

126 Parallel SCSI Interface Product Manual, Rev. Ation unit the P_CRCA signal was asserted an

Parallel SCSI Interface Product Manual, Rev. A 1276.2.5 SPI status information unitThe SPI status informati

128 Parallel SCSI Interface Product Manual, Rev. AData List Length field and shall assume a l

Parallel SCSI Interface Product Manual, Rev. A 129The iuCRC field shall use the algorithm defined in Subsec

130 Parallel SCSI Interface Product Manual, Rev. A

Parallel SCSI Interface Product Manual, Rev. A 1317.0 SCSI commandsThis section defines the SCSI command st

132 Parallel SCSI Interface Product Manual, Rev. A The Command Descriptor Block always has an

Parallel SCSI Interface Product Manual, Rev. A 1337.2.1 Fixed and variable length Command Descriptor Block

134 Parallel SCSI Interface Product Manual, Rev. A Table 59: Typical CDB for 12-byte commandsS

Parallel SCSI Interface Product Manual, Rev. A 135See notes following Table 61.Table 61: Typical variable l

Parallel SCSI Interface Product Manual, Rev. A 11.0 Interface requirements1.1 How to use this interface man

136 Parallel SCSI Interface Product Manual, Rev. A 8.0 where the details of each command are d

Parallel SCSI Interface Product Manual, Rev. A 137Table 62: Control field[a] The Normal Auto Contingent All

138 Parallel SCSI Interface Product Manual, Rev. A 7.3 StatusA Status byte shall be sent from

Parallel SCSI Interface Product Manual, Rev. A 139Busy. This status indicates that the logical unit is busy

140 Parallel SCSI Interface Product Manual, Rev. A 7.4 Command examples7.4.1 Single command ex

Parallel SCSI Interface Product Manual, Rev. A 1417.4.2 Disconnect exampleIn the single command example, th

142 Parallel SCSI Interface Product Manual, Rev. A 7.5 Timing examplesTimes (T00 through T35)

Parallel SCSI Interface Product Manual, Rev. A 143The handling of tasks created by initiators other than th

144 Parallel SCSI Interface Product Manual, Rev. A Note. Some logical units may not detect an

Parallel SCSI Interface Product Manual, Rev. A 145The control mode page contains parameters affecting the u

2 Parallel SCSI Interface Product Manual, Rev. A 1.1.1 Scope of SCSI standardsFigure 1 uses a

146 Parallel SCSI Interface Product Manual, Rev. A 7.6.6 Unit Attention conditionThe drive set

Parallel SCSI Interface Product Manual, Rev. A 1477.6.7 Target hard reseta SCSI target port hard reset is a

148 Parallel SCSI Interface Product Manual, Rev. A The I T L nexus specifies the relationship

Parallel SCSI Interface Product Manual, Rev. A 149The drive recovery option, is to continue execution of co

150 Parallel SCSI Interface Product Manual, Rev. A Since new operating definitions may preclud

Parallel SCSI Interface Product Manual, Rev. A 1518.0 Drive features8.1 S.M.A.R.T. systemSome drive familie

152 Parallel SCSI Interface Product Manual, Rev. A The tests performed in the segments may be

Parallel SCSI Interface Product Manual, Rev. A 153Table 65: Exception commands for background self-testsa.

154 Parallel SCSI Interface Product Manual, Rev. A Table 66: Self-test mode summary8.3 Altern

Parallel SCSI Interface Product Manual, Rev. A 1558.3.2.1 Covered signalsTable 67 defines the signals to

Parallel SCSI Interface Product Manual, Rev. A 31.1.2 Applicable standards The following ANSI standards sho

156 Parallel SCSI Interface Product Manual, Rev. A For each new run, the Sequence ID is set t

Parallel SCSI Interface Product Manual, Rev. A 1578.3.2.2 Code descriptionThe protection code (see Table 68

