Quantum DAT 24 Drive Podręcznik Użytkownika

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DDS-4 and DAT 72 Tape Drives and Autoloaders . . . .

Page viii DDS-4 SCSI Interface Manual, Rev. B Definition of Sense Keys...

Page 88 DDS-4 SCSI Interface Manual, Rev. B Completion Status The Completion Status for the MODE SELECT command is shown in the following table. Co

Commands: Mode Sense (1Ah) Page 89 MODE SENSE (1Ah) The MODE SENSE command allows the host to determine various drive device parameters. These parame

Page 90 DDS-4 SCSI Interface Manual, Rev. B Command Descriptor Block Field Description The following table defines the fields in the CDB. Field Nam

Commands: Mode Sense (1Ah) Page 91 MODE SENSE Parameters The parameter list for the MODE SENSE command contains • A four-byte header, followed by •

Page 92 DDS-4 SCSI Interface Manual, Rev. B Field Name Bytes Bits Description Block Descriptor Length 3 This field indicates the number of by

Commands: Mode Sense (1Ah) Page 93 Density Code 0 The values for the Density Code field are as follows: 25h DDS-3 format 26h DDS-4 format 47h

Page 94 DDS-4 SCSI Interface Manual, Rev. B Disconnect/Reconnect Page (02h) The Disconnect/Reconnect page allows the host to tune performance of th

Commands: Mode Sense (1Ah) Page 95 Control Mode Page (0Ah) The Control Mode page allows the host to enable or disable the generation of a Check Condi

Page 96 DDS-4 SCSI Interface Manual, Rev. B Byte Bits 7 6 5 4 3 2 1 0 8 Decompression Algorithm 9 Decompression Algorithm 10 Decompression Algo

Commands: Mode Sense (1Ah) Page 97 01-1F 21-FF The data last sent to the host was compressed using an algorithm other than the DCLZ algorithm. The co

Contents Page ix WRITE DATA BUFFER Command Descriptor Block...168 Command Descriptor Block Field Descriptions...

Page 98 DDS-4 SCSI Interface Manual, Rev. B Device Configuration Page Field Descriptions The following table describes the fields in the Device Con

Commands: Mode Sense (1Ah) Page 99 Medium Partition Page (11h) The Medium Partition page indicates single- or dual-partition tape format. the MODE SE

Page 100 DDS-4 SCSI Interface Manual, Rev. B Element Address Assignment Page (Autoloader Only—1Dh) The data in the Element Address Assignment page

Commands: Mode Sense (1Ah) Page 101 Byte Bits 7 6 5 4 3 2 1 0 10 0 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 12 0 0 0 0 0 0 0 0 13 0 0 0 0 1 0 0 0 14 0

Page 102 DDS-4 SCSI Interface Manual, Rev. B MOVE MEDIUM (Autoloader only) (A5h) The MOVE MEDIUM command requests that the Autoloader move a cartri

Commands: Move Medium (A5h) Page 103 Completion Status The Completion Status for the MOVE MEDIUM command is shown in the following table. Code Messag

Page 104 DDS-4 SCSI Interface Manual, Rev. B PREVENT/ALLOW MEDIA REMOVAL (1Eh) If the Prevent/Allow Media Removal command is sent, the cartridge c

Commands: Read (08h) Page 105 READ (08h) The READ command transfers one or more bytes or blocks from the drive to the Initiator beginning with the n

Page 106 DDS-4 SCSI Interface Manual, Rev. B Description of the READ Command The READ command is complete when one of the following conditions is m

Commands: Read (08h) Page 107 Transfer Length Satisfied If the CDB Transfer Length is satisfied, the command completes successfully with a Good St

Page 108 DDS-4 SCSI Interface Manual, Rev. B • If the actual block length exceeds the CDB Transfer Length, the Incorrect Length error is reported.

