User`s guide

16 007-4522-003
1: Storage System Overview
Figure 1-10 Single-port RAID LRC I/O Module
The RAID LRC I/O modules can address up to 64 disk drives. A maximum of two fully
populated JBOD expansion enclosure can be cabled to a RAID base enclosure. The disk
drives in each enclosure can be of different capacities, but all of the disk drives in an
individual LUN must be of the same capacity.
For information about the LEDs on the rear of the RAID LRC I/O modules, see “RAID
LRC I/O Module LEDs” in Chapter 5.
RAID Loopback LRC I/O Modules
A RAID loopback LRC I/O module may be installed in slot B to create an simplex RAID
configuration. The loopback LRC I/O modules do not contain the FFX-2 circuitry and
connect RAID LRC I/O module A to the B-side of the disk drives. These modules are
sometimes referred to as a RAID wrap LRC I/O modules. There are two version of the
the RAID loopback LRC I/O module available: a single-port version and a dual-port
version. (See Figure 1-11 and Figure 1-12).
Expansion
RS 232
2 Gb
Host 0
Fault