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Initial Public Release
Cisco has identified an issue which might prevent write operations to the onboard embedded flash devices on Nexus 7000 Supervisor 2 (N7K-SUP2) and Supervisor 2E (N7K-SUP2E) modules that run NX-OS releases from Release 6.1(1) to 6.2(12). The issue is also documented in Cisco bug ID CSCus22805.
This is not a hardware-related issue which can be resolved by a Return Material Authorization (RMA).
Each Nexus 7000 Supervisor 2/2E is equipped with two onboard embedded flash devices in a Redundant Array of Independent Disks (RAID) configuration. After continuous operation, one of the onboard embedded flash devices might experience a transient error which removes that device from the RAID array. However, the system continues to function normally because of the built-in redundancy.
In order to check the current status of all available RAID devices on the system, enter the show system internal file /proc/mdstat command:
switch# show system internal file /proc/mdstat
Personalities : [raid1]
md6 : active raid1 sdc6 sdb6
77888 blocks [2/2] [UU]
md5 : active raid1 sdc5 sdb5
78400 blocks [2/2] [UU]
md4 : active raid1 sdc4 sdb4
39424 blocks [2/2] [UU]
md3 : active raid1 sdc3 sdb3
1802240 blocks [2/2] [UU]
If a standby supervisor is available and online, please attach to it and check the status of RAID devices on it also.
In the previous output there are four partitions, md3 through md6, mounted to store boot images and other persistent configuration data. For each disk partition, a status [2/2] indicates that there are two disks configured and two currently run. [UU] indicates the current status of each disk and identifies the the status as "U"p and running.
Any status other than [2/2] [UU] might indicate a degraded RAID array where the status for any failed disk will be displayed as "_".
For example, the status shown such as "[2/1] [_U]" or "[2/1] [U_]" indicates a degraded RAID array configuration.
It is recommended to recover the offline disks and get them added back into a RAID array as soon as possible. Complete the recovery steps in the "Workaround/Solution" section and refer to recovery tool's release notes for additional details.
Complete these steps:
- Download the latest Nexus 7000 Supervisor 2/2E Flash Recovery Tool Release from CCO.
- Follow the procedure described in the Flash Recovery Tool Readme file in order to determine if your Supervisor 2/2E module has this issue.
- If your Supervisor 2/2E module does not currently have this issue, monitor for potential future occurrence of the issue as advised in the Flash Recovery Tool Readme file.
- If your Supervisor 2/2E module has this issue, save your configuration file to a TFTP server and follow the directions in the Flash Recovery Tool Read-me file in order to resolve the issue.
The fix for this problem will be integrated into Releases 6.2(14) and 7.2.
To follow the bug ID link below and see detailed bug information, you must be
a registered customer and you must be logged in.
|CSCus22805 (registered customers only)
||N7K-SUP2/E: Compact Flash Failure or Unable to Save Configuration
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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