Commands: Read (08h) Page 109 For example, assume the following: • The drive is currently positioned before block N. • Block N + 1 contains 512 by

Page 110 DDS-4 SCSI Interface Manual, Rev. B READ BLOCK LIMITS (05h) The READ BLOCK LIMITS command causes the drive to transfer the block length l

Commands: Read Block Limits (05h) Page 111 Completion Status The Completion Status for the READ BLOCK LIMITS command is shown in the following table.

Page 112 DDS-4 SCSI Interface Manual, Rev. B READ DATA BUFFER (3Ch) The READ DATA BUFFER command returns the 4-byte Read Buffer header plus the num

Commands: Read Data Buffer (3Ch) Page 113 READ DATA BUFFER Header The following table shows the header layout for the READ DATA BUFFER command. Byte

Page 114 DDS-4 SCSI Interface Manual, Rev. B READ ELEMENT STATUS (Autoloader Only) (B8h) The READ ELEMENT STATUS command requests the Autoloader to

Commands: Read Element Status (B8h) Page 115 The following example illustrates the data structure returned for a 12-slot magazine. Element Status D

Page 116 DDS-4 SCSI Interface Manual, Rev. B Byte Bits 7 6 5 4 3 2 1 0 0 Element Type Code 1 0 0 0 0 0 0 0 0 2 MSB Element Descriptor Length 3

Commands: Read Element Status (B8h) Page 117 Storage Element Descriptor The 12-byte storage element descriptor is returned (within the CDB request)

Introduction Page 1 Introduction Overview The Seagate DDS-4 and DAT 72 DAT drives are designed for computer environments requiring high performance

Page 118 DDS-4 SCSI Interface Manual, Rev. B Completion Status The Completion Status for the READ ELEMENT STATUS command is shown in the following

Commands: Read Position (34h) Page 119 READ POSITION (34h) The READ POSITION command reports the block address of the current logical block. The curr

Page 120 DDS-4 SCSI Interface Manual, Rev. B READ POSITION Data Format The following table shows the layout for the READ POSITION data format when

Commands: Read Position (34h) Page 121 Last Block Location 8-11 These fields indicate the block address associated with the current logical positi

Page 122 DDS-4 SCSI Interface Manual, Rev. B Field Name Bytes Bits Description BOP bit 0 7 0 = The current logical position is not at BOT. 1

Commands: Read Position (34h) Page 123 Completion Status The Completion Status for the READ POSITION command is shown in the following table. Code Me

Page 124 DDS-4 SCSI Interface Manual, Rev. B RECEIVE DIAGNOSTIC RESULTS (1Ch) The RECEIVE DIAGNOSTIC RESULTS command requests any available analysi

Commands: Receive Diagnostic Results (1Ch) Page 125 occurred during one of the tests, byte 4 is set to the previous test that passed successfully. If

Page 126 DDS-4 SCSI Interface Manual, Rev. B RELEASE UNIT (17h / 57h) The RELEASE UNIT command releases a current drive reservation, if the command

Commands: Report Density Support (44h) Page 127 10-byte version: Byte Bits 7 6 5 4 3 2 1 0 0 0 1 0 1 0 1 1 1 1 0 0 0 3rd Pty 0 0 LongID* 0 2 0

Page 2 DDS-4 SCSI Interface Manual, Rev. B SCSI Interface Description Overview The Seagate DDS-4 and DAT 72 drives are designed to operate with t

Page 128 DDS-4 SCSI Interface Manual, Rev. B REPORT DENSITY SUPPORT (44h) The REPORT DENSITY SUPPORT command requests transfer of information regar

Commands: Report Density Support (44h) Page 129 REPORT DENSITY SUPPORT Header The following table shows the header layout for the REPORT DENSITY SUPP

Page 130 DDS-4 SCSI Interface Manual, Rev. B Field Name Bytes Bits Description Bits per MM 5-7 Bits per millimeter per track. Value depends

Commands: Request Block Address (02h) Page 131 REQUEST BLOCK ADDRESS (02h) The REQUEST BLOCK ADDRESS command requests the drive to transfer the curre

Page 132 DDS-4 SCSI Interface Manual, Rev. B REQUEST BLOCK ADDRESS Address Data Field Description The Block Address Fields (bytes 0 through 2) repo

