Table of Contents
Advertisement
RAID Subsystem DVA-16K | Installation Manual
5.2
Host Connection Topology
There is no direct association between host ports and drive channels. Drives are associated
with host port IDs as the logical configuration of drives, e.g., a logical drive. A logical drive can
be composed of drives on different drive channels, and a logical drive can be associated with
target IDs on different host ports.
Drive access contention (that may happen when two (2) host computers can access the same
array) and data-path failover activities should be handled by a third-party software running on
host computer(s).
RAID subsystem host channel SCSI connectors are connected to the servers via host bus
adapters (HBAs) that have been installed on the host computer(s).
•
•
5.2.1
Single Host
In the example shown in Figure 5.2, one of the SCSI ports on the controller rear panel is con-
nected to a single host computer.
Servers
Subsystem
RAID Controllers
RAID Level
Disk Configuration
Drives
Host Bus Adapters
Data Path Connection
Table 5.1 Configuration Overview for Single Server Connection
Fig. 5.2 Single Host Connection
Bosch Security System
Single server connection: If a single logical drive is mapped to a single server, a RAID
management software should be installed in the server to execute RAID functionality.
Multiple server connection: If a single logical drive is mapped to two (2) separate servers
through dual-redundant data paths, separately purchased, third-party multipathing and
clustering software must be installed on both servers. The clustering software will ensure
that if one (1) server or the data path to a single server fails, the second server will con-
tinue to provide access to the data.
Subsystem Connection and Operation | en
Single Server
One (1)
One (1) subsystem
One (1)
RAID 5
One (1) or more logical drives
Sixteen (16) drive channels
One (1) single-port SCSI
Dual-redundant data paths
35
F.01U.027.799 | V2 | 2008.08
Advertisement
Table of Contents
