Hitachi HUS154530VLF400 User Manual
Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
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17.2.2 Basic accept (BA_ACC)
BA_ACC indicates that a Basic Link Service Request has been completed. The drive only sends a BA_ACC in response to an
ABTS Basic Link Service.
ABTS Basic Link Service.
Table 29: BA_ACC Payload
•
SEQ_ID Validity specifies whether the SEQ_ID field in the BA_ACC payload is valid or not. The drive always sets
this field to 00h.
•
SEQ_ID specifies the last SEQ_ID which is deliverable to the Upper Level Protocol. Since the drive uses the ABTS
protocol to abort an entire exchange, this field is unused. The drive sets this field to 00h.
•
OXID specifies the OXID of the exchange that has been aborted by the drive.
•
RXID specifies the RXID of the exchange that has been aborted by the drive.
•
Low SEQ_CNT specifies the last data frame of the last delivered sequence. Since the drive aborts the entire
exchange, this field is set to 0000h.
•
High SEQ_CNT is only valid when an ABTS is used to abort a single sequence. Since the drive only supports abort-
ing of entire exchanges, this field is set to 0000h.
Byte Item
Size
(Bytes)
0
SEQ_ID Validity (80h = valid, 00h = invalid)
1
1
SEQ_ID 1
2
3
Reserved 2
4
5
OX_ID 2
6
7
RX_ID 2
8
9
Low SEQ_CNT
2
10
11
High SEQ_CNT
2