Initiator Request/Target Response (Scsi Fast); Target Response To Initiator's Transfer Period - IBM DCAS-32160 - Ultrastar 2.1 GB Hard Drive Specifications

Initiator Target
Request Response
0 <= Mi <= 25 Mt = 25
26 <= Mi <= 31 Mt = Mi
32 <= Mi <= 37 Mt = Mi
38 <= Mi <= 43 Mt = Mi
44 <= Mi <= 50 Mt = Mi
51 <= Mi <= 56 Mt = Mi
57 <= Mi <= 62 Mt = Mi
63 <= Mi <= 68 Mt = Mi
69 <= Mi <= 75 Mt = Mi
76 <= Mi <= 81 Mt = Mi
82 <= Mi <= 87 Mt = Mi
88 <= Mi <= 93 Mt = Mi
94 <= Mi <= 100 Mt = Mi
101 <= Mi <= 106 Mt = Mi
107 <= Mi <= 112 Mt = Mi
113 <= Mi <= 118 Mt = Mi
119 <= Mi <= 255 Mt = Mi
Figure 124. Initiator Request/Target Response (SCSI Fast)
9.1.2.2 Synchronous Negotiation Started by the Target
If the file recognizes that negotiation is required, the file sends a SDR message to the initiator with transfer
period equal to 200 nSec (M = 50). The file interprets the Initiator corresponding transfer period as shown
in the following figure Figure 125:
Target
Initiator's Transfer
Response Period
0 <= Mi <= 24 Send Message Reject(Async mode)
Mi = 25 100 nSec
26 <= Mi <= 31 125 nSec
32 <= Mi <= 37 150 nSec
38 <= Mi <= 43 175 nSec
44 <= Mi <= 50 200 nSec
51 <= Mi <= 56 225 nSec
57 <= Mi <= 62 250 nSec
63 <= Mi <= 68 275 nSec
69 <= Mi <= 75 300 nSec
76 <= Mi <= 81 325 nSec
82 <= Mi <= 87 350 nSec
88 <= Mi <= 93 375 nSec
94 <= Mi <= 100 400 nSec
101 <= Mi <= 106 425 nSec
107 <= Mi <= 112 450 nSec
113 <= Mi <= 118 475 nSec
119 <= Mi <= 255 Send Message Reject(Async mode)
Figure 125. Target Response to Initiator's Transfer Period
Target
Transfer
Period
100 nSec
125 nSec
150 nSec
175 nSec
200 nSec
225 nSec
250 nSec
275 nSec
300 nSec
325 nSec
350 nSec
375 nSec
400 nSec
425 nSec
450 nSec
475 nSec
(Asynchronous mode)
Maximum
Burst
Rate
10.00 MT/s
8.00 MT/s
6.67 MT/s
5.71 MT/s
5.00 MT/s
4.44 MT/s
4.00 MT/s
3.64 MT/s
3.33 MT/s
3.08 MT/s
2.86 MT/s
2.67 MT/s
2.50 MT/s
2.35 MT/s
2.22 MT/s
2.11 MT/s
N/A
Maximum
Burst
Rate
N/A
10.00 MT/s
8.00 MT/s
6.67 MT/s
5.71 MT/s
5.00 MT/s
4.44 MT/s
4.00 MT/s
3.64 MT/s
3.33 MT/s
3.08 MT/s
2.86 MT/s
2.67 MT/s
2.50 MT/s
2.35 MT/s
2.22 MT/s
2.11 MT/s
N/A
SCSI MESSAGE SYSTEM
167