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Chapter 2 Media Changer Commands

Mode Select (6) / (10) Command (15h / 55h)

Quantum SuperLoader 3 Software Interface Guide 45

Table 21 Mode Select

Parameter Header

Mode Parameter Block Descriptor 2

The figure and table that follow provide an illustration and description of

the fields that make up the

MODE SELECT command’s Mode Parameter

Block Descriptor

Reserved

4 - 5

Reserved

6 - 7

Block Descriptor Length

Field Name Description

Block

Descriptor

Length

This field specifies the length in bytes of all the block

descriptors. Since the media changer only allows one

block descriptor, the value must be either 0 or 8. A

value of 0 indicates no block description is included;

a value of 8 indicates a block descriptor is present and

precedes the mode page data. Any other value other

than 0 or 8 causes a

CHECK CONDITION status with

sense key of

ILLEGAL REQUEST to be returned.

Bit

Byte76543210

1 2 ... 56 57 58 59 60 61 62 63 64 65 66 ... 159 160

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Quantum SuperLoader 3 Guida Utente Pagina 61