Fujitsu MAN3367 User Manual
C141-E124-01EN
5 - 14
(1)
BUSY/QUEUE FULL status
This status indicates that the IDD is currently executing processing of another command and that a
new command cannot be received. The INIT that receives this status can reissue the original
command.
new command cannot be received. The INIT that receives this status can reissue the original
command.
Under a multi-initiator environment, when an INIT receives this status, the time until the IDD can
receive the next command depends on the operating state with other INITs, so ordinarily, it cannot
be predicted. In such a case, it is necessary for the INIT that issued the command for which this
status was received to repeatedly issue the command until it is accepted.
receive the next command depends on the operating state with other INITs, so ordinarily, it cannot
be predicted. In such a case, it is necessary for the INIT that issued the command for which this
status was received to repeatedly issue the command until it is accepted.
(2)
RESERVATION CONFLICT status
This status shows, under a multi-initiator environment, that the IDD is currently reserved by
another INIT, and cannot be used until that reserved status is released.
another INIT, and cannot be used until that reserved status is released.
The period over which the reserved status continues should be managed by the system, but
normally, an INIT that receives this status reissues the original command after waiting an
appropriate length of time. The wait time until a command is reissued is generally an inherent
value of the system and it is necessary that consideration be given to the operating states of the
other INITs in the system when deciding it.
normally, an INIT that receives this status reissues the original command after waiting an
appropriate length of time. The wait time until a command is reissued is generally an inherent
value of the system and it is necessary that consideration be given to the operating states of the
other INITs in the system when deciding it.
Of the INIT which reserved the IDD falls into a state which it cannot recover from for any reason
before the reserved state is released, it will be impossible for other INITs to access the IDD
because that reserved state will continue. In such a case, it is necessary for the INIT to take one of
the following measures to forcibly release the reserved state and recover the access right.
before the reserved state is released, it will be impossible for other INITs to access the IDD
because that reserved state will continue. In such a case, it is necessary for the INIT to take one of
the following measures to forcibly release the reserved state and recover the access right.
x TARGET RESET message
x RESET condition
(3)
Command completion wait time-out
This error is a state where the completed status for a command is not reported within the time
expected by the INIT that issued the command.
expected by the INIT that issued the command.
One cause of this error occurring, besides a malfunction of the IDD, is that the command was
cleared by some method which the INIT that issued the command cannot clearly detect, such as a
TARGET RESET message, or the command was cleared when an unrecoverable error was
detected in reconnection processing executed by the IDD, etc. When this error occurs, the INIT
should gather sense data by issuing the REQUEST SENSE command, then judge which recovery
method to use based on the contents of the sense data (see Section 5.2.2).
cleared by some method which the INIT that issued the command cannot clearly detect, such as a
TARGET RESET message, or the command was cleared when an unrecoverable error was
detected in reconnection processing executed by the IDD, etc. When this error occurs, the INIT
should gather sense data by issuing the REQUEST SENSE command, then judge which recovery
method to use based on the contents of the sense data (see Section 5.2.2).
Not only does command execution time differ widely depending on the type and specified contents
of the command, but since it has an influence on the following factors, it is necessary to give
adequate consideration to these points when setting the monitoring time value at the INIT.
of the command, but since it has an influence on the following factors, it is necessary to give
adequate consideration to these points when setting the monitoring time value at the INIT.