Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 164)

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10.3 Field Definitions for MODE SENSE CDB

Byte 01, Bit 3 - DBD (Disable Block Descriptor)

The Disable Block Descriptor bit indicates whether the initiator wants

the 8-byte Block Descriptor returned as part of the MODE SENSE

parameter data. This bit is defined as follows:

0 – Send the Block Descriptor

1 – Do not send the Block Descriptor

Note: TheDBDbitmustbe0ifthePageCodeis0(non-page

format). Otherwise, the CTS returns Check Condition status

with a sense key of Illegal Request (5h). When the Page Code

is 0, use the Allocation Length field in the CDB to specify

whether the Block Descriptor is returned (see Table 10-5).

Byte 02, Bits 7 and 6 - PC (Page Control)

The Page Control field indicates the type of MODE SENSE parameter

data to be returned. The CTS supports the following values:

00h – Return current values. These are the parameters set by the last

successful MODE SELECT command, or the power-on default

values if a MODE SELECT command has not been executed

since the last power-on reset, SCSI bus reset, or Bus Device

Reset message.

01h – Return changeable values. All values that are changeable are

indicatedby1sineachbitofthechangeablefield.

Note: This field is used only for page format and must be 00h for

non-page format.

Byte 02, Bits 5 through 0 - Page Code

The Page Code field indicates which MODE SENSE parameter page

or pages the initiator is requesting. A value of 0 for this field indicates

that the parameters will be returned in non-page format.

Table 10-4 lists the values supported by the CTS for the Page Code

field.

10-8

EXB-8205 and EXB-8505

(Standard and XL)

510503

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

1 2 ... 159 160 161 162 163 164 165 166 167 168 169 ... 445 446

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Exabyte EXB-8205 Instruções de Operação Página 164

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