Dot Hill Systems SANnet II 200, Инструкция по установке, эксплуатации и обслуживанию

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Appendix B Cabling JBODs B-5
Figure B-2 A Single-Bus JBOD with Two Host Connections (Rear View)
The following table shows the default physical drive IDs for a 12-drive JBOD when
you set up a single-bus configuration. The physical drive IDs are 0–13, with IDs 6 and
7 reserved for host HBA connections.
B.5 Cabling a Split-Bus, Single-Initiator JBOD
Configuration
There are two important features to note with the split-bus, single-initiator JBOD
configuration:
■
The lower input ports on the JBOD must be terminated with an HBA host
connection or external terminator. The upper I/O SCSI connectors are auto-
terminated.
■
In a split-bus configuration, the physical drive ID numbers automatically change
according to the cabling.
Single-initiator mode has only one host connection on a SCSI channel.
Figure B-3 shows a split-bus JBOD with two host connections using one host
connection to each channel (single-initiator mode). In this example, the array can be
connected to two hosts or to two ports on one host. For the single host configuration,
this is an efficient way to provide mirroring capability for the single host.
Table B-2 Physical Drive IDs for a JBOD in a Single-Bus Configuration (Front
View)
ID 0 ID 3 ID 8 ID 11
ID 1 ID 4 ID 9 ID 12
ID 2 ID 5 ID 10 ID 13
Host
Connections
Host
Bus cable
Host cable