Quantum SuperLoader Guida Utente Pagina 89

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Chapter 3 Media Changer Commands
Mode Select (6) / (10) Command (15h / 55h)
Quantum ATL SuperLoader Software Interface Guide 71
Table 29 Mode
Select Parameter
Header
Mode Parameter Block Descriptor 3
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.
Figure 37 Mode
Select Parameter
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
0
Reserved
1 - 3
(MSB)
Number of Blocks
(LSB)
4
Reserved
5 - 7
(MSB)
Block Length
(LSB)
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