C141-E103-01EN
5 - 9
Table 5.5
Setting of the SCSI interface operation mode (CN2)
Operation mode
CN2 15-16
Follows the DIFFSNS signal level on the SCSI bus
Open *
Single-Ended mode
Short
* Set at factory shipment
(5)
Setting the bus width of the SCSI interface
By establishing a short-circuit between the 13 and 14 CN2 setting terminals, the bus width for the
SCSI interface is forcibly set to the 8-bit bus mode. This setup terminal must be set in order to
guarantee the physical level of the SCSI interface’s upper bus (DB8-15, P1) inside the IDD only
when the top-level bus (DB8-15, P1) for the IDD SCSI interface is not connected to the external
part of the IDD.
Table 5.6
Setting the bus width of the SCSI interface (CN2)
Bus width
CN2 13-14
16 bit bus
Open *
8 bit bus
Short
* Set at factory shipment
5.3.3
Mode settings
In addition to the previously described settings using setting terminals, the IDD is provided with several
mode settings. The mode settings are enabled by specifying the CHANGE DEFINITION command.
Table 5.7 lists the mode settings and their settings at factory shipment.
Refer to Section 3.1.4 of the SCSI Logical Interface Specifications for details of the command.
Table 5.7
Default mode settings (by CHANGE DEFINITION command)
Mode setting
Contents
SCSI level
SCSI-2
SYNCHRONOUS DATA TRANSFER REQUEST message sending
Sent from IDD
UNIT ATTENTION report mode
Reported
Reselection retry count
Not restricted
WIDE DATA TRANSFER REQUEST message sending
Sent from IDD
Reselection time-out delay
250 ms
Spindle motor start delay time
0 sec (MP)
12 sec × SCSI ID (MC)
Содержание MAH3091MC - Enterprise 9.1 GB Hard Drive
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Страница 85: ...C141 E103 01EN 5 4 3 Connecting more than one IDD multi host Figure 5 1 SCSI bus connections 2 of 2 ...
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Страница 145: ...C141 E103 01EN B 1 APPENDIX B SETTING TERMINALS B 1 Setting Terminals This appendix describes setting terminals ...
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