Quantum LTO 2U Instrukcje Operacyjne Strona 153

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JULY 2007 MAGNUM 224, MAGNUM 448, STORAGELIBRARY T24, OR STORAGELOADER 2U
15-3
WHAT THE LIBRARY RETURNS
DVCID – Bytes 06, Bit 0
The DVCID (device ID) bit indicates whether the library appends the device
identifier for the tape drive, if available, to the standard data transfer element
descriptor, as follows:
Allocation Length – Bytes 07 through 09
This field specifies the length in bytes of the space that you are allocating for
returned element descriptors. Only complete element descriptors are
returned. The library returns element descriptors until one of the following
conditions is met:
All available element descriptors have been returned.
The number of element descriptors specified in the Number of Elements
field has been returned.
The remaining allocation length is smaller than the next complete element
descriptor or header to be returned.
S/N Request – Byte 11, Bit 7 (Obsolete)
Note: This field is obsolete and only retained for compatibility. The DVCID field
should be used to match drives to libraries (see DVCID – Bytes 06, Bit 0).
This bit indicates whether the library appends the ten-byte tape drive serial
number to the standard data transfer element descriptor, as follows:
15.3 WHAT THE LIBRARY RETURNS
This section describes the Element Status page structure and the element
descriptors that the library supports. The Element Status page begins with an
eight-byte Element Status Header, followed the requested element descriptors.
0 Do not append the device identifier
1 Append the device identifier
0 Do not append the tape drive serial number
1 Append the tape drive serial number
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