# EFS operations 28 of 31 listed operations are implemented. Back to [EFS](/docs/services/efs/index.md). ## Summary | Category | ✅ Supported | ❌ Unsupported | | --- | --- | --- | | File systems | 5 | | | Mount targets | 5 | | | Access points | 3 | | | Lifecycle | 2 | | | Backup | 2 | | | Policy | 3 | | | Tags | 6 | | | Account | 2 | | | Replication | | 3 | --- ## Endpoints ### File systems | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `CreateFileSystem` | ✅ Supported | Creation-token idempotency, performance/throughput mode validation, One Zone metadata, optional Backup flag and inline tags; lifecycle creating → available | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_CreateFileSystem.html) | | `DescribeFileSystems` | ✅ Supported | Filters by FileSystemId or CreationToken; Marker/MaxItems pagination | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_DescribeFileSystems.html) | | `UpdateFileSystem` | ✅ Supported | Updates ThroughputMode and ProvisionedThroughputInMibps with pairing validation | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_UpdateFileSystem.html) | | `DeleteFileSystem` | ✅ Supported | Rejects deletion while mount targets exist (FileSystemInUse); cascades access points, tags, and policy | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_DeleteFileSystem.html) | | `UpdateFileSystemProtection` | ✅ Supported | Stores ReplicationOverwriteProtection | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_UpdateFileSystemProtection.html) | ### Mount targets | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `CreateMountTarget` | ✅ Supported | Serves a real NFSv4 export with OVERCAST_EFS_NFS=true, metadata only otherwise. One mount target per AZ/subnet enforced; AZ and IP are synthesized deterministically from the subnet ID | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_CreateMountTarget.html) | | `DescribeMountTargets` | ✅ Supported | Lookup by FileSystemId, MountTargetId, or AccessPointId; Marker/MaxItems pagination | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_DescribeMountTargets.html) | | `DeleteMountTarget` | ✅ Supported | Lifecycle deleting → removed | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_DeleteMountTarget.html) | | `DescribeMountTargetSecurityGroups` | ✅ Supported | | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_DescribeMountTargetSecurityGroups.html) | | `ModifyMountTargetSecurityGroups` | ✅ Supported | Enforces the 5-security-group limit; groups are stored, not validated against EC2 | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_ModifyMountTargetSecurityGroups.html) | ### Access points | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `CreateAccessPoint` | ✅ Supported | Client-token idempotency conflict, PosixUser/RootDirectory stored, inline tags; lifecycle creating → available | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_CreateAccessPoint.html) | | `DescribeAccessPoints` | ✅ Supported | Filters by AccessPointId or FileSystemId (mutually exclusive); NextToken/MaxResults pagination | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_DescribeAccessPoints.html) | | `DeleteAccessPoint` | ✅ Supported | | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_DeleteAccessPoint.html) | ### Lifecycle | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `PutLifecycleConfiguration` | ✅ Supported | Validates transition enums and the one-transition-per-policy rule; storage-class transitions are metadata only | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_PutLifecycleConfiguration.html) | | `DescribeLifecycleConfiguration` | ✅ Supported | | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_DescribeLifecycleConfiguration.html) | ### Backup | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `PutBackupPolicy` | ✅ Supported | Stores ENABLED/DISABLED directly (no ENABLING/DISABLING transitional states); no AWS Backup integration | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_PutBackupPolicy.html) | | `DescribeBackupPolicy` | ✅ Supported | | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_DescribeBackupPolicy.html) | ### Policy | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `PutFileSystemPolicy` | ✅ Supported | Stores the policy document (JSON-validated); not enforced on requests | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_PutFileSystemPolicy.html) | | `DescribeFileSystemPolicy` | ✅ Supported | | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_DescribeFileSystemPolicy.html) | | `DeleteFileSystemPolicy` | ✅ Supported | | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_DeleteFileSystemPolicy.html) | ### Tags | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `TagResource` | ✅ Supported | Accepts file-system and access-point IDs or ARNs | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_TagResource.html) | | `UntagResource` | ✅ Supported | | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_UntagResource.html) | | `ListTagsForResource` | ✅ Supported | | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_ListTagsForResource.html) | | `CreateTags` | ✅ Supported | Legacy alias of TagResource (file systems only) | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_CreateTags.html) | | `DeleteTags` | ✅ Supported | Legacy alias of UntagResource (file systems only) | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_DeleteTags.html) | | `DescribeTags` | ✅ Supported | Legacy alias of ListTagsForResource (file systems only) | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_DescribeTags.html) | ### Account | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `DescribeAccountPreferences` | ✅ Supported | Defaults to LONG_ID | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_DescribeAccountPreferences.html) | | `PutAccountPreferences` | ✅ Supported | Stores the preference; generated IDs are always long-form | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_PutAccountPreferences.html) | ### Replication | Operation | Status | Notes | AWS Docs | | --- | --- | --- | --- | | `CreateReplicationConfiguration` | ❌ Unsupported | | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_CreateReplicationConfiguration.html) | | `DeleteReplicationConfiguration` | ❌ Unsupported | | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_DeleteReplicationConfiguration.html) | | `DescribeReplicationConfigurations` | ❌ Unsupported | | [docs](https://docs.aws.amazon.com/efs/latest/ug/API_DescribeReplicationConfigurations.html) | ## Related - [EFS](/docs/services/efs/index.md) — quick start, what works, and the differences from AWS - [All service pages](/docs/services/index.md)