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Cisco Carrier Routing System

Field Notice: FN - 63129 - CRS-1 - Upgrade Failure Due to Insufficient Disk Space for IOS XR 3.7 and Greater - Upgrade Flash Disk to 2GB

Field Notice: FN - 63129 - CRS-1 - Upgrade Failure Due to Insufficient Disk Space for IOS XR 3.7 and Greater - Upgrade Flash Disk to 2GB

July 3, 2008


NOTICE:

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.

Revision History

Revision Date Comment
1.0
03-JUL-2008
Initial Public Release

Products Affected

Products Affected Top Assembly Printed Circuit Assembly Hardware Revision
Part Number Revision Part Number Revision
CRS-DRP-B-PLIM
800-28667-01
B0
73-11043-01
B0
D0
CRS-FLASH-DISK-1G
800-28893-01
A0
n/a
n/a
A0
CRS-FLASH-DISK-2G
800-31156-01
A0
n/a
n/a
A0
CRS-16-RP
800-19834-21
E0
73-7641-12
G0
N0
CRS-16-RP-B
800-27098-08
B0
73-10322-03
L0
H0
CRS-FCC-SC-22GE
800-27703-03
B0
73-10472-02
B0
C0
CRS-8-RP
800-22921-17
E0
73-8564-16
E0
K0

Problem Description

The space required to store IOS XR software on the flash disk continues to increase with availability of new feature rich releases. Due to the increase in the IOS XR software image size, users may have insufficient disk space to store current XR software versions and new versions intended to upgrade. Inadequate free disk space can cause upgrade failures.

Background

As of approximately May 20th 2008, flash disks manufactured under Engineering Change Order E093013 have increased in memory size to meet the demands of new features.

IOS XR software images continue to increase as features are implemented in each release. As such, users may not have enough disk space to store current, new, and backup versions of XR software on the flash disk. In addition, new features such as Disk Mirroring and Disk Partitioning will reduce the amount of disk space that is available to store the operating sytem software. From release 3.7 onwards, a minimum of a 2GB flash disk will be required.

A minimum of a 2GB flash disk will need to be inserted while running the current version (pre-3.7) of IOS XR software so that there is sufficient disk space to install release 3.7 or later.

Note: The flash disks on Active and Standby RPs, DRPs and Shelf-Controllers all need to be changed. If using disk mirroring, disks in slot 0 and slot 1 must be of the same size. The Active and Standby RPs, DRPs, and FCC-SC-22GE shall use the same size of flash disks in normal operation.

Problem Symptoms

If you continue to copy large files to flash, eventually you will see HA_WD-4-DISK_ALARM messages. In addition, the install add operation will fail when the disk becomes full. Here is an example of the syslog message that will be observed:

%HA-HA_WD-4-DISK_ALARM : A monitored disk is above 80% utilization. Please remove unwanted user files and configuration roll back points.

Note: This means that 80 percent or more of the disk space has been utilized.

Workaround/Solution

Upgrade Steps:

1. When upgrading to IOS XR 3.7 or greater, you must order a 2GB Flash Disk, CRS-FLASH-DISK-2G=. Please check the flash disk size by using the CLI dir command as described in the How To Identify Hardware Levels section.

2. Upon receipt of the 2GB Flash disk, install the Flash disk into affected hardware modules by following the instructions found at Flash Disk Upgrade Tasks and RECOMMENDED PROCEDURE FOR REPLACING THE PCMCIA CARD ON THE CISCO CRS-1 Carrier Routing System LINE CARD CHASSIS.

3. After the Flash Disk is upgraded to 2GB on the affected hardware modules listed, follow the software upgrade procedure in the IOS XR 3.7 release note to upgrade to IOX 3.7.0 when it is available to the public on July 25, 2008. It is mandatory for the active RP and standby RP to have the same software and hardware. Users may choose to gracefully upgrade the flash disk without upgrading the IOX software in order for it to be done at later time.

Note: RMA Process Change:

Flash disks and hardware modules are now shipped separately.

1. When executing RMAs for the hardware modules, please remove the Flash Disk.

2. When replacing the flash disk, please refer to instructions found here.

3. Customers can RMA the Flash Disk separately if it is defective. The RMA depot will send a direct replacement with a formatted Flash Disk.

How To Identify Hardware Levels

To identify the CRS-FLASH-DISK-800 TAN, you must physically remove the flash disk. Below is an example from a 1GB card:

To view the size of your flash disk, you can physically remove the flash disk or execute the dir command as seen below.

Here's an example from a 1GB card:

CRS#dir disk0: | inc total 1024491520 bytes total (134807552 bytes free)

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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