Hitachi HCS721016CLA382 User Manual
Hitachi hard disk drive specifications
78
9.17.3.2
Counter Identifiers
Each counter begins with a 16-bit identifier. 0 defines the counter value for each identifier. Any unused counter
slots in the log page should have a counter identifier value of 0h.
Optional counters that are not implemented shall not be returned in log page 11h. A value of „0‟ returned for a
counter means that there have been no instances of that particular event. There is no required ordering for event
counters within the log page; the order is arbitrary and selected by the device vendor.
For all counter descriptions, „transmitted‟ refers to items sent by the device to the host and „received‟ refers to
items received by the device from the host.
Bits 14:12 of the counter identifier convey the number of significant bits that counter uses. All
counter values consume a multiple of 16-bits. The valid values for bits 14:12 and the
corresponding counter sizes are:
slots in the log page should have a counter identifier value of 0h.
Optional counters that are not implemented shall not be returned in log page 11h. A value of „0‟ returned for a
counter means that there have been no instances of that particular event. There is no required ordering for event
counters within the log page; the order is arbitrary and selected by the device vendor.
For all counter descriptions, „transmitted‟ refers to items sent by the device to the host and „received‟ refers to
items received by the device from the host.
Bits 14:12 of the counter identifier convey the number of significant bits that counter uses. All
counter values consume a multiple of 16-bits. The valid values for bits 14:12 and the
corresponding counter sizes are:
1h 16-bit counter
2h 32-bit counter
3h 48-bit counter
4h 64-bit counter
2h 32-bit counter
3h 48-bit counter
4h 64-bit counter
Any counter that has an identifier with bit 15 set to one is vendor specific. This creates a vendor specific range of
counter identifiers from 8000h to FFFFh. Vendor specific counters shall observe the number of significant bits
14:12 as defined above.
Identifier
(Bits 11:0)
(Bits 11:0)
Mandatory /
Optional
Description
000h
Mandatory
No counter value; marks end of counters in the page
001h
Mandatory
Command failed and ICRC bit set to one in Error register
002h
Optional
R_ERR response for Data FIS
003h
Optional
Not supported (R_ERR response for Device-to-Host Data FIS)
004h
Optional
Not supported (R_ERR response for Host-to-Device Data FIS)
005h
Optional
R_ERR response for Non-data FIS
006h
Optional
Not supported (R_ERR response for Device-to-Host Non-data FIS)
007h
Optional
Not supported (R_ERR response for Host-to-Device Non-data FIS)
008h
Optional
Not supported (Device-to-Host non-Data FIS retries)
009h
Optional
Transitions from drive PhyRdy to drive PhyNRdy
00Ah
Mandatory
Signature Device-to-Host Register FISes sent due to a COMRESET
00Bh
Optional
CRC errors within a Host-to-Device FIS
00Dh
Optional
Non-CRC errors within a Host-to-Device FIS
00Fh
Optional
Not supported (R_ERR response for Host-to-Device Data FIS due to CRC
errors)
errors)
010h
Optional
Not supported (R_ERR response for Host-to-Device Data FIS due to
non-CRC errors)
non-CRC errors)
012h
Optional
Not supported (R_ERR response for Host-to-Device Non-data FIS due to
CRC errors)
CRC errors)
013h
Optional
Not supported (R_ERR response for Host-to-Device Non-data FIS due to
non-CRC errors)
non-CRC errors)
Table 39 Phy Event Counter Identifiers