158 Parallel SCSI Interface Product Manual, Rev. A 8.3.3.1 Protection code transmissionSCSI d

Parallel SCSI Interface Product Manual, Rev. A 1598.4.2 Case 1—Power off during removal or insertiona. All

160 Parallel SCSI Interface Product Manual, Rev. A c. A SCSI device being removed shall maint

Parallel SCSI Interface Product Manual, Rev. A 161IndexAabort message 138abort task 138abort task messag

162 Parallel SCSI Interface Product Manual, Rev. Acode valuereserved 131command 4, 6abort

Parallel SCSI Interface Product Manual, Rev. A 163disconnect privilege 148domain 5, 9dormanttask state

164 Parallel SCSI Interface Product Manual, Rev. Ainformation unit sequence 113information u

Parallel SCSI Interface Product Manual, Rev. A 165multidrop 7multimodeSCSI bus signal 15multimode I/O ci

4 Parallel SCSI Interface Product Manual, Rev. A Figure 2. SCSI client-server model1.2.1 Gloss

166 Parallel SCSI Interface Product Manual, Rev. Aprotection code error 158protection code g

Parallel SCSI Interface Product Manual, Rev. A 167RSPVALID. see Packetized Failures ValidRST. see ResetSsave

168 Parallel SCSI Interface Product Manual, Rev. ASPI status information unit 113, 127ST Da

Parallel SCSI Interface Product Manual, Rev. A 169two-byte message 84TypeSPI L_Q information unit 121,

170 Parallel SCSI Interface Product Manual, Rev. A

Seagate Technology LLC920 Disc Drive, Scotts Valley, California 95066-4544, USAPublication Number: 100293069, Rev. A, Printed in USA

Parallel SCSI Interface Product Manual, Rev. A 5command descriptor block—A structure used to communicate a

6 Parallel SCSI Interface Product Manual, Rev. A double transition (DT)—The latching of data o

Parallel SCSI Interface Product Manual, Rev. A 7I/O operation—An operation defined by an unlinked SCSI comm

8 Parallel SCSI Interface Product Manual, Rev. A nexus—A relationship between a SCSI initiator

Parallel SCSI Interface Product Manual, Rev. A 9protocol service request—A call to the lower level protocol

10 Parallel SCSI Interface Product Manual, Rev. A service delivery transaction—A request or re

Parallel SCSI Interface Product Manual, Rev. A 11third-party command—A SCSI command which requires a logica

12 Parallel SCSI Interface Product Manual, Rev. A 1.3 Physical interface characteristicsThe ph

Parallel SCSI Interface Product Manual, Rev. A ) 132.0 SCSI busThis manual discusses only the “logical” and

14 Parallel SCSI Interface Product Manual, Rev. A )The Host Adapter/Initiator must be identified

Parallel SCSI Interface Product Manual, Rev. A ) 152.1 SCSI bus signals overviewInformation transfer on the

Parallel SCSI InterfaceUltra 160Ultra 320

16 Parallel SCSI Interface Product Manual, Rev. A )During the SELECTION PHASE, RESELECTION PHASE,

Parallel SCSI Interface Product Manual, Rev. A ) 17When information unit transfers are enabled, the P1 signa

18 Parallel SCSI Interface Product Manual, Rev. A )Figure 3. Voltage and current definitionsFigu

Parallel SCSI Interface Product Manual, Rev. A ) 192.4 Signal sourcesTable 3 indicates the type of SCSI de

20 Parallel SCSI Interface Product Manual, Rev. A )2.5 SCSI bus timing Unless otherwise indicated

Parallel SCSI Interface Product Manual, Rev. A ) 21Table 5: SCSI bus data and information phase ST timing va

22 Parallel SCSI Interface Product Manual, Rev. A )[2] Cable skew is measured at each SCSI device

Parallel SCSI Interface Product Manual, Rev. A ) 23Table 7: Transmit SCSI bus data and information phase DT