Commands: Request Sense (03h) Page 133 REQUEST SENSE (03h) The REQUEST SENSE command causes the drive to transfer status data to the Initiator pertai

Page 134 DDS-4 SCSI Interface Manual, Rev. B Byte Bits 7 6 5 4 3 2 1 0 15 SKSV C/D 0 0 BPV | Bit Pointer 16 MSB—Field Pointer 17

Commands: Request Sense (03h) Page 135 Field Name Bytes Bits Description Field Pointer 16-17 If the BPV bit is set, this field points to the mo

Page 136 DDS-4 SCSI Interface Manual, Rev. B The following table lists the additional sense code and code qualifiers. Byte 2 (Sense Key) Byte 12 (

Commands: Request Sense (03h) Page 137 Byte 2 (Sense Key) Byte 12 (ASC) Byte 13 (ASCQ) Definition (Additional sense code) 3 30 C4 Block Access

SCSI Interface Description Page 3 Signal Descriptions The drive SCSI interface consists of eighteen signals. Nine are control lines and eighteen ar

Page 138 DDS-4 SCSI Interface Manual, Rev. B Byte 2 (Sense Key) Byte 12 (ASC) Byte 13 (ASCQ) Definition (Additional sense code) 4 40 B4 Diagn

Commands: Request Sense (03h) Page 139 Byte 2 (Sense Key) Byte 12 (ASC) Byte 13 (ASCQ) Definition (Additional sense code) 4 44 D3 AIC internal

Page 140 DDS-4 SCSI Interface Manual, Rev. B Byte 2 (Sense Key) Byte 12 (ASC) Byte 13 (ASCQ) Definition (Additional sense code) B Aborted Co

Commands: Request Sense (03h) Page 141 Bytes 16-17 Definition (vendor-unique SKSV codes) 1B Diagnostic DMA write RD parity error 1C Diagnostic DMA

Page 142 DDS-4 SCSI Interface Manual, Rev. B Bytes 16-17 Definition (vendor-unique SKSV codes) 54 Unexpected DSM primitive 55 Exhausted all comm

Commands: Request Sense (03h) Page 143 Bytes 16-17 Definition (vendor-unique SKSV codes) 86 Invalid entity compression algorithm 87 Invalid entity

Page 144 DDS-4 SCSI Interface Manual, Rev. B Bytes 16-17 Definition (vendor-unique SKSV codes) B7 Loader, Load Magazine Failed B8 Loader, Unload

Commands: Request Sense (03h) Page 145 Bytes 16-17 Definition (vendor-unique SKSV codes) EB Tape cassette load error EC Tape cassette unload erro

Page 146 DDS-4 SCSI Interface Manual, Rev. B RESERVE UNIT (16h / 56h) The RESERVE UNIT command reserves the drive for exclusive use of the requesti

Commands: Reserve Unit (16h / 56h) Page 147 10-byte version The drive also supports the SCSI-3 10-byte Reserve Unit Command. The table below shows th

Page 4 DDS-4 SCSI Interface Manual, Rev. B Command Set Description The following table shows the SCSI commands for sequential access devices imple

Page 148 DDS-4 SCSI Interface Manual, Rev. B Completion Status The Completion Status for the RESERVE UNIT command is shown in the following table.

Commands: Rewind (01h) Page 149 REWIND (01h) The REWIND command causes the drive to rewind the cartridge to the Beginning-of-Partition (BOP). Any wri

Page 150 DDS-4 SCSI Interface Manual, Rev. B SEEK BLOCK (0Ch) The SEEK BLOCK command is used to position the tape to the specified block address in

Commands: Seek Block (0Ch) Page 151 Completion Status The Completion Status for the SEEK BLOCK command is shown in the following table. Code Message

Page 152 DDS-4 SCSI Interface Manual, Rev. B SEND DIAGNOSTIC (1Dh) The SEND DIAGNOSTIC command requests the drive to perform diagnostic operations

