10.1.2.1 Synchronous Negotiation started by the Initiator
When the drive responds with REQ/ACK offset value of 0, the initiator shall use asynchronous data
transfer mode.
LVD mode. The drive responds to each Initiator requested transfer period as shown below
.
Asynch
(Asynch mode)
Mt = 50
51 <= Mi <= 255
Fast-5
200
Mt = 50
26 <= Mi <=
50
Fast-10
100
Mt = 25
13 <= Mi <=
25
Fast-20
50
Mt = 12
11 <= Mi <=
12
Fast-40
25
Mt = 10
10 <= Mi <=
10
Fast-40
25
Mt = 10
0 <= Mi <=
09
Transfer Rate
Target Transfer
Period (ns)
Target
Response
Initiator Request
Figure 179. Initiator Request/Drive Response (LVD mode)
SE mode. The drive responds to each Initiator requested transfer period as shown below.
Asynch
(Asynch mode)
Mt = 50
51 <= Mi <= 255
Fast-5
200
Mt = 50
26 <= Mi <=
50
Fast-10
100
Mt = 25
13 <= Mi <=
25
Fast-20
50
Mt = 12
12 <= Mi <=
12
Fast-20
50
Mt = 12
0 <= Mi <=
11
Transfer Rate
Target Transfer
Period (ns)
Target
Response
Initiator Request
Figure 180. Initiator Request/Drive Response (SE mode)
Ultrastar 146Z10 hard disk drive specifications
179
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