Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 173)

100

101

10.6 Block Descriptor

Bit

Byte

76543210

00 Density Code

01 (MSB)

Number of Blocks

03 (LSB)

04 Reserved

05 (MSB)

Block Length

07 (LSB)

Byte 00 - Density Code

In the MODE SELECT command, the Density Code field specifies the

format in which you want the CTS to write data to tape. In the

MODE SENSE command, the Density Code field identifies the

current operating density of the CTS.

Table 10-8 lists the valid values for the Density Code.

Note: Refer to Section 10.18 on page 10-61 for examples of using the

CTS to write, read, and append data in the various tape

formats it supports. Refer to page 10-68 in that section if you

want to change the Density Code and you cannot issue MODE

SELECT commands.

Restrictions for Setting the Density Code:

The entire tape must be written in the same format. That is,

the Density Code applies to the entire tape, not to individual

blocks and files. You can change the Density Code only when

the tape is logically positioned at LBOT.

For read operations, the CTS automatically determines the

correct format.

A blank tape written before the first MODE SELECT

command will be written in the power-on default format.

May 1994 EXB-8205 and EXB-8505

(Standard and XL)

10-17

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

1 2 ... 168 169 170 171 172 173 174 175 176 177 178 ... 445 446

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