Fujitsu MBC2073RC, MBC2036RC, MBA3300RC Commands cleared by another Init, Logical Unit Reset

Command Processing

(4) Commands cleared by another INIT

If the following events have occurred, the command which is currently being executed and commands in the queue are cleared, and this Unit Attention condition is generated.

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The CLEAR TASK SET is issued by any INIT.

An INIT reports an error when the QErr bits of MODE SELECT parameter page A are set to "01'.

However, the INITs that have issued CLEAR TASK SET and the INITs that have reported errors do not enter the Unit Attention condition holding state.

2.4.2 Response and release condition at UNIT ATTENTION condition hold state

A Unit Attention condition generated by the HDD due to the occurrence of one of the above-mentioned events is held for each INIT individually, and this condition is held until the Unit Attention condition is cleared by an INIT which is the object of the hold issues the commands specified below.

When the HDD is holding the Unit Attention condition, if it receives a command from an INIT which is the object of the hold, one of the operations below, depending on the type of command issued, is performed by the HDD.

(1)Commands other than the INQUIRY, REQUEST SENSE, and REPORT LUNS commands

The HDD reports the CHECK CONDITION status in response to the issued command. Through the CHECK CONDITION status report, the Unit Attention condition with respect to that INIT is cleared. The sense key for the sense data generated at this time is UNIT ATTENTION [= 6] and the additional sense code shows the event which generated the Unit Attention condition, as shown below.

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∙

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∙

∙

∙

∙

∙

∙

∙

Power on	[=29-01]
Hard Reset	[=29-02]
LOGICAL UNIT RESET	[=29-03]
Internal Reboot	[=29-04]
I-T Nexus Loss Occurred	[=29-07]
Mode parameters changed	[=2A-01]
Reservations Preempted	[=2A-03]
Reservations Released	[=2A-04]
Registrations Preempted	[=2A-05]
Commands cleared by another INIT	[=2F-00]
Micro code has been change	[=3F-01]
Changed Operating Definition	[=3F-02]
Device Identifier Changed	[=3F-05]

However, if the HDD responds with a TASK SET FULL because the issued command is not received, the Unit Attention condition is not cleared.

112 C141-C013