Wide Data Transfer Request (01, 02, 03H); Table 172. Target Response To Initiator's Transfer Period (Se Mode) - Hitachi HUS151473VL3800 - Ultrastar 73.4 GB Hard Drive Specifications

SE Mode
Table 172: Target response to Initiator's transfer period (SE mode)
Initiator's request
0 <= Mi <= 11
12 <= Mi <= 12
13 <= Mi <= 18
19 <= Mi <= 25
26 <= Mi <= 31
32 <= Mi <= 37
38 <= Mi <= 43
44 <= Mi <= 50
51 <= Mi <= 56
57 <= Mi <= 62
63 <= Mi <= 68
69 <= Mi <= 75
76 <= Mi <= 81
82 <= Mi <= 87
88 <= Mi <= 93
94 <= Mi <= 100
101 <= Mi <= 106
107 <= Mi <= 255

19.1.3 Wide Data Transfer Request (01, 02, 03h)

An Initiator and a Target exchange a pair of Wide Data Transfer Request messages to establish a data transfer width agreement
between the two devices. The Initiator may initiate a wide data transfer negotiation at any time after the LUN has been identi-
fied. The Target initiates a wide data transfer negotiation if the Target has not negotiated with the Initiator since the last time
the Target was Reset (Power-on Reset, SCSI Bus Hard Reset, or Target Reset message).
Target initiated negotiation occurs either immediately following the Command phase or immediately following the first recon-
nection. In either case negotiation occurs before any Data phase between the Target and the Initiator. The Target will negotiate
the data transfer width agreement prior to negotiating the synchronous data transfer agreement. If a synchronous data transfer
agreement is in effect when a Wide Data Transfer Request message is received, the Target will reset the synchronous agree-
ment to asynchronous mode.
The implied data transfer width agreement remains in effect until the Target is Reset (Power-on Reset, SCSI Bus Hard Reset,
or Target Reset message) or a new data transfer width agreement is negotiated. If a Reset occurs, the Target goes to eight bit
mode.
Target transfer
period (ns)
M+=12 to negotiate
50.00
75.00
100.00
125.00
150.00
175.00
200.00
225.00
250.00
275.00
300.00
325.00
350.00
375.00
400.00
425.00
Send Message Reject
(Asynch mode)
Hitachi Ultrastar 15K147 SCSI Hard Disk Drive Specification
215
Maximum burst
rate (MT/s)
N/A
20.00
13.33
10.00
8.00
6.67
5.71
5.00
4.44
4.00
3.64
3.33
3.08
2.86
2.67
2.50
2.35
N/A