Commands: Send Diagnostic (1Dh) Page 153 Completion Status The Completion Status for the SEND DIAGNOSTIC command is shown in the following table. Cod

Page 154 DDS-4 SCSI Interface Manual, Rev. B SPACE (11h) The SPACE command uses five methods to move the tape. This command moves the position:

Commands: Space (11h) Page 155 Command Descriptor Block Field Descriptions The following table provides descriptions of the CDB fields. Field Name

Page 156 DDS-4 SCSI Interface Manual, Rev. B • If an unrecoverable data error is encountered, Check Condition is returned, Extended Sense Key is s

Commands: Space (11h) Page 157 Referring to the first table, the table below shows the tape position after each SPACE command is complete. SPACE X B

SCSI Interface Description Page 5 ANSI X3.131, 199x Conformance Statement (SCSI-2) General features • Disconnect/reconnect, arbitration (required i

Page 158 DDS-4 SCSI Interface Manual, Rev. B TEST UNIT READY (00h) The TEST UNIT READY command tests for three conditions: • The drive is powered

Commands: Test Unit Ready (00h) Page 159 If a cartridge is in the drive at power up and a TEST UNIT READY command is issued before the tape is positi

Page 160 DDS-4 SCSI Interface Manual, Rev. B VERIFY (13h) The VERIFY command verifies one or more blocks of data beginning with the next block from

Commands: Verify (13h) Page 161 The byte compare starts on a block boundary starting at the current tape block position. Completion Status The Compl

Page 162 DDS-4 SCSI Interface Manual, Rev. B WRITE (0Ah) The WRITE command transfers one or more data blocks from the Initiator to the drive. If th

Commands: Write (0Ah) Page 163 Code Message Description 00h Good Status • The SCSI data has been transferred to the data buffer. • The drive rema

Page 164 DDS-4 SCSI Interface Manual, Rev. B WRITE DATA BUFFER (3Bh) The WRITE DATA BUFFER command is used in conjunction with the READ DATA BUFFER

Commands: Write Data Buffer (3Bh) Page 165 Command Descriptor Block Field Descriptions The following table provides descriptions of the CDB fields. F

Page 166 DDS-4 SCSI Interface Manual, Rev. B Completion Status The Completion Status for the WRITE DATA BUFFER command is shown in the following ta

Commands: Write Filemarks (10h) Page 167 WRITE FILEMARKS (10h) The WRITE FILEMARKS command causes the specified number of filemarks or setmarks to be

Page 6 DDS-4 SCSI Interface Manual, Rev. B Commands Erase Read Position Exchange Medium* Release Unit Initialize Element Status* Receive Diagnost

Page 168 DDS-4 SCSI Interface Manual, Rev. B Completion Status The Completion Status for the WRITE FILEMARKS command is shown in the following tabl

Commands: Write Filemarks (10h) Page 169 Certance LLC 1650 Sunflower Avenue, Costa Mesa, California, 92626, USA Part Number

SCSI Interface Description Page 7 Data-transfer operations on the SCSI bus are either asynchronous or synchronous. Asynchronous data transfer operat

Page 8 DDS-4 SCSI Interface Manual, Rev. B Figure 2-1 Phase Sequencing with Arbitration RESET CONDITIONBUS FREEPHASEARBITRATIONPHASESELECTION ORRE

SCSI Interface Description Page 9 2. The SCSI device waits a minimum of one bus free delay of 800 nSec after detection of a Bus Free Phase before dr

Page 10 DDS-4 SCSI Interface Manual, Rev. B For example, the Initiator can select a tape drive to begin an operation, or the tape drive can reselec

SCSI Interface Description Page 11 1 The host supports disconnects. The drive disconnects from the SCSI bus appropriately for the command in progre

Page 12 DDS-4 SCSI Interface Manual, Rev. B t3 The Initiator reads the data and parity signals after REQ is asserted and then signals its acceptanc

SCSI Interface Description Page 13 Figure 2-5 Signals Used in Transfer from Initiator to Target Synchronous Data Transfer Both the Initiator and T

