Quantum LTO 2U Instruções de Operação descarregar pdf (Página 192)

19-6

SCSI REFERENCE 1014826

CHAPTER 19—REQUEST VOLUME ELEMENT ADDRESS (B5h)

 If the descriptor being returned is for a data transfer element (a tape drive),

the element descriptor length changes depending on the setting of the

DVCID, VolTag, and S/N Req bits, as shown in Table 19-1.

Byte Count of Descriptor Data Available – Bytes 05 through 07

This field indicates the total number of bytes of element descriptor data

available for the elements of this element type that meet the CDB

requirements. This value is not adjusted to match the value that you specified

for the Allocation Length field. This value is the Element Descriptor Length

multiplied by the number of element descriptors.

19.3.3 ELEMENT DESCRIPTORS

The following sections contain the field definitions for the types of elements in

the library:

 Medium transport element: The cartridge loader

 Storage elements: The cartridge cells

 I/E port element: The cartridge access port

 Data transfer element: The tape drives

Each element descriptor includes the element address and status flags. Each

element descriptor may also contain sense code information as well as other

information, depending on the element type.

Notes:

 The element descriptors for the types of elements are very similar, with the

exception of a few of the fields. Note the differences in bytes 06 and 07.

 The library does not support alternate volume tags. This information is not

included in any of the element descriptors.

Table 19-1 Element descriptor length for the data transfer element

VolTag Element Descriptor Length (bytes)

016

152

1 2 ... 187 188 189 190 191 192 193 194 195 196 197 ... 263 264

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