Recurring disk space issues-i5800

• This is a most common issue in physical platform that working with many modules (LTM,APM,GTM,ASM..). So you can resolve this issue by simple things.
• You can check the free space in device and increase the size of mounts(/var,/shared..). 3.1 GB is usual /var size, and it should increase as per your need.
• Also, you can upgrade the platform to 16.x version (it will automatically increase the size to 50% - to 4.7GB)
• Main reason of increasing /var size is backup files, pcap files. you can setup an external backup storage mechanism (if bigiq there, you can schedule backup to BIG IQ).
• You can configure mount monitoring to get alerts.

 You can go through below link for doing it. Thanks