Chapter 4: Subsystem Connection and Operation
Channel Settings
Host
CH0 and CH1
Drive
Via system bus, through the backplane
4
th
DIP Switch
Hub enabled
Configuration Information
RAID Controllers
2
Host Servers
1
Data path Connection
Dual data paths
Host Channel Bandwidth
400 MBps
Max. Number of Drives
24
•
This is a direct-attached configuration showing one (1) host connected to
one (1) RAID subsystem. Drives in the enclosure can be configured into
one or more arrays, and made available through individual host ports.
•
Operating system(s) might boot from the array. Operating using a
protected capacity decreases the chance of server downtime. The logical
arrays can be associated with different host IDs on separate host
channels so that if one cable link fails, the host can still access the
arrays through another channel link. File locking or access management
utilities will be necessary to avoid access conflicts.
•
Depending on I/O characteristics, each configured array should be
properly optimized either for Random or Sequential I/Os.
•
Multiple logical drives or multiple partitions can be created and made
available separately through different ID/LUNs on the host ports.
4.4.2 Dual Path Redundant Connection
This is a high availability configuration centered around two (2) clustered
host servers, each with two (2) single-ported HBAs for redundant path
connections.
Host Connection Sample Topologies
4-9
