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|Affected OS Type
||Affected Release Number
7.0(3)I5(1), 7.0(3)I4(6), 7.0(3)I4(4), 7.0(3)I4(7), 7.0(3)I4(2), 7.0(3)I6(2), 7.0(3)I4(1), 7.0(3)I5(2), 7.0(3)I4(3), 7.0(3)I7(2), 7.0(3)I4(5), 7.0(3)I6(1)
Affected releases - Any release earlier than 7.0(3)I7(3) and 7.0(3)I4(8)
This eUSB failure, CSCvg79938 is resolved in 7.0(3)I7(3) or 7.0(3)I4(8) and later.
||N3k: eUSB Flash Failure or Unable to Save Configuration and Bootflash becomes read-only
An issue has been discovered on Cisco Nexus 3000 Series switches that use 2Gb or 4Gb boot flash (products listed in Table 1) which might prevent a successful save of the configuration, write or creation of of a new VLAN to flash, or boot up of the switch when reloaded. The scope of impact is for platforms listed in Table 1 and for a limited set of serial numbers. Check the Serial Number Validation Tool in order to see if your switch is impacted.
Refer to Cisco bug ID CSCvg79938 for further details.
Table 1 lists the Product IDs (PIDs) of the impacted platforms.
Table 1. Impacted PIDs
Any releases earlier than 7.0(3)I7(3) and 7.0(3)I4(8) are impacted. This includes Release 7.0(3)I5(1), 7.0(3)I5(2), 7.0(3)I6(1), 7.0(3)I6(2), 7.0(3)I7(1), 7.0(3)I7(2), 7.0(3)I4(7) and earlier.
Some Cisco Nexus 3000 Series platforms that use 2Gb or 4Gb boot flash and fall within the impacted serial range might see an eUSB flash failure. The boot flash can either go into a read-only mode sometimes recovered post reload or become completely inaccessible.
This eUSB failure, Cisco bug ID CSCvg79938, is resolved in Release 7.0(3)I7(3) or 7.0(3)I4(8) and later.
Note: Release 7.0(3)I5(1) and 7.0(3)I5(2) as well as 7.0(3)I6(1) and 7.0(3)I6(2) do NOT have the fix for Cisco bug ID CSCvg79938.
Your switches are impacted if:
- The switch PID is included among the products affected listed in Table 1.
- The switches run an impacted version of NX-OS. For more information, see the “Releases Impacted” section.
- The switch falls in the serial number range as listed in the impacted serial numbers. You can search your device's serial number in the Serial Number Validation Tool in order to make this determination.
- These symptoms are exhibited:
- A reload of the box fails to initialize the image and the user is placed in boot prompt.
- Copy running-configuration startup-configuration fails.
- The creation of new VLANs results in a failure.
- These errors are seen on the switch during normal operation:
%KERN-3-SYSTEM_MSG: [31834373.490858] end_request: critical target error, dev sda, sector 276109 - kernel
%KERN-2-SYSTEM_MSG: [31789906.868100] EXT4-fs (sda3): Remounting filesystem read-only - kernel
%KERN-3-SYSTEM_MSG: [31789906.868104] EXT4-fs (sda3): previous I/O error to superblock detected - kernel
%KERN-3-SYSTEM_MSG: [31789906.868979] end_request: critical target error, dev sda, sector 737856 - kernel
%DEVICE_TEST-2-COMPACT_FLASH_FAIL: Module 1 has failed test BootFlash 5 times on device BootFlash due to
%DAEMON-3-SYSTEM_MSG: frequency file /mnt/pss/ntp.drift.TEMP: Read-only file system - ntpd -> Applications
when trying to read data will get RO error
Upgrade impacted switches to Release 7.0(3) I7(3) or 7.0(3) I4(8).
The switch can be upgraded to one of these releases as per normal procedure via an install all or boot variable change and reload.
For detailed upgrade instructions, refer to the upgrade guide for your release. This can be found at Software Upgrade and Downgrade Guides.
The boot flash can either go into a read only mode (recoverable by reload) or become completely inaccessible. If the switch becomes inacessable open a Technical Assistance Center (TAC) case for a Return Material Authorization (RMA) and reference the field notice number.
Note: Cisco bug ID CSCvg79938 is resolved in Release 7.0(3)I7(3) or 7.0(3)I4(8) and later.
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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