Dot Hill Systems SANnet II 200, Installation, Operation And Service Manual

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Chapter 4 Connecting Your SCSI Array 4-11
4.6.1 Default Channel Settings
SANnet II 200 SCSI arrays are preconfigured with the channel settings shown in the
following table. The most common reason to change a host channel to a drive channel
is to attach expansion units to a RAID array.
When configuring an array:
■
Channel 0 must be a drive channel.
■
Channel 1, 2, or 3 can be host or drive channels.
SANnet II 200 SCSI array default channel settings are shown in Table 4-3.
After you cable the array, modify the host or drive channels as needed using the
firmware application. For information about how to change channel settings, refer to
the
SANnet II Family RAID Firmware User’s Guide .
4.7 Connecting Cables for a Single-Bus
Configuration
A single-bus I/O configuration assigns all disk drive IDs in a chassis (RAID or
expansion unit) to one channel. This configuration is convenient administratively if
you want to assign all RAID array drive IDs to channel 0, and assign all expansion unit
drive IDs to channel 2.
1. To configure a RAID array as a single-bus configuration, connect the SCSI jumper
cable between the SCSI ports labeled “CH 0” and “SNGL BUS CONF” as shown in
Figure 4-9. Tighten the cable jack screws with six full clockwise turns to ensure proper
connection and operation.
Table 4-3 SANnet II 200 SCSI Array Default Channel Settings
Channel Default Mode
Primary
Controller ID (PID) Secondary
Controller (SID)
0 Drive Channel 6 7
1 Host Channel 0 NA
2 Drive Channel 6 7
3 Host Channel NA 1
6 RCCOM NA NA