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Cisco Content Delivery Engine Series

Field Notice: FN - 63438 - CDE front-mounted Generation 2 solid-state drives (SSDs) support added that also addresses an issue with Generation 1 SSDs in CDE220 and CDE250 Flash-based servers. Software driver update required for CDS-TV application.

Field Notice: FN - 63438 - CDE front-mounted Generation 2 solid-state drives (SSDs) support added that also addresses an issue with Generation 1 SSDs in CDE220 and CDE250 Flash-based servers. Software driver update required for CDS-TV application.

November 21, 2011


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
21-NOV-2011
Initial Public Release

Products Affected

Products Affected Comments
CDE - CDE220-K9/ V02 - V07 
CDE220 server with SSDs (CDS TV)
CDE - CDE250-K9/ V01-V02
CDE250 Server with SSDs (CDS TV)

Problem Description

New SSDs
The new front-mounted Gen 2 SSDs, used as storage drives in CDE220-K9 and CDE250-K9 Flash-based servers, require a new driver update for the CDS-TV application. This update ensures the software recognizes the SSD drive with the proper attributes necessary to optimize the intended lifespan of the SSD drive.

Long-term operation of the SSD drive without the driver update (and correct key attributes recognized by the software) can result in accelerated SSD wear-out.

Old SSD Issue
When an abrupt power loss occurs on a Gen 1 SSD while the SSD is under load, which can also happen when the SSD is being written to and a power-off shutdown occurs, the result is that the SSD may become corrupted and unusable.

Background

New SSDs
Gen 1 SSDs are declared end-of-life by the vendor. The replacement SSDs require a driver update in order for these Gen 2 SSDs to be recognized with proper attributes.

Old SSD Issue
When an abrupt power loss occurs on a Gen 1 SSD while the SSD is under load, the SSD may become corrupted and unusable. If an SSD becomes corrupted in this way, it must be replaced.

The driver update provides a fix to prevent the corruption of the SSD when the system is being shutdown. When the system is being shutdown, the driver sends a command to the SSD to stop all activity and therefore is protected from corruption.

The driver update is compatible with both Gen 1 SSDs and Gen 2 SSDs. Therefore, proactive driver update is highly recommended.

Gen 1 and Gen 2 SSDs will coexist in the same CDS system.

The SSD drive recognition problem does not exist on CDS-IS application systems; therefore, an update is not required.

A single driver package addresses current supported releases of CDS-TV.

While the Gen 2 SSDs will operate without the driver update, the CDS-TV application will not operate the SSDs to meet the intended lifespan of the drive.

Cisco requires this driver update be applied to CDS-TV systems whenever the Gen 2 SSD drives are present either on a new system or on a per-drive FRU basis or on a system with Gen 1 SSDs.

CDE models with SSDs for CDS-TV application:

CDE220-2S3-C (CB-32-12F160-3QTX, CDE220-S3-3QTX-K9=, CDE220-64S3-TX-K9=)
CDE220-2S3-F (CB-32-12F160-4DSX,CDE220-S3-4DSX-K9=, CDE220-64S3-SX-K9=)
CDE220-2S1-C (CB-16-4F160-1QTX, CDE220-S1-1QTX-K9=)
CDE220-2S1-F (CB-16-4F160-2DSX, CDE220-S1-2DSX-K9=)
CDE250-2S5 (CB-48-HVY-2WPL + SB-12F160, CDE250-HV-2WPL-K9=)
CDE250-2S6 (CB-48-HVY-2WPL + SB-24F160, CDE250-HV-2WPL-K9=)

Here is a list of releases that require driver updates:

