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SCSI Commands

Quantum DLT 4000 Tape Drive 5-9

Table 5–5 Length Field Name Units

Field Name Units Implied

Allocation Length Bytes of data the drive is allowed to send to the initiator

Parameter List Length Bytes of data the initiator has available for the drive

Transfer Length Logical number of data blocks or data bytes the initiator

wants transferred or verified

Byte Transfer Length Bytes of data the initiator wants transferred

The DATA OUT column in Table 5–6 lists the information passed to the drive

by the initiator as part of the command. The DATA IN column lists the

information sent to the initiator by the drive. Numbers in parentheses after an

item indicate the item’s length in bytes. In some cases, additional length

information is communicated during the DATA phase.

Table 5–6 DATA-Phase Command Contents

Command Length in CDB Data Out (To Drive) Data In (To Initiator)

ERASE 0

INQUIRY Allocation --- Standard Inquiry or a

Vital Product Data

page

LOAD UNLOAD 0 --- ---

LOCATE 0 --- ---

LOG SELECT Parameter List

(must be 0)

--- ---

LOG SENSE Allocation --- Log Page

MODE SELECT (6) Parameter List Mode Parameter

Header (4) Block

Descriptor (8)

Page(s)

---

MODE SENSE (6) Allocation --- Mode Parameter

Header (4) Block

Descriptor (8)

Page(s)

1 2 ... 104 105 106 107 108 109 110 111 112 113 114 ... 299 300

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Quantum DLT 4000 Manual Página 109