Quantum LTO 2U Instruções de Operação descarregar pdf (Página 155)

JULY 2007 MAGNUM 224, MAGNUM 448, STORAGELIBRARY T24, OR STORAGELOADER 2U

15-5

WHAT THE LIBRARY RETURNS

Element Type Code – Byte 00

This field indicates the specific element type (see page 15-2) being reported by

the element descriptor.

PVolTag – Byte 01, Bit 7

This field indicates if primary volume tag (bar code label) information is

present, as follows:

AVolTag – Byte 01, Bit 6

The library does not support alternate volume tags. The value reported for this

field is 0.

Element Descriptor Length – Bytes 02 and 03

This field indicates the total number of bytes contained in a single element

descriptor, as follows:

 If the descriptor being returned is for either the medium transport element

(the cartridge loader) or a storage element (cartridge cell), the length is either

52 bytes (if the VolTag bit is 1) or 16 bytes (if the VolTag bit is 0).

 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 15-1.

02 (MSB)

Element Descriptor Length

(LSB)

04 Reserved

05 (MSB)

Byte Count of Descriptor Data Available

(LSB)

0 Volume tag bytes are omitted from the element descriptors

1 Volume tag information is present

Table 15-1 Element descriptor length for the data transfer element

DVCID VolTag S/N Req Element Descriptor Length (bytes)

000 16

001 26

010 52

011 62

100 62

1 2 ... 150 151 152 153 154 155 156 157 158 159 160 ... 263 264

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