Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
68
The E_D_TOV field specifies the E_D_TOV (Error Detect Timeout Value) in units of 1ns or 1ms. If the E_D_TOV Resolu-
tion bit is set to one, this field specifies E_D_TOV as a count of 1ns increments, otherwise it specifies E_D_TOV as a count of
1ms increments. It is only applicable in a point to point topology. The drive returns zero in this field. It is not interpreted or
checked.
17.3.3.2 Class Service Parameters
Since the drive only supports Class 3 service, it only checks and responds to the Class 3 Service Parameters.
Table 43:Class Service Parameters
The Service Options field contains the following flags.
• CV - Class Validity
When set to one, this flag indicates that the class of service is supported. The drive only supports Class 3, thus this bit
is only set for the Class 3 Service Parameters. If this bit is not set for Class 3 Service Parameters, the drive will
respond with an LS_RJT containing a reason code of 03h “Logical error” and a reason code explanation of 01h “Ser-
vice Parm error - Options”.
Byte BIT Default
ACC
Valu es
76543210
68 CV IM TM LDM SD DS Camp-On BufC1 80h
69 Priority Reserved 00h
Initiator Control Flags (Bytes 70-71)
70 X_ID Reassign IP Associator ACK_0 ACK_N ACK Gen DCC 00h
71 DCHBS DEC CSC Reserved 00h
Recipient Control Flags (Bytes 72-73)
72 ACK_0
Cap ACK_N
Cap X_ID Int. EP Supported Reserved Categ. Per Sequence 00h
73 DCC DCHBS DDC CSS Reserved 00h
74
75
(MSB) Receive Data-Field Size (LSB) 08h
00h
76
77
(MSB) Concurrent Sequences (LSB) 00h
FFh
78
79
(MSB) End-to-End Credit (LSB) 00h
00h
80
81
(MSB) Open Sequences per Exchange (LSB) 00h
01h
82
83
(MSB) Class 6 Multi-cast RX_ID (LSB) 00h
00h