Daisy Chain Procedures - Rorke Data Galaxy HDX2-2430S-16U4D Installation And Hardware Reference Manual

Galaxy RAID GHDX2-2430S-16U4D Installation and Hardware Reference Manual

3.3.2 Daisy Chain Procedures

Step 1. Connect the RAID subsystem to the host computer. Use the
Step 2. Daisy chain subsystems. If you wish to connect more than one
Step 3. Associate RAID Volumes with host channel ID/LUNs. Each
3-8
This configuration is suitable for applications that require storage
expansion.
Data paths connecting each host computer each has a failsafe
counterpart. In the event of host link or server failure, data access
can be continued through the redundant data path.
It is advised to connect the primary RAID subsystem to the
secondary RAID subsystems using redundant data links.
Different storage volumes are made available on host ports.
Different volumes can be optimized for the I/O characteristics
required by different server applications.
Depending on I/O characteristics, each configured array should be
properly optimized either for Random or Sequential I/Os.
To create dual redundant data paths on the host side, it is necessary
to install third-party failover software on the servers.
Operating system(s) might boot from the array. Operating using a
protected capacity decreases the chance of server downtime. Each
server may use separate capacity volumes or share volumes using
file locking or access management utilities.
You may also partition a logical capacity into two or more volumes
and let each server access separate volumes.
VHDCI-to-VHDCI SCSI cable that was provided in the package.
Attach one end to the host computer and the other end to the SCSI
IN port at the back of the RAID subsystem.
subsystem, the extra VHDCI-to-VHDCI SCSI cable must be
separately purchased and installed. Attach one end of the cable to
the SCSI OUT port and the other end to the SCSI IN port in the
next subsystem.
configured RAID volumes (logical drive/logical volume/logical
partition) must be associated with a unique channel ID/LUN. For
example, if a RAID volume in the Primary subsystem is associated
with ID0, the RAID volumes in other cascaded enclosures should be
associated with ID/LUNs other than ID0 LUN0. The system default
for each subsystem is ID0. You will need to create more host
channel IDs on secondary/cascaded subsystems.
The available IDs for a SCSI bus range from 0 to 15, and the HBA
card may occupy ID7. Please refer to the documentation that came
with your HBA cards for the SCSI IDs assigned to them. Normally
Daisy Chain