Chapter 2. Initialize Element Status-07H; Command Description; Table 2-1: Initialize Element Status Command-07H - Spectra Logic Spectra 2k Develop Manual

2 Initialize Element Status—07h

Command Description

The INITIALIZE ELEMENT STATUS command instructs the library to take an inventory if its
elements. The library does this by moving the tape picker across the front of the data
cartridge magazine. The tape picker houses an inventory sensor, which collects
element status information. If a bar code reader is installed in the library, it scans the
bar codes of the cartridges as part of the element status inventory.
The library stores the element status information in nonvolatile RAM. It sends the
element status information to an initiator in response to the READ ELEMENT STATUS
command.
Note:
The library automatically performs and stores an element inventory
upon power-up, as well as each time the library's front door is
opened and closed. Element status information is also updated
when the tape picker moves media from one element to another.
If a cartridge is in Drive 2 when the library takes inventory, its bar code cannot be
scanned. The library indicates this condition by setting an EXCEPT bit in the drive's
element descriptor to indicate that the drive is in an abnormal state. See Chapter 10.
Read Element Status—B8h for details.
Table 2-1: Initialize Element Status Command—07h
Bit
Byte
7
00
01 Logical Unit Number (0h)
02
03
04
05 0
The library returns no data to the INITIALIZE ELEMENT STATUS command. To get information on
the status of elements, issue a READ ELEMENT STATUS command.
6 5 4
Operation code—07h
0
3 2
Reserved
Reserved
Reserved
Reserved
Reserved
13
1 0
0 0