Message Parity Error (09); Linked Task Complete (0A); Linked Task Complete With Flag (0B); Target Reset (0C) - Hitachi HUS151473VL3800 - Ultrastar 73.4 GB Hard Drive Specifications

This message is ignored by the drive and will not affect any operation.

19.1.12 Message Parity Error (09)

This message is sent from the Initiator to inform the drive that the last message byte received had a parity error.
If the Initiator intends to send this message, the Initiator must assert the ATN signal prior to its release of ACK for the REQ/
ACK handshake of the message byte that has the parity error. This provides an interlock so the drive can determine which mes-
sage byte has the parity error.
If the drive receives this message under any other circumstance, the drive will change to BUS FREE to signal a catastrophic
error. After receiving this message, the drive will retry sending the previous message to the Initiator.

19.1.13 Linked Task Complete (0A)

The drive sends this message to the Initiator to indicate that execution of a linked command (with flag bit equal to zero) has
completed and that valid status has been sent to the Initiator. After successfully sending this message, the drive goes to COM-
MAND phase to receive the next command.

19.1.14 Linked Task Complete With Flag (0B)

The drive sends this message to the Initiator to indicate that the execution of a linked command with flag bit set to one has
completed and that valid status has been sent to the Initiator. After successfully sending this message, the drive goes to COM-
MAND phase to receive the next command.

19.1.15 Target Reset (0C)

This message is sent from an Initiator to direct the drive to clear all current commands. This message forces a hard reset condi-
tion, which will reset the drive to an initial state with no operations pending for any Initiator. After receiving this message the
drive will go to the BUS FREE phase.

19.1.16 Abort Task (0D)

When the Target successfully receives this message, it clears the current I/O process and goes to Bus Free. If the Target has
already started execution of an I/O process, the execution will be halted.
Pending status, data, and commands for other active or queued I/O processes shall not be affected.

19.1.17 Clear Task Set (0E)

All I/O processes for all Initiators shall be cleared. All active I/O processes shall be terminated. The Target shall go to the Bus
Free phase following successful receipt of this message.

19.1.18 Logical Unit Reset (17)

This message is sent from an Initiator to direct the drive to clear all current commands and enter an initialized state with no
operations pending for any Initiator. This message forces a reset similar to the Target Reset message, with the exception that
initiator negotiated parameters (like interfaces speed and related options) are not reset, but are preserved.
Hitachi Ultrastar 15K147 SCSI Hard Disk Drive Specification
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