Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 169)

100

101

10.4 Parameter List Header for MODE SELECT

Bit

Byte

76543210

Reserved

02 RSVD Buffered Mode Speed

03 Block Descriptor Length

Byte 02, Bits 6 through 4 - Buffered Mode

The CTS supports two data transfer modes, as follows:

000b – Unbuffered mode

001b – Buffered mode (power-on default)

In buffered mode, data from a WRITE command and filemarks or

setmarks (8500c format only) from a WRITE FILEMARKS command

are held in the CTS’s buffer until one of the following events causes

the data, filemarks, or setmarks to be written to the tape:

The motion threshold is reached.

The CTS receives one of the following commands:

•

REWIND (01h)

•

WRITE FILEMARKS (10h) non-immediate

•

SPACE (11h) in either direction

•

ERASE (19h)

•

LOAD/UNLOAD (1Bh)

•

LOCATE (2Bh) in the reverse direction

The operator presses the unload button.

The time specified for the Write Delay Time field in the Device

Configuration Page elapses (note, however, if the Write Delay

Time field is 0, a partially full buffer is not flushed to tape). See

Section 10.12 on page 10-37 for more information about the Write

Delay Time field.

In buffered mode, status is returned when the last block of data has

been transferred to the CTS’s buffer. In unbuffered mode, status is

returned only after the data has actually been written to the tape.

May 1994 EXB-8205 and EXB-8505

(Standard and XL)

10-13

10 MODE SELECT (15h) andMODE SENSE (1Ah)

1 2 ... 164 165 166 167 168 169 170 171 172 173 174 ... 445 446

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Exabyte EXB-8205 Instruções de Operação Página 169

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