On 22nd January 2021, we announced that due to an intermittent connection issue between the ADS and the MARS tape archive where "slow-access" EAC4 data is stored resulted in many requests to fail.
We are pleased to inform our users that the connection issue has been fixed and access to the full EAC4 data has been restored.
Apologies for the inconvenience this issue may have caused.
Copernicus Helpdesk at ECMWF