Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
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- set to Bh when the PHY is enabled and the negotiated speed is 12.0G
 The Generation Code is a one-byte counter that shall be incremented by one by the device server every
time the values in this mode page or the SAS-3 PHY mode page field values are changed. A GENERATION
CODE field set to 00h indicates the generation code is unknown. The device server shall wrap this field to
01h as the next increment after reaching its maximum value (i.e., FFh). The GENERATION CODE field is
also contained in the Protocol-Specific Port log page and may be used to correlate PHY settings across
mode page and log page accesses.
 Attached Reason indicates the value of the REASON field received in the IDENTIFY address frame.
 Attached Initiator Port set to the value received by this PHY during an Identify Sequence.
 Attached Target Port set to the value received by this PHY during an Identify Sequence.
 SAS ADDRESS contains the SAS address transmitted by this PHY during an Identify Sequence.
 Attached SAS ADDRESS contains the SAS address received by this PHY during an Identify Sequence.
 Attached PHY Identifier contains the SAS PHY Identifier received by this PHY during an Identify
Sequence.
 Invalid Dword Count indicates the number of invalid Dwords that have been received outside of PHY reset
sequences. The count wraps at the maximum value.
 Running Disparity Error Count increments by one when the port has acquired Dword synchronization and
detects a transmission word containing a running disparity error at the receiver. When the port has lost
Dword synchronization, the Running Disparity Error Count is not incremented. The count stops at the
maximum value.
 Loss of Dword Synchronication indicates the number of times the PHY has lost Dword synchronization
and restarted the link reset sequence of PHY reset sequences. The count wraps at the maximum value.
 PHY Reset Problem indicates the number of times the PHY reset sequence has failed due to a failure to
gain Dword sync in the retry speed match speed negotiation. The count wraps at the maximum value.
 PHY Event Descriptor Length indicates the number of bytes in the PHY event descriptor, which is 0Ch.
 Number of Event Descriptors indicates the number of PHY event descriptors in the PHY event descriptor
list, which is 04h.
 Event Source (01h) - Invalid Dword Count. The "PHY Event" field following this event source contains
the number of invalid Dwords detected by the PHY since power on. The "Peak Value Detector Threshold"
is set to 00000000h to indicate this is a counter and not a peak value detector.
 Event Source (02h) - Running Disparity Error Count. The "PHY Event" field following this event source
contains the number of disparity errors detected by the PHY since power on. The "Peak Value Detector
Threshold" is set to 00000000h to indicate this is a counter and not a peak value detector.
 Event Source (03h) - Loss of Dword Synchronization Count. The "Phy Event" field following this event
source contains the number of times the receiver has lost Dword synchronization since power on. The
"Peak Value Detector Threshold" is set to 00000000h to indicate this is a counter and not a peak value
detector.
 Event Source (04h) - PHY Reset Problem Count. The "PHY Event" field following this event source
contains the number of times the PHY has encountered a PHY reset problem condition since power on.
The "Peak Value Detector Threshold" is set to 00000000h to indicate this is a counter and not a peak value
detector.