Page 14 DDS-4 SCSI Interface Manual, Rev. B The minimum value fo the Transfer Period (25 nsec) is determined by the maximum burst transfer rate of

SCSI Interface Description Page 15 Data Phase The Data Phase is subdivided into the Data-In and Data-Out Phases. Data-In Phase During the Data-In p

Page 16 DDS-4 SCSI Interface Manual, Rev. B Command Descriptor Block A request to a peripheral device is performed by sending a Command Descriptor

SCSI Interface Description Page 17 Group Code* This field indicates which of eight possible SCSI command groups is specified. Seagate drives suppor

Copyright © 2003 Certance LLC. All rights reserved Part Number 50000697 June 2003, Rev.B Certance and the Certance logo are trade

Page 18 DDS-4 SCSI Interface Manual, Rev. B SCSI Message Descriptions and Definitions The SCSI message codes, descriptions, and directions are giv

SCSI Interface Description Page 19 The following table lists SCSI messages and their definitions. Hex Code Message Definition 00h Command Complete

Page 20 DDS-4 SCSI Interface Manual, Rev. B Hex Code Message Definition 0Bh Linked Command complete with Flag This message is sent from the DAT d

SCSI Interface Description Page 21 State or Phase Description Command Phase If the drive detects a parity error while the host is transferring a CD

Page 22 DDS-4 SCSI Interface Manual, Rev. B State or Phase Description Message Out Phase If the host is in the Message Out Phase and sends a messa

SCSI Interface Description Page 23 SCSI Status Code Descriptions and Definitions The status code format is shown in the following table. A status b

Page 24 DDS-4 SCSI Interface Manual, Rev. B Attention Condition The Attention Condition allows an Initiator to inform a Target that the Initiator

SCSI Interface Description Page 25 If the Request Sense Command is received from an Initiator with a pending Unit Attention Condition before the DAT

Page 26 DDS-4 SCSI Interface Manual, Rev. B Disconnect/Reconnect Function When the drive is performing a task not requiring communication with the

SCSI Interface Description Page 27 3. When the DAT drive has successfully reselected the Initiator, it sends an Identify Message to reestablish the

Important Information About This Manual All information contained in or disclosed by this document is considered proprietary by Certance. By accepti

Page 28 DDS-4 SCSI Interface Manual, Rev. B Error Reporting Soft Errors Soft errors are generally tape-quality related and occur more frequently

SCSI Interface Description Page 29 When reading in variable mode, the host must know the size of the block to be read from the tape in advance in or

Page 30 DDS-4 SCSI Interface Manual, Rev. B Move Medium Command The SMC Move Medium command moves a cassette from one address to another by specify

SCSI Interface Description Page 31 General Operation • The Reserve and Release commands may be addressed to either LUN, but affect both LUs as a un

Page 32 DDS-4 SCSI Interface Manual, Rev. B When the magazine has been completely moved into the loader, the process of initialization begins, in w

SCSI Interface Description Page 33 The following events will NEVER cause automatic loading: • Ejection of a cleaning cassette after cleaning failed

Page 34 DDS-4 SCSI Interface Manual, Rev. B Commands Introduction This chapter describes the SCSI commands for the Seagate DDS-4 and DAT 72 tape d

Commands Page 35 Conventions The commands in this chapter are listed in alphabetical order. Each command is described; its Command Descriptor Block

Page 36 DDS-4 SCSI Interface Manual, Rev. B Command Descriptor Block Field Descriptions The command descriptor block fields are described in the fo

Commands: Erase (19h) Page 37 ERASE (19h) The ERASE command creates an EOD (end-of-recorded data) marker at the current position of the tape when th

Contents Page iii Contents Introduction 1 Overview...