24 Parallel SCSI Interface Product Manual, Rev. A )Table 8: Receive SCSI bus data and information

Parallel SCSI Interface Product Manual, Rev. A ) 25Table 9: SCSI Fast-160 and fast 320 non-compensatable tim

©2006, Seagate Technology LLC All rights reserved Publication number: 100293069, Rev. A March 2006Seagate and Seagate Technology are registered trad

26 Parallel SCSI Interface Product Manual, Rev. A )2.5.1 Arbitration delay The minimum time a SCS

Parallel SCSI Interface Product Manual, Rev. A ) 27When information unit transfers are being used with synch

28 Parallel SCSI Interface Product Manual, Rev. A )2.5.12 De-skewed data valid windowThe minimum

Parallel SCSI Interface Product Manual, Rev. A ) 292.5.21 Data release delayThe maximum time for a SCSI init

30 Parallel SCSI Interface Product Manual, Rev. A )DB(P1) signals. For paced data transfers negat

Parallel SCSI Interface Product Manual, Rev. A ) 312.5.40 Receiver amplitude time skewThe maximum time shift

32 Parallel SCSI Interface Product Manual, Rev. A )pensation.2.5.49 Skew correction rangeThe mini

Parallel SCSI Interface Product Manual, Rev. A ) 33The minimum time that a SCSI target port shall negate the

34 Parallel SCSI Interface Product Manual, Rev. A )SE SCSI devices with data transfer rates up to

Parallel SCSI Interface Product Manual, Rev. A ) 35Figure 8 shows an example of transfers with a negotiated

Parallel SCSI Interface Product Manual, Rev. A iiiRevision status summary sheetRevision Date Writer/Enginee

36 Parallel SCSI Interface Product Manual, Rev. A )Figure 7. DT synchronous transfer exampleFigu

Parallel SCSI Interface Product Manual, Rev. A ) 37The receiver skew compensation and clock shifting adjust

38 Parallel SCSI Interface Product Manual, Rev. A )2.10 ST DATA phase parallel transfersThe forma

Parallel SCSI Interface Product Manual, Rev. A ) 39The iuCRC shall be used to protect all SPI information un

40 Parallel SCSI Interface Product Manual, Rev. A )If the responding negotiation message contains

Parallel SCSI Interface Product Manual, Rev. A ) 41When negotiating, the responding port shall respond with

42 Parallel SCSI Interface Product Manual, Rev. A )2.12.4 Transfer agreementsThe transfer agreeme

Parallel SCSI Interface Product Manual, Rev. A ) 432.12.5 Transfer period factorThe Transfer Period Factor f

44 Parallel SCSI Interface Product Manual, Rev. A )2.12.6 REQ/ACK offsetThe REQ/ACK OFFSET field

Parallel SCSI Interface Product Manual, Rev. A ) 452.12.8 Protocol optionsThe protocol options fields affect

iv Parallel SCSI Interface Product Manual, Rev. A

46 Parallel SCSI Interface Product Manual, Rev. A )Table 19 describes the bus phases resulting

Parallel SCSI Interface Product Manual, Rev. A ) 47Table 20 defines valid combinations of HOLD_MCS and oth

48 Parallel SCSI Interface Product Manual, Rev. A )2.12.9 Negotiable field combinationsNot all co

Parallel SCSI Interface Product Manual, Rev. A ) 492.12.10 Message restrictionsPPR may be originated by SCSI

50 Parallel SCSI Interface Product Manual, Rev. A )

Parallel SCSI Interface Product Manual, Rev. A 513.0 Logical characteristicsThe operations of the SCSI bus

52 Parallel SCSI Interface Product Manual, Rev. A a. after any bus reset event.b. after a transce

Parallel SCSI Interface Product Manual, Rev. A 53SCSI devices with arbitration fairness enabled shall maint

54 Parallel SCSI Interface Product Manual, Rev. A 3.1.2.2 QAS protocolQuick Arbitration and Selec

Parallel SCSI Interface Product Manual, Rev. A 554. If the SCSI initiator creates an attention condition, t

Parallel SCSI Interface Product Manual, Rev. A vTable of Contents1.0 Interface requirements. . . . . . . .

