User Guide

Ampex 1308904-X4 Preliminary Draft 3-11
ACL Application Programmer’s Guide Operational Status
• The ACL is powered on.
• A SCSI hard reset or Bus Device Reset message is received.
• ACL door status changes from open to closed.
• The ACL is placed in the SCSI mode after being operated in a manual mode.
When desired, an initiator can use the aclInit() function or the acl_init_chs utility to force the
ACL to perform an initialization routine. A related function, aclRezero(), resets the CHS and
directs the ACL to check element status; if a discrepancy is found, the ACL automatically
re-initializes to update its internal database.
3.7.3 Read Element Status
You can use the following functions and utilities to retrieve current ACL element status from
the internal database:
• aclAuditElement() and acl_audit_element retrieve the status of a single element.
• aclAuditLibrary() and acl_audit_library retrieve the status of all elements.
The aclAuditElement() and aclAuditLibrary() functions return the following information
for the various elements:
Transport Element Element address—address of the CHS
Door status—open or closed
CHS location (2XX, 4XX)—parked or the address of the
storage bin positioned in front of the tape drive
CHS location (8XX)—the location name of the element at
which the cartridge handler is positioned.
Storage Element Element address—address of the storage element (bin) for
which status is being reported
CHS access permission—allowed or disallowed
Element state—normal or abnormal
Empty or full—tape cartridge present or not
Tape cartridge volume tag—bar code ID
Tape cartridge size