Page 38 DDS-4 SCSI Interface Manual, Rev. B EXCHANGE MEDIUM (AutoLoader Only) (A6h) The EXCHANGE MEDIUM command provides a means to exchange the

Commands: Exchange Medium (A6h) Page 39 Completion Status The following table lists the completion status for the EXCHANGE MEDIUM command. Code Mess

Page 40 DDS-4 SCSI Interface Manual, Rev. B INITIALIZE ELEMENT STATUS (AutoLoader Only) (07h) The INITIALIZE ELEMENT STATUS command causes the Auto

Commands: Inquiry (12h) Page 41 INQUIRY (12h) The INQUIRY command requests that the drive return parameter information. If an INQUIRY command is rec

Page 42 DDS-4 SCSI Interface Manual, Rev. B Standard INQUIRY Data Format The following table shows the standard data format for the INQUIRY command

Commands: Inquiry (12h) Page 43 The VPD pages supported are as follows: Byte Description 0 Peripheral Device Type 1 Page Code (00h) 2 Reserved 3

Page 44 DDS-4 SCSI Interface Manual, Rev. B INQUIRY Drive Serial Number Data Format Page The following table describes the drive serial number, whi

Commands: Load/Unload (1Bh) Page 45 LOAD/UNLOAD (1Bh) The LOAD/UNLOAD command requests that the DAT drive enable or disable the logical unit for furt

Page 46 DDS-4 SCSI Interface Manual, Rev. B Completion Status The Completion Status for the LOAD/UNLOAD command is shown in the following table. Co

Commands: Locate (2Bh) Page 47 LOCATE (2Bh) The LOCATE command is used to position the tape to the specified block address in the specified partitio

Page iv DDS-4 SCSI Interface Manual, Rev. B Message-Out Phase ...

Page 48 DDS-4 SCSI Interface Manual, Rev. B LOCATE and the BT Bit Assume that the data was written on the tape as shown in the following table. Blo

Commands: Locate (2Bh) Page 49 Completion Status The Completion Status for the LOCATE command is shown in the following table. Code Message Descrip

Page 50 DDS-4 SCSI Interface Manual, Rev. B LOG SELECT (4Ch) The LOG SELECT and LOG SENSE commands are used in conjunction with each other. These c

Commands: Log Select (4Ch) Page 51 Command Descriptor Block Field Description The following table defines the fields in the CDB. Field Name Bytes B

Page 52 DDS-4 SCSI Interface Manual, Rev. B The drive presets the values as follows: • The default accumulated values are set to all 0s. • The de

Commands: Log Select (4Ch) Page 53 • Correct determination of the pages the drive uses. • Determination of the parameter codes and length of each p

Page 54 DDS-4 SCSI Interface Manual, Rev. B • If any page headers are received with unsupported page codes. (Table 4-30 lists the pages that can b

Commands: Log Select (4Ch) Page 55 issued to specify the control bytes for the threshold parameter, the accumulated Parameter Control byte is affecte

Page 56 DDS-4 SCSI Interface Manual, Rev. B set to Log Exception; and the additional sense code qualifier is set to Threshold Condition Met, 5B/01.

Commands: Log Sense (4Dh) Page 57 LOG SENSE (4Dh) The LOG SELECT and LOG SENSE commands are used in conjunction with each other. These commands allow

Contents Page v ERASE Command Descriptor Block...37 Command Descriptor Block Field D

Page 58 DDS-4 SCSI Interface Manual, Rev. B Command Descriptor Block Field Description The following table defines the fields in the CDB. Field Nam

Commands: Log Sense (4Dh) Page 59 Using Page Control Bits The Page Control (PC) bits specify the type of counts that the initiator is requesting. For

Page 60 DDS-4 SCSI Interface Manual, Rev. B command. The default threshold values are loaded into the threshold values when a reset occurs or by a

Commands: Log Sense (4Dh) Page 61 The following subsections describe the log sense pages. List of Available Pages (Page 0) Page 0 indicates the log s

Page 62 DDS-4 SCSI Interface Manual, Rev. B Byte Bits 7 6 5 4 3 2 1 0 0 MSB—Parameter Code 1 Parameter Code—LSB 2 Parameter Control 3

Commands: Log Sense (4Dh) Page 63 0004 2 Not applicable (always returns 0) 0005 8 Total bytes processed (written) 0006 2 Total uncorrectable er

Page 64 DDS-4 SCSI Interface Manual, Rev. B The total errors corrected count is incremented each time the drive recovers from a read error. This co

Commands: Log Sense (4Dh) Page 65 Additional information regarding the Tape Alert system is found in the SCSI-3 Stream Commands (SSC) Standard.

