Quantum DLT 4000 Handbuch Seite 92

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Messages
4-4 Quantum DLT 4000 Tape Drive
Bit
Byte
7 6 5 4 3 2 1 0
0 Extended Message (01h)
1 Extended Message Length
2 Extended Message Code
3 to n-1 Extended Message Arguments
Figure 41 Extended Message - Data Format
Table 43 Extended Message - Field Description
Field Description
Extended Message
Length
This field specifies the length, in bytes, of the Extended
Message Code plus the Extended Message Arguments that
follow. Therefore, the total length of the message is equal to
the Extended Message Length plus 2.
A value of 0 for the Extended Message Length indicates that
256 bytes follow.
Extended Message Code The drive supports some Extended Messages. They are:
01h SYNCHRONOUS DATA TRANSFER REQUEST
80h – FFh Vendor Unique (for more information, refer to the
section for the INQUIRY command in Chapter 5).
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