EC2 Warning Signal Diagnostic Troubleshooter (Part 5)
Use the interactive troubleshooter below to identify your EC2 warning signal, review the verbatim warning, understand the target service, and note the consequence of ignoring.
🚨 Step 1: What specific error symptom are you experiencing?
Please click the most accurate description:
Quick Reference Table
| # | Signal Type | Verbatim Warning | Target | Consequence of Ignoring |
|---|---|---|---|---|
| 1 | prohibition | "Standard file systems, such as XFS and EXT4, are not designed to be accessed simultaneously by multiple servers, such as EC2 instances. Using Multi-Attach with a standard file system can result in data corruption or loss, so this is not safe for production workloads." | Amazon EBS Multi-Attach | Data corruption or loss |
| 2 | prohibition | "Warning Do not use FileVault. If data-at-rest and data-in-transit is required, use EBS encryption to avoid boot issues and performance impact. Enabling FileVault will result in the host failing to boot due to the partitions being locked." | EC2 Mac Instances / macOS AMIs | The host failing to boot due to the partitions being locked |
| 3 | known issue | "NCCL_PROTO=simple—instructs NCCL to use a simple protocol for communication. Currently, the EFA provider does not support LL protocols. Enabling them could lead to data corruption." | Elastic Fabric Adapter (EFA) / NCCL | Could lead to data corruption |
| 4 | prohibition | "Important Using DKMS voids the support agreement for your subscription. It should not be used for production deployments." | Elastic Network Adapter (ENA) module on Ubuntu | Voids the support agreement for your subscription |