HP 220mx Guia do Utilizador descarregar pdf (Página 70)

100

101

SCSI-2 Drive Command Set

Mode Select Command (15H)

Chapter 2 2-33

SCSI-2 Drive Commands

Mode Select Header

The Medium Type field shall be set to 00H (Default, only one medium

type supported), 02H (Write-once medium), or 03H (Optical Reversible or

Erasable medium). The Block Descriptor Length specifies the length in

bytes of the block descriptor. It shall be equal to 0 or 8. A Block

Descriptor Length of zero indicates that the block descriptor is not

included in the parameter list. This condition is not considered to be an

error.

NOTE All fields in the Block Descriptor have no effect on the drive.

Table 2-28 Mode Select Header

Byte 7 6 5 4 3 2 1 0

0 Reserved (0)

1 Medium Type

2 Reserved (0)

3 Block Descriptor Length

Table 2-29 Mode Select Block Descriptor

Byte 7 6 5 4 3 2 1 0

0 Density Code

1 Number of Blocks (MSByte)

2 Number of Blocks

3 Number of Blocks (LSByte)

4 Reserved (0)

5 Block Length (MSByte)

6 Block Length

7 Block Length (LSByte)

1 2 ... 65 66 67 68 69 70 71 72 73 74 75 ... 377 378

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