Bosch DVA-16K User Manual

RAID Subsystem DVA-16K | Installation Manual

Subsystem Connection and Operation | en 35 

Bosch Security System

F.01U.027.799 | V2 | 2008.08

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). 

•

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.

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.

Single Host Connection

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

Configuration Overview for Single Server Connection