56 Parallel SCSI Interface Product Manual, Rev. A Refer to Section 3.4 for a description of the f

Parallel SCSI Interface Product Manual, Rev. A 573.2.1.1.4 Selection using attention condition timeout proc

58 Parallel SCSI Interface Product Manual, Rev. A (a) Optionally, the initiator shall assert the

Parallel SCSI Interface Product Manual, Rev. A 59glitch may cause the BSY signal to appear false for up to

60 Parallel SCSI Interface Product Manual, Rev. A 3.5 Information transfer phasesThe COMMAND, DAT

Parallel SCSI Interface Product Manual, Rev. A 61Synchronous transfers shall only be used for negotiated tr

62 Parallel SCSI Interface Product Manual, Rev. A hold time after the assertion of the REQ signal

Parallel SCSI Interface Product Manual, Rev. A 633. shall delay at least one transmit setup time;4. shall t

64 Parallel SCSI Interface Product Manual, Rev. A ABORT TASK message (see Section 4.5.2) to the t

Parallel SCSI Interface Product Manual, Rev. A 652. read the value of the P_CRCA signal within one pCRC rec

vi Parallel SCSI Interface Product Manual, Rev. A 2.5.35 Receive setup time . . . . . . . . .

66 Parallel SCSI Interface Product Manual, Rev. A Note. The above requirements in steps 6), 10),

Parallel SCSI Interface Product Manual, Rev. A 67Pad field data and pCRC field data are transferred using t

68 Parallel SCSI Interface Product Manual, Rev. A The target shall read the value of the DB(15-0)

Parallel SCSI Interface Product Manual, Rev. A 69If the retain training information is enabled, a training

70 Parallel SCSI Interface Product Manual, Rev. A 4. simultaneously assert and negate P1, P_CRCA,

Parallel SCSI Interface Product Manual, Rev. A 71The SCSI initiator port shall begin the section A of its t

72 Parallel SCSI Interface Product Manual, Rev. A The data invalid state shall have at least one

Parallel SCSI Interface Product Manual, Rev. A 73The SCSI target port shall begin pacing transfers only aft

74 Parallel SCSI Interface Product Manual, Rev. A and(e) shall hold the DB(15-0) signals valid fo

Parallel SCSI Interface Product Manual, Rev. A 75Table 22: Wide SCSI byte orderIf the last information byte

Parallel SCSI Interface Product Manual, Rev. A vii2.12.8.3QAS_REQ . . . . . . . . . . . . . . . . . . . . .

76 Parallel SCSI Interface Product Manual, Rev. A 3.7.3 DT DATA OUT phaseThe DT DATA OUT phase al

Parallel SCSI Interface Product Manual, Rev. A 77A QAS-capable SCSI initiator port shall assert ACK for a m

78 Parallel SCSI Interface Product Manual, Rev. A d. When switching the Data Bus or DB(P_CRCA) si

Parallel SCSI Interface Product Manual, Rev. A 79The final information transfer phase is normally the MESSA

80 Parallel SCSI Interface Product Manual, Rev. A 3.11.4 Phase sequences for physical reconnectio

Parallel SCSI Interface Product Manual, Rev. A 813.11.5 Phase sequences for physical selection using attent

82 Parallel SCSI Interface Product Manual, Rev. A For COMMAND, MESSAGE, and STATUS phases, the DB

Parallel SCSI Interface Product Manual, Rev. A 834.0 Message system specificationSCSI protocol messages all

84 Parallel SCSI Interface Product Manual, Rev. A Table 24: Message format4.2.1 One-byte messages

Parallel SCSI Interface Product Manual, Rev. A 85Table 26: Extended Message Codes1. The EXTENDED MESSAGE AR