2.1.3 2.1.3-es3 2.1.3-es4 2.1.3-es5 2.1.3-es6      
2.1.4 2.1.4-es1 2.1.4-es2 2.1.4-es3 2.1.4-es4 2.1.4-es5    
2.2.1 2.2.1-es1 2.2.1-es2 2.2.1-es3 2.2.1-es4 2.2.1-es5    
2.3.2 2.3.2-es2 2.3.2-es3 2.3.2-es4 2.3.2-es5 2.3.2-es6    
2.3.3 2.3.3-es1 2.3.3-es3 2.3.3-es5 2.3.3-es6 2.3.3-es7 2.3.3-es8 2.3.3-es9
2.4.2 2.4.2-es1 2.4.2-es2          
2.5.1 2.5.1-es1            

All subsequent releases, both maintenance and ES releases, include the new driver.
CDS-TV 2.5.2 release and later require no driver update.

Problem Symptoms

New SSDs
Front-mounted Gen 2 SSDs used in CDE220 and CDE250 chassis for CDS-TV application will not be recognized with proper attributes. As a result, the CDS-TV application will not apply the appropriate capacity derating used to manage drive endurance.

Old SSD Issue
Potential Gen 1 SSD corruption upon abrupt power loss or power shut down.

Workaround/Solution

The new driver for Gen 2 SSDs also addresses the Gen 1 SSD issue.

New SSDs
At a scheduled maintenance window, install the new device driver for TV CDS software to recognize the drives.

Old SSD Issue
There are two possible workarounds:

  1. Before shutting down a system with external SSDs, ensure that there is no write activity going on to the SSDs. By doing this, the possibility of corruption is minimal.
  2. At a scheduled maintenance window, install the driver.

Scenarios requiring this update are listed below:

  • Existing server with Gen 1 SSDs: Locate the driver update package on Cisco.com (refer to the link below), and save it to the target system drive. Operate the driver update in accordance with the Release Note instructions (refer to link below).
  • New Server from Manufacturing: Identify the new Gen 2 SSD drives being installed. Search for the driver update package, which is already installed on the system drive for new systems. Operate the driver update in accordance with the Release Note instructions (refer to the link below) as a LAST STEP following the successful installation of the CDS-TV application.
  • RMA Server Replacement: Identify the new Gen 2 SSD drives being installed. Locate the driver update package on Cisco.com (refer to the link below), and save it to the RMA server system drive. Operate the driver update in accordance with the Release Note instructions (refer to the link below) as a LAST STEP following the successful installation of the CDS-TV application.
  • RMA SSD Drive FRU Replacement: Identify the new Gen 2 SSD drives being installed. Locate the driver update package on Cisco.com (refer to the link below), and save it to the target system drive. Operate the driver update in accordance with the Release Note instructions (refer to the link below).

Refer to the Release Notes and Driver Download links below for driver installation instructions.

New SSDs:
CSCtr29064 Release Notes
Old SSD Issue:
CSCtt47528 Release Notes


Driver Download links are provided below:

Download Link for 2.1.3 - 2.4.2
Download Link for 2.5.1
Download Link for 2.5.1-ES

Condition Table for SSD Driver Update

Product Information SSD Type Release Action
CDE220-2S1 / CDE220-2S3 / CDE250-2S5 / CDE250-2S6 Gen 2 SSD 2.1.3, 2.1.4, 2.2.1, 2.3.2, 2.3.3, 2.4.2, 2.5.1 Install SSD driver for appropriate release
CDE220-2S1 / CDE220-2S3 / CDE250-2S5 / CDE250-2S6 Gen 1 SSD 2.1.3, 2.1.4, 2.2.1, 2.3.2, 2.3.3, 2.4.2, 2.5.1 Install SSD driver for appropriate release
CDE220-2S1 / CDE220-2S3 / CDE250-2S5 / CDE250-2S6   2.1.5, 2.2.2, 2.3.5, 2.4.3, 2.5.2 or newer No action required

How To Identify Hardware Levels

The hardware information can be verified either by running CLI commands from the command line or by visually inspecting the SSD drive as shown below:

Use the Command Line










Visually Inspect the SSD












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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