AWS mgn documentation change
Summary
Added 'Replication stuck at Attach Staging Disks' error documentation
Security assessment
Documents a resource limitation issue (EBS volume attachment limits) with operational resolutions. No evidence of security vulnerability or security feature documentation.
Diff
diff --git a/mgn/latest/ug/common-replication-errors.md b/mgn/latest/ug/common-replication-errors.md index 47eaf6eb5..bd2e5298a 100644 --- a//mgn/latest/ug/common-replication-errors.md +++ b//mgn/latest/ug/common-replication-errors.md @@ -7 +7 @@ -Agent not seenNot convergingSnapshot failureUnstable networkFailed to connect AWS replication Agent to replication softwareFailed to establish communication with replication softwareFailed to create firewall rulesFailed to authenticate with serviceFailed to create staging disksFailed to pair the replication agent with replication serverStalled replication when replicating a source volume smaller than 1MiBUnknown data replication errorMissing Amazon Linux 2023 repository configuration +Agent not seenNot convergingSnapshot failureUnstable networkFailed to connect AWS replication Agent to replication softwareFailed to establish communication with replication softwareFailed to create firewall rulesFailed to authenticate with serviceFailed to create staging disksReplication stuck at Attach Staging DisksFailed to pair the replication agent with replication serverStalled replication when replicating a source volume smaller than 1MiBUnknown data replication errorMissing Amazon Linux 2023 repository configuration @@ -34,0 +35,2 @@ This section describes common replication errors, possible explanations, and pot + * Replication stuck at Attach Staging Disks + @@ -138,0 +141,17 @@ Check your CloudTrail logs for any errors in the CreateVolume API call. Then ens +## Replication stuck at Attach Staging Disks + +If replication is stuck at the "Attach Staging Disks" stage during initial sync, the replication server may have reached the maximum number of Amazon EBS volumes that can be attached to the instance type. + +**Cause:** By default, Application Migration Service uses a single replication server per 15 source disks. If the total number of disks across source servers sharing a replication server exceeds the Amazon EBS volume attachment limit of the replication server instance type, the attach operation will stall. + +**Resolution:** + + * Use a replication server instance type that supports more Amazon EBS volume attachments. For a list of instance types and their supported volume counts, see [General purpose instances – EBS specifications](https://docs.aws.amazon.com/ec2/latest/instancetypes/gp.html#gp_storage-ebs). + + * Use [dedicated replication servers](https://docs.aws.amazon.com/mgn/latest/ug/replication-server-settings.html#dedicated-replication-server) to reduce the number of disks per replication server. + + * Reduce the number of disks being replicated per source server by excluding unnecessary volumes during agent installation. + + + +