Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification

17.6.7

Transport Layer Error Handling

This section defines the Transport layer error handling by the drive.

Table 56 Transport Layer Error Handling

Error Error Handling Procedure

SSP Header Field Checking

Reserved fields in SSP frames are not checked.

Data Offset Error

If a DATA frame with an invalid Data Offset is received, the command

associated with the DATA frame is aborted with Check Condition status and

sense data corresponding to a DATA OFFSET ERROR is returned

I_T NEXUS Loss Timeout

If a connection cannot be established to an Initiator before the I_T NEXUS

LOSS timer expires (Mode Page 0x19), all commands from the Initiator are

internally aborted. The first new command received from the affected

Initiator results in a CHECK CONDITION with sense data corresponding to

I_T NEXUS LOSS OCCURRED.

Initiator Response Timeout

If DATA frames corresponding to an outstanding XFER_RDY frame are not

received before the Initiator Response timer expires (Mode Page 0x19), the

command is aborted with CHECK CONDITION status and sense data

corresponding to INITIATOR RESPONSE TIMEOUT is returned for the

affected command.

Data Overflow

If more data is received than requested via an XFER_RDY frame, the

affected command is aborted with CHECK CONDITION status with sense

data corresponding to TOO MUCH WRITE DATA is returned.

Invalid Target Port Transfer Tag

If a DATA frame is received and the TPTT is not set to the value used in the

corresponding XFER_RDY frame, the frame is discarded. If a COMMAND

or TASK frame is received with the TPTT set to a value other than 0xFFFF,

a RESPONSE frame with RESPONSE_DATA set to INVALID FRAME is

returned.

Invalid Frame Length

If a DATA frame is received with zero bytes of payload data, the frame is

discarded. This is not considered an error. If a COMMAND/TASK frame that

is too short is received, RESPONSE data corresponding to INVALID

FRAME is returned. The additional CDB length field of a COMMAND frame

is not checked for correctness. If a DATA frame is received with a payload

greater than 1024 bytes, the frame is discarded and the command is

aborted with CHECK CONDITION status and sense data corresponding to

DATA_PHASE_ERROR is returned.