About This Guide
The Snap Disk™ 30SA storage subsystem is a 3U expansion array with sixteen Serial ATA disk drives and two
bre channel (FC) connectors. A Snap Disk 30SA’s capacity is only available through the head Snap Server®
(packaged and shipped seperately) to which it is connected; no direct network cabling is possible. Use this guide
in conjunction with the guide that accompanied your head Snap Server to set up your storage system.
Overview
Every Snap Disk 30SA ships with a 3 meter optical FC cable, a 1meter copper FC cable, and one optical FC
loopback terminator. Multiple Snap Disk 30SAs can be connected to a Snap Server in a single loop conguration.
Connections The Snap Disk 30SA controller module has an optical FC connector (OPTICAL), a copper FC
connector (COPPER), an internal terminator (TERM) switch, and a Fault light. Expansion arrays are daisy chained
using the provided cables, alternating between the optical and the copper cables (see illustration opposite).
Termination To close the loop, the nal Snap Disk 30SA in your installation must be properly terminated.
Termination is achieved in the nal expansion array either by setting the TERM switch in the ON position or by
connecting the optical bre channel loopback terminator.
Addressing When connecting multiple Snap Disk 30SAs, each array must be uniquely identied to the FC-HBA
card. Enclosure IDs are set by rotating the ID wheel on the FC Address module. The wheel is incremented by using
a small pointed object to press the button on the top or bottom of the wheel.
Rack Installation
Each Snap Disk 30SA ships with two adjustable (left and right) rack mount shelves and a packet of screws for
attaching the server to a four-post rack. Each shelf consists of two rails, one containing the shelf itself and the
other serving as a support. To safely install the server, you will also need a Phillips screwdriver, a nut driver, and
an assistant to help in installing the expansion array into the rack.
Tip When daisy chaining multiple Snap Disk 30SAs to a Snap Server, the units must be mounted on the same
rack due to the length restriction of the bre channel cables.
1 Adjust the length of the shelf and support rails to roughly the proper length for the rack into which you are
mounting the Snap Disk 30SA.
2 Use up to three screws per side to loosly attach the shelf to
the extender.
3 Using the four screws provided, securely
attach the ends of the shelf assemblies to the
rack posts as shown, and then tighten the
screws securing the two arms of the shelf
assembly together.
4 With help from an assistant, slide the Snap Disk
30SA onto the shelves and attach the four mounting
screws to the rack posts through the holes in the anges.
Apply the plastic covers to the screw holes.
5 Repeat this procedure for any additional Snap Disk 30SAs to be installed.
