Cisco Cisco CRS-X Multishelf System Installation Guide

The Cisco CRS-1 Fabric Chassis Integrated Switch Shelf Controller (SC) Card supports 22 Gigabit 
Ethernet (GE) ports for control plane connectivity between line card and fabric card chassis in a 
Cisco CRS-1 multichassis system. The SCGE card controls the shelf management functions for the 
fabric chassis and its components.

The fabric chassis has two SCGE card slots. At least one SCGE card must be operational for the chassis 
to function. A second SCGE card can be installed for redundancy, so that the loss or removal of a single 
shelf controller card does not bring down a chassis.

The SCGE card is available with a 40 GB, 80 GB, or 160 GB SATA hard disk drive. New SCGE cards 
are shipped with the hard disk drive preformatted and partitioned with two QNX4 partitions, and one 
FAT32 partition. Support for the QNX4 file system was introduced in Cisco IOS XR Release 3.8.2. If 
your version of Cisco IOS XR is earlier than Release 3.8.2, you must reformat and partition the hard disk 
drive on the new SCGE card to have three FAT32 partitions.

This document explains how to verify the formatting on a new SCGE card hard disk, and how to correct 
the formatting if necessary. For the majority of customers, the new SCGE card hard disk is shipped with 
the correct formatting and no further action is required. 

 describes the changes to this document.

Support for multiple disk partitions was introduced in Cisco IOS XR Release 3.6. To perform the 
procedure descibed in this document, you must be running Cisco IOS XR Release 3.6 or later.

OL-22932-01

June 2010

Initial draft of this document.