RAM and FLASH Storage Requirements

All Aruba managed devices store critical configuration data on an onboard compact flash memory module. Ensure that there is always free flash space on the managed device. Loading multiple large files such as JPEG images for RF Plan can consume flash space quickly. Following are best practices for memory management:

  • Ensure sufficient RAM and flash space is available in the Controller/MD/BGW before proceeding with the upgrade.
  • Execute the show memory command to identify the available free memory.
  • Execute the show storage command to identify the available flash space.
  •  If the output of the show storage command indicates that there is insufficient flash RAM, free some used memory. Copy any log files, crash data, or flash backups from your gateways to a desired location. Delete the following files from the Controller/MD/BGW to free FLASH storage:
    • Crash data: Execute the tar crash command to compress crash files to a file named crash.tar. Use the procedures described in Backing up Critical Data on page 1 to copy the crash.tar file to an external server. Execute the tar clean crash command to delete the file from the managed device.
    • Flash backups: Use the procedures described in Backing up Critical Data on page 1 to back up the flash directory to a file named flash.tar.gz. Execute the tar clean flash command to delete the file from the managed device.
    • Log files: Execute the tar logs command to compress log files to a file named logs.tar. Use the procedures described in Backing up Critical Data on page 1 to copy the logs.tar file to an external server. Execute the tar clean logs command to delete the file from the managed device
  • The show commands are available under Analyze > Tool > Commands section of Aruba Central.

If available RAM is not sufficient to meet the requirements stated in the appropriate release notes, it may be necessary to reboot the device and then immediately upgrade, or disable some functionality. The user should consult HPE/Aruba technical support for guidance.

 

In certain situations, a reboot or a shutdown could cause the managed device to lose the information stored in its flash memory. To avoid such issues, it is recommended that you execute the halt command before power cycling.

Deleting a File

You can delete a file using the WebUI or CLI.

In the WebUI

From the Mobility Master, navigate to Diagnostic > Technical Support > Delete Files and remove any aging log files or redundant backups.

In the CLI

(host) #delete filename <filename>