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Cisco CSS 11000 Series Content Services Switches

Field Notice: CSS 11000 Flash Disks Subject to Reduced Mean Time Between Failure


Updated March 5, 2002

October 5, 2001


Products Affected

Product

Top Assembly

Comments

HW Rev.

Part Number

CSS-11151-FD-AC

800-15221-01, 800-15221-02, 800-15221-03

 

A0, B0, C0

CSS-11152-FD-AC

800-15226-01, 800-15226-01, 800-15226-03

 

A0, B0, C0

CSS-11153-FD-AC

800-15231-01, 800-15231-02, 800-15231-03

 

A0, B0, C0

CSS-11154-FD-AC

800-15236-01, 800-15236-02, 800-15236-03

 

A0, B0, C0

CSS-11155-FD-AC

800-152241-01, 800-152241-02, 800-152241-03

 

A0, B0, C0

CSS8-IDM-MEM-FD

800-15211-01, 800-15211-02

Flash disk component of CSS-11801-FD-AC and CSS-11801-FD-DC

A0, B0

Problem Description

A flash disk manufacturer for some Cisco 11000 Series Content Services Switch (CSS) products has supplied Cisco Systems with flash disks that may be faulty under normal operating conditions. The number of writes to the flash disk may be greatly reduced from that used to calculate the Mean Time Between Failure (MTBF). If a CSS 11000 product with -FD in the part number has experienced problems with its disk, Cisco recommends that the part be replaced.

Background

Some of the CSS 11000 Flash Disk units have experienced failures due to a defective flash disk supplied by the manufacturer. The number of write accesses to the disk becomes dramatically reduced and will cause the MTBF to be reduced. Cisco recommends an upgrade for products listed above in the Products Affected section that have experienced disk problems, such as bad sectors found while running the system's 'check disk' utility.

Problem Symptoms

The CSS 11000 periodically runs a CheckDisk routine to compensate for sectors that fail under normal operation of a flash disk. If the number of failed sectors is significant then the flash disk is defective.

If your CSS 11000 with a flash disk has had issues with the disk during normal operation, reboots, or upgrades, then it is highly likely that the unit will become defective over time.

A CSS 11000 with a defective flash will either boot into OffDM because it cannot see the disk at all or display the following information on boot or in OffDM.

CS-800 SCM Offline Diagnostic Monitor menu, Version: 4.01 Build 32

     D I S K   O P T I O N S

     Enter the number of a menu selection:

     1.      Format Disk
     2.      Check Disk
     3.      Check Disk Disable
     r.      Return to previous menu

     > 2

     Correct errors if discovered (yes,no): yes
     Quick check disk? (yes,no): no

     CheckDisk(\)ERROR in piDrv(): Invalid drive configuration read from disk! <-- This message occurs on Boot

     WARNING: IDE Disk 0 PIO Mode initialization piDrv() failed!
     WARNING: PiFsInit() could not create Block device for IDE disk!
     Complete(\) Error Initializing HDD
     Press  to continue...

Workaround/Solution

Replace the defective hardware.

As of approximately July 24th, 2001, the flash disk units shown above in the Products Affected section that were manufactured under the deviation D016144 and are guaranteed to be free of this problem. Refer to the section entitled How to Identify Hardware Levels for instructions on how to view the deviation on an in-service product. Products shipped from Logistics as of October 9th, 2001 will not exhibit this problem.

As of approximately September 13th, 2001, the flash disk units shown above in the Products Affected section that were manufactured under the engineering change order (ECO) E024100 are also guaranteed to be free of this problem. Refer to the section entitled How to Identify Hardware Levels below for instructions on how to view the version on an in-service product. Products shipped from Logistics as of October 9th, 2001 will not exhibit this problem.

Customers wishing to replace this part should use the existing return materials authorization (RMA) process. Coding for Service RMAs should be ARFN (Administrative Request - Field Notice).

How To Identify Hardware Levels

fn15068_gj7kmd.gif

All units shipped beginning on July 24, 2001, have been assembled and tested with a flash disk unit which has been screened and is known to be good. To verify that your unit is guaranteed to have the new flash drive, one of the following criteria must be met:

  1. Deviation Sticker "D016144" placed as shown above

    << OR >>

  2. Product Number with minimum revision as follows (see above):

    Product Number Revision

    CSS-11151-FD-AC D0

    CSS-11152-FD-AC D0

    CSS-11152-FD-DC C0

    CSS-11153-FD-AC D0

    CSS-11154-FD-AC D0

    CSS-11155-FD-AC D0

    CSS-11155-FD-DC C0

    Product numbers with revisions prior to those listed above are not guaranteed to be assembled with the new screened flash disk modules.

    Note: Numeric revisions such 00 or 03 are considered previous to an alphanumeric revision.

CSS8-IDM Flash Disk Product Labeling:

fn15068_gj7l50.gif

All units shipped beginning on July 24, 2001, have been assembled and tested with a screened, known good flash disk unit. To verify that your unit is guaranteed to have the new flash drive, one of the following criteria must be met:

  1. Deviation Sticker "D016144" placed as shown above.

  2. Product Number Number with minimum revision of CSS8-IDM-MEM-FD C0.

Product Numbers with revisions prior to that listed above, are not guaranteed to have been assembled with the new screened flash disk modules.

Note: Numeric revisions, such as 00 or 03, are considered previous to an alphanumeric revision.

fn15068_gj7l6p.gif

Note: Some CSS8-IDM-FDs were labeled incorrectly so the revision is prior to C0, but do have the new screened flash disk modules. If you receive a flash disk module with a revision prior to C0, slide the flash disk out of the socket to the edge of the front plate (you do not need to completely remove it), turn the IDM over and view the label. The screened flash disks have a date code and the new part number SDP3B-350-584 as shown on the label below.

fn15068_gsgofv.jpg

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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