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

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B-6 SANnet II 200 SCSI Array Installation, Operation, and Service Manual • June 2005
Figure B-3 Split-Bus Single-Initiator JBOD Configuration
Split-bus, single-initiator mode: physical drive IDs are 8 to 13 on each channel. In the
following table, A and B indicate the two host channels. The table shows the IDs
assigned to each channel in the split-bus configuration.
Note –
If you want to have IDs of 0 to 5 and plan to add host connections to the upper
two ports later, you can put external terminators into the upper two ports and preserve
the IDs 0 to 5 for the life of the JBOD. For more information, refer to the
SANnet II
Family FRU Installation Guide .
B.5.1 Connecting a Split-Bus JBOD to One Host
To connect a split-bus JBOD, perform the following steps.
1. Stop any I/O on the host bus that will have a cable installed on the bus.
2. Connect each JBOD port to a host.
Caution –
The lower input ports of the JBOD must have a host connection or external
terminator to maintain SCSI bus integrity.
Caution –
Before you disconnect a cable from the array, the host bus on that cable
must be inactive.
Table B-3 Physical Drive IDs for a Split-Bus JBOD in Single-Initiator Mode
Channel A ID 8 Channel A ID 11 Channel B ID 8 Channel B ID 11
Channel A ID 9 Channel A ID 12 Channel B ID 9 Channel B ID 12
Channel A ID 10 Channel A ID 13 Channel B ID 10 Channel B ID 13
Host
Connections
Host
Auto-terminated upper
each bus)
For IDs 0-5 on each bus,
use external terminators
in empty ports
ports (IDs 8 to 13 on