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 | Publish Date | Comments |
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1.0
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03-Nov-15
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Initial Release
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10.0
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11-Oct-17
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Migration to new field notice system
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10.1
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24-Jan-19
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Corrected Formatting Issues
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Affected Product ID | Comments |
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BE6H-M4-K9=
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BE6H-M4-XU=
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BE6M-M4-K9=
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BE6M-M4-XU=
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BE7H-M4-K9
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BE7H-M4-XU
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BE7M-M4-K9
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BE7M-M4-XU
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Defect ID | Headline |
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CSCuv33991 | BE6000 series and BE7000 series - severe performance issues |
Due to an incorrect factory script instruction on units shipped between January 1, 2015 and July 29, 2015, the RAID controller configuration settings were not set correctly on these appliances:
Note: These appliances are NOT affected by this Field Notice:
Appliances based on the Cisco Unified Computing System C-Series M4 (UCS C-Series M4) use a different RAID controller model than previous hardware generations, which require a different CLI syntax for the configuration settings. Cisco has determined that the correct settings were not properly translated into the factory automation scripts for UCS C-Series M4 hardware setup for affected BE6000 and BE7000 series appliances models.
Appliances with incorrect RAID settings might experience slow read and write IO performance to local storage. The results of the performance impact might be seen in Cisco Unified Communications Manager under these conditions:
The correct settings are: Read Policy = Read Ahead Always Write Policy = Write Back with BBU Strip Size = 128KB An appliance with settings different from those shown might need to have those settings changed. Cisco recommends all deployments change the Read Ahead Policy and Write Cache Policy settings via Cisco Integrated Management Controller (CIMC), which requires a few minutes to make the changes on a live server and will take effect immediately after you make the change. Servers with older firmware levels will require a graceful shutdown and reboot to make the changes. For the procedure, see Option A in the "Solution" section. As most customers are not at the threshold of performance limits, Option A is expected to resolve issues for the majority of customers. These settings optimize storage performance, but otherwise do not impact server hardware configuration, installed Cisco Collaboration applications, or virtual machine configurations. Cisco only recommends that you change the Strip Size for deployments that continue to experience issues after Option A has been implemented. A change to the Strip Size requires a rebuild of the RAID logical volume and restore of the applications. For the procedure, see Option B in the "Solution" section.
Solution
Option A - for all deployments, complete these steps: (NOTE THAT ALL PROCEDURES MUST BE PERFORMED DURING A MAINTENANCE WINDOW)
Option B - only for deployments that continue to experience issues after you complete Option A, complete these steps: (NOTE THAT ALL PROCEDURES MUST BE PERFORMED DURING A MAINTENANCE WINDOW)
In Cisco Integrated Management Controller (CIMC), choose Server > Summary. The serial number of the server is listed in the Server Properties pane of the Server Summary window.
Once you have identified the serial number of the server, use the Serial Number Validation Tool in order to determine if your appliance is impacted.
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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