Hard Disk Reaching Critical Limits
When the hard disk usage is more than 99% then the gateway will enter sleep mode. In this
mode, no new requests will be entertained and the following error banner will be displayed in
the Web UI.

When the gateway is in sleep mode, the API's will receive the following response:
{"response":{"appStatusCode":"GW_507","message":"Gateway is in sleep mode. Disk usage is critically high. Please try after resolving the issue"}}