Write Filemarks Command 10h | Quantum Instruments DLT 7000 specification

SCSI Commands

5.27 WRITE FILEMARKS COMMAND (10h)

The WRITE FILEMARKS command directs the tape drive to write the specified number of Filemarks beginning at the current logical position on tape. If the Immediate bit is not set, any data or Filemarks in the WRITE cache buffer are written to tape.

Bit

Byte

Operation Code (10h)

Logical Unit Number

Reserved

WSMk

Immed

(0)

(MSB)

2 - 4

Number of Filemarks

(LSB)

Unused

Reserved

Flag

Link

Figure 5–83 WRITE FILEMARKS Command Descriptor Block - Data Format

Table 5–84 WRITE FILEMARKS Command Data - Field Descriptions

Field Name

Description

WSmk

Write Setmark. Must be 0. This tape drive does not support Setmarks.

Immed

Immediate. When this bit is set to 1, the tape drive returns status as soon as the

Command Descriptor Block (CDB) has been validated, unless the Filemark count

is 0, or greater than 1 (since either condition causes the WRITE buffer to be

flushed to tape medium).

When set to 0, this bit indicates the status will not be returned until the

operation is complete.

Number of

This field contains the number of consecutive Filemarks to be written to tape

Filemarks

medium. A value of 0 is not considered to be an error; GOOD status is returned.

Quantum DLT 7000 Tape System

5-173

DLT 7000 specifications

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Quantum Instruments DLT 7000 manual Write Filemarks Command 10h

Models: DLT 7000