Page 66 DDS-4 SCSI Interface Manual, Rev. B The format of the Tape Alert Log Page is shown below: Byte Bits 7 6 5 4 3 2 1 0 0 1 0 0 0 0 0 0 0 0

Commands: Log Sense (4Dh) Page 67 No Flag Type Required Host Message Cause 14 Unrecoverable Snapped Tape C The operation has failed because the

Page vi DDS-4 SCSI Interface Manual, Rev. B MODE SELECT (15h) ...

Page 68 DDS-4 SCSI Interface Manual, Rev. B The following table lists the flags supported by the autoloader: No. Flag Type Required Host Messag

Commands: Log Sense (4Dh) Page 69 When a previously used cartridge is inserted, the total counts are updated to the values contained in the Tape Log

Page 70 DDS-4 SCSI Interface Manual, Rev. B Name Code Length Description Previous ECC C3 Corrections 0008 2 This count is the number of times

Commands: Log Sense (4Dh) Page 71 Data Compression Transfer Log Page (Page 39) Page 39, the Data Compression Transfer Log Page, allows you to monitor

Page 72 DDS-4 SCSI Interface Manual, Rev. B Parameter Code Length Name 073Minutes since last cleaning08 3 Power on time (minutes) 09 3 Cylind

Commands: Mode Select (15h) Page 73 MODE SELECT (15h) The MODE SELECT command allows the host to assign device parameters. After a power-on or SCSI

Page 74 DDS-4 SCSI Interface Manual, Rev. B Command Descriptor Block Field Description The following table defines the fields in the CDB. Field Nam

Commands: Mode Select (15h) Page 75 Parameter List Header Field Descriptions The following table defines the fields in the Parameter List Header. Fie

Page 76 DDS-4 SCSI Interface Manual, Rev. B Parameter List—Block Descriptor Field Descriptions The following table defines the fields in the Parame

Commands: Mode Select (15h) Page 77 The following table explains the page layout fields Field Name Bytes Description Page Code 0 The Page Code f

Contents Page vii Completion Status ...115 READ ELEMENT STA

Page 78 DDS-4 SCSI Interface Manual, Rev. B Disconnect/Reconnect Page Field Descriptions The following table describes the fields in the Disconnect

Commands: Mode Select (15h) Page 79 Control Mode Page Field Descriptions The following table describes the fields in the Control Mode page. Field Nam

Page 80 DDS-4 SCSI Interface Manual, Rev. B DC Control Page Field Descriptions The following table describes the fields in the DC Control page. Fie

Commands: Mode Select (15h) Page 81 0 0 0 | Page Code (10h) 1 Page Length (0Eh) 2 0 CAP CAF DIS RAW EN C3 N-Group 3 Act

Page 82 DDS-4 SCSI Interface Manual, Rev. B Device Configuration Page Field Descriptions The following table describes the fields in the Device Con

Commands: Mode Select (15h) Page 83 Field Name Bytes Bits Description REW bit 8 0 The default value for the REW bit is 0. The Report Early Warn

Page 84 DDS-4 SCSI Interface Manual, Rev. B Medium Partition Page Field Descriptions The following table describes the fields in the Medium Partiti

Commands: Mode Select (15h) Page 85 Tape Alert Mode Page 1C Bits Byte 7 6 5 4 3 2 1 0 0 0 0 Page Code (1Ch) 1 Page Length (0Ah) 2 Perf Reserve

Page 86 DDS-4 SCSI Interface Manual, Rev. B Test and DExcpt bits are set to one and Test Flag Number set to zero, then the MODE SELECT command will

Commands: Mode Select (15h) Page 87 (which is 5D00h for a Tape Alert event). The command that has the Check Condition shall complete without error be