Spectra Logic Spectra 10000 User Manual page 54

10kdev_.book Page 42 Friday, March 12, 1999 9:44 AM
Check Condition status is reported upon receipt of a command in the following cases:
•
There is a SCSI error (bus parity error or format check) in the CDB.
•
The command is the first received by the library after a unit attention condition has
been generated (i.e. it was reset by a bus reset condition, a Bus Device Reset message
or a power-on reset). The sense key is set to Unit Attention (06h).
•
A motion command is received after a hardware error (robotics error) occurred or
when the unit has a pending Check Condition that has not been cleared.
For specific situations that return Check Condition status, refer to the command
descriptions.
Busy (08h) This status indicates that the library is busy. The library disconnects from the
SCSI bus when performing any lengthy operation (for example, a Move operation). If
any initiator attempts to send a command while the library is disconnected, it receives a
Busy status from the library.
Reservation Conflict (18h) Reservation conflict status indicates that the elements
requested for access are currently reserved by another initiator.
This status is reported until the initiator, which reserved the elements in conflict, issues
a Release command or a reset condition occurs.
Chapter 3