Viper 60s Theory Of Operation And Maintenance Manual page 7

VIPER SCSI 60. 125 & 150 THEORY OF OPERA TlON AND MAINTENANCE
Chapter 5
Viper SCSI Commands ............................................................................................................ 5-1
5.1 Introduction ......................................................................................................................... 5-1
5.2 Descriptor Block .................................................................................................................. 5-2
5.2.1 Command Descriptor Block Format ...................................................................... 5-2
5.2.2 Command Descriptor Block Field Descriptions ................................................... 5-2
5.2.3 Flag and Link Bit Descriptions ................................................................................ 5-3
5.3 TEST LTNIT READY (OOh) .................................................................................................. 5-4
5.3.1 TEST UNIT READ Command Descriptor Block .................................................. 5-4
5.3.2 Completion Status ..................................................................................................... 5-4
5.4 REWIND (Olh) .................................................................................................................... 5-5
5.4.1 REWIND command Descriptor Block ................................................................... 5-5
5.4.2 Command Descriptor Block Field DescriAtion .................................................... 5-5
5.4.3 Completion Status ..................................................................................................... 5-5
5.5 REQUEST BLOCK ADDRESS (02h) ................................................................................ 5-6
5.5.1 REQUEST BLOCK ADDRESS Command Descriptor Block .............................. 5-6
5.5.2 Command Descriptor Block Field .......................................................................... 5-6
5.5.3 REQUEST BLOCK ADDRESS Data Format ......................................................... 5-6
5.5.4 REQUEST BLOCK ADDRESS Data Field Description ........................................ 5-7
5.5.5 Completion Status ..................................................................................................... 5-7
5.6 REQUEST SENSE ( 03h ) ................................................................................................... 5-S
5.6.1 REQUEST SENSE Command Descriptor Block ................................................... 5-S
5.6.2 Command Descriptor Block Field Description .................................................... 5-S
5.6.3 Extended Sense Data Format .................................................................................. 5-9
5.6.4 Extended Sense Data Field Descriptions ............................................................. 5-10
5.6.4 Extended Sense Data Field Descriptions Continued .......................................... 5-11
5.6.5 Priority and Definition of Sense Keys ................................................................... 5-12
5.6.6 Completion Status .................................................................................................... 5-13
5.7 READ BLOCK LIMITS (05h) ........................................................................................... 5-14
5.7.1 READ BLOCK LIMITS Command DeSCriptor Block ......................................... 5-14
5.7.2 Command Descriptor Block Field Descriptions .................................................. 5-14
5.7.3 READ BLOCK LIMITS Data Format.. ................................................................... 5-14
5.7.4 Completion Status .................................................................................................... 5-15
5.8 READ (aSh) ......................................................................................................................... 5-16
5.8.1 READ Command Descriptor Block ....................................................................... 5-16
5.8.2 Command Descriptor Block Field Descriptions .................................................. 5-16
5.S.3 READ Command Description ................................................................................ 5-16
5.8.3.1 End of Data ...................................................................................................... 5-17
5.S.3.2 Filen·lark., ....................................................................................................... 5-17
5.8.3.3 Transfer Length Satisfied .............................................................................. 5-17
5.8.3.4 End of Tape (EOT) .......................................................................................... 5-17
5.8.3.5 Unrecoverable Data Error ............................................................................. 5-17
5.8.4 Completion Status .................................................................................................... 5-18
5.9 WRITE (OAh) ...................................................................................................................... 5-19
5.9.1 WRITE Command Descriptor Block ..................................................................... 5-19
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