Adaptec 1966600 User Guide - Page 18

Host 1 In CH 3, Disk CH 2, and, Controller 1; Serial B port is for Controller 2.

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DuraStor 6220SS/7220SS Installation and User's Guide Additionally, two 68-pin very-high-density SCSI connectors connect to the disk channels of the DuraStor 312R storage enclosure. From left to right: s Disk CH 2 s Disk CH 1 The connector labeled Host In (CH 3) can also be used as a disk channel under some configurations. See Appendix A, Port Information for connector pin-out detail. Two RS-232 serial ports each connect a controller to a VT-100 terminal, and are used when you want to access Disk Array Administrator management software. Serial A port is for Controller 1; Serial B port is for Controller 2. Note: Host 1 In (CH 3), Host 2 In (CH 0), Disk CH 2, and Disk CH 1 ports require external termination when they are unused in any dual-controller (active-active or activepassive) configuration. The single-controller (stand-alone) configuration requires no external terminators. Host 1 Out and Host 2 Out have automatic internal termination when they are unused. The switch in the lower right corner of the panel sets the keyboard/keypad input control to either INT (internal, via the OCP) or EXT (external, via the VT-100 keyboard or a computer running Hyper Terminal). Setting the switch to EXT disables the OCP buttons. Note: The front bezel LEDs will work whether the OCP is being used or not. Setting this switch to EXT will not disable the front bezel LEDs. Table 2-1 summarizes the specific technical specifications of the DuraStor SCSI RAID appliance. 2-8

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2-8
DuraStor 6220SS/7220SS Installation and User’s Guide
Additionally, two 68-pin very-high-density SCSI connectors
connect to the disk channels of the DuraStor 312R storage
enclosure. From left to right:
■
Disk CH 2
■
Disk CH 1
The connector labeled Host In (CH 3) can also be used as a disk
channel under some configurations. See
Appendix A,
Port
Information
for connector pin-out detail.
Two RS-232 serial ports each connect a controller to a VT-100
terminal, and are used when you want to access Disk Array
Administrator management software. Serial A port is for
Controller 1; Serial B port is for Controller 2.
Note:
Host 1 In (CH 3), Host 2 In (CH 0), Disk CH 2, and
Disk CH 1 ports require external termination when they
are unused in any dual-controller (active-active or active-
passive) configuration. The single-controller (stand-alone)
configuration requires no external terminators.
Host 1 Out and Host 2 Out have automatic internal
termination when they are unused.
The switch in the lower right corner of the panel sets the
keyboard/keypad input control to either
INT
(internal, via the
OCP) or
EXT
(external, via the VT-100 keyboard or a computer
running Hyper Terminal). Setting the switch to
EXT
disables the
OCP buttons.
Note:
The front bezel LEDs will work whether the OCP is
being used or not. Setting this switch to
EXT
will not disable
the front bezel LEDs.
Table 2-1
summarizes the specific technical specifications of the
DuraStor SCSI RAID appliance.