StorCase Technology DS500 - Manual (Page 32)

28 Appendix A RemotaSilo Configurations
Kingston Technology Company RemotaSilo User’s Guide - Rev. B00
c. Only one of the RemotaSilo chassis connected in a cluster has
a RAID controller (or more than one) installed. This chassis is
designated as the RemotaSilo RAID chassis.
d. All disk drives installed in the RemotaSilo RAID chassis, as
well as those installed in the other chassis are connected to
the RAID controller(s) via SCSI cables. All of these drives are
controlled by the RAID controller associated with the cluster.
In large mass storage systems, more than thirty SCSI devices may be
connected to a RAID controller and these drives may be housed in
multiple RemotaSilo chassis. Since each RemotaSilo chassis is
equipped with an Ethernet port, either a thin Ethernet coaxial cable or a
twisted pair Ethernet cable can be used to connect multiple RemotaSilo
chassis together as a cluster.
Note: The distance between two adjacent RemotaSilo chassis is
limited by the maximum SCSI cable lengths between them, not by
the Ethernet cable length. In general, an Ethernet cable can extend
further than a SCSI cable, even in the case where a differential
SCSI cable is used.
The RemotaSilo chassis which is connected to the host computer via an
asynchronous serial cable (a SCSI port is also available) will be referred
to as the “Master”, and the rest of the RemotaSilo chassis that are
connected to the Master via the Ethernet connection will be referred to
as “Slave” RemotaSilo chassis. Up to 15 Slave RemotaSilo chassis
may be connected to the Master chassis; up to 16 RemotaSilo chassis
can be monitored and controlled by the host computer. This capability is
useful when a single host computer is required to supervise all
RemotaSilo chassis in a cluster configuration.