Service manual

Initialization Sequence
A-2 Revision L 96022
StorageTek Protected
Cell Audit
An audit is the process of checking each cell within a library. If a cell contains a cartridge,
the camera reads the volume number and transfers this data to the LLC card. The LLC
card calculates the robotic position of the hand assembly (by referencing the theta and Z
positions) and catalogs the cartridge location by:
•Volume number
• SCSI element number and panel, row, column
If a cell is empty, the location is recorded as “cell empty.”
During this time, the cell target positions are calibrated.
When all cell locations are read and cataloged, the library audit is complete. However, the
library audit information must be requested by the client system to update its cartridge
volume database.
This two-step process—library audit and client update—ensures that both the library and
client have current (and identical) listings of the library contents.
Notes: Cartridges left in drives will not be audited. However, volume information is
retained for drives loaded by the library.
The CAP and cleaning cartridge cells are audited later.
CAUTION:
Possible audit failure: Client software determines how unlabeled,
unreadable cartridges or cartridges placed upside down in the CAP are
handled.
Entering unlabeled and unreadable cartridges into the library should be
discouraged, because problems will arise every time the library audits
the cartridges.
Entering a cartridge upside down could result in damage to the hand
assembly and drive.
Drive Initialization
The robot moves to each drive and calculates the position of the drive’s target. This
ensures accurate and quick loading of cartridges during robotic operation.
CAP Audit
The two CAP cells are audited.
Cleaning Cartridge Cell Audit
The cleaning cartridge cell is audited.