HP 220mx Guia do Utilizador descarregar pdf (Página 139)

100

101

SCSI-2 Drive Command Set

Read Buffer Command (3CH)

Chapter 22-102

Read Buffer Command (3CH)

This command reads data from the drive data buffer. The transfer data

consists of a 4-byte descriptor followed by the buffer data.

Mode Indicates which data format is to be used. Refer to

Table 2-91 on page 2-103 for valid values.

Buffer ID Indicates which buffer is to be used. Refer to Table 2-91

on page 2-103 for valid values.

Buffer Offset Indicates at what address the data should be written,

offset from the beginning of the buffer.

Parameter List

Length Indicates the number of data bytes to be read from the

buffer.

Table 2-90 Read Buffer Command CDB

Byte 7 6 5 4 3 2 1 0

0 Operation Code (3CH)

1 Logical Unit Number

(0)

Reserved (0) Mode

2 Buffer ID

3 Buffer Offset (MSByte)

4 Buffer Offset

5 Buffer Offset (LSByte)

6 Parameter List Length (MSByte)

7 Parameter List Length

8 Parameter List Length (LSByte)

9 Reserved (0) Flag Link

1 2 ... 134 135 136 137 138 139 140 141 142 143 144 ... 377 378

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