Quantum LTO 2U Betriebsanleitung PDF herunterladen (Seite 152)

15-2

SCSI REFERENCE 1014826

CHAPTER 15—READ ELEMENT STATUS (B8h)

15.2 WHAT YOU SEND TO THE LIBRARY

VolTag – Byte 01, Bit 4

This bit indicates whether you want the library to return volume tag (bar code

label) information in response to this command, as follows:

Element Type Code – Byte 01, Bits 3 through 0

This field specifies the particular element types you want the library to report

on. The library supports the following Element Type Codes:

For an Element Type Code of 0h, the element types are reported in element

address order, beginning with the Starting Element Address.

Starting Element Address – Bytes 02 and 03

This field indicates the element address at which to start the transfer of data.

Only elements with addresses greater than or equal to the starting address are

reported. Element descriptor blocks are not generated for undefined element

addresses.

Number of Elements – Bytes 04 and 05

This field specifies the maximum number of element descriptors to be

returned. This is an actual number of element descriptors to be returned, not

an element address range.

The library returns element descriptors of the requested element type starting

with the first element address equal to or greater than the value in the Starting

Element Address field.

CURDATA – Byte 06, Bit 1

The CURDATA (current data) bit determines whether the library allows device

motion in order to update element status, as follows:

0 Do not return volume tag (bar code label) information

1 Return volume tag (bar code label) information

0h All element types

1h Medium Transport Element (cartridge loader)

2h Storage Element (cartridge cells)

3h I/E Port Element (cartridge access port)

4h Data Transfer Element (tape drives)

0 May use motion to confirm device status

1 May not use motion; must use currently available data

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Quantum LTO 2U Betriebsanleitung Seite 152