Cisco Cisco ACE Application Control Engine Module Troubleshooting Guide

Contributed by Neil Armstrong and Cong Li, Cisco TAC Engineers.
Feb 04, 2014

This document describes a problem that occurs when you use the CLI for an Application Control Engine
(ACE) 4710 appliance, ACE20, or ACE30 module, and you receive this error message: "write error: No space
left on device."

When you use the CLI for an ACE4710 appliance, an ACE20, or an ACE30 module, an error message, "write
error: No space left on device," displays on the screen in one of these three formats:

"No Space left on device" error

# dir disk0:

  332286 Dec 20 2012 03:56:07 messages

grep: write error: No space left on device

           Usage for disk0: filesystem 

                −4611765850192518655 bytes total used

                −599397581558080000 bytes free

                −5211163431750598655 bytes total

# show tech cp: writing `/isan/vegas/logs/tech_details.11337': 

cat: write error: No space left on device

who: write error: No space left on device

In some situations, the previous symptom might also be accompanied by these errors that are triggered after a
Fault Tolerance (FT) auto−sync:

NOTE: Configuration mode is enabled on all sessions

`no interface gigabitEthernet 1/4`

*** Context 0: cmd exec error ***

`no interface gigabitEthernet 1/3`

*** Context 0: cmd exec error ***

`no interface gigabitEthernet 1/2`

*** Context 0: cmd exec error ***

`no interface gigabitEthernet 1/1`

*** Context 0: cmd exec error **

The sync failure happens because the /isan internal filesystem is full. This problem might also result in some
configuration loss in the standby ACE.