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I've an ec2 instance with root volume and additional volume attached, additional volume is 92% used.

I took a ebs snapshot , but looks like its very slow.

Can I go ahead and increase the volume size and expand the volume while snapshot is in progress ? or should I wait until the snapshot is finished ? Is it safe?

Swat
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    Your snapshot is safe once your started taking it. However, I am not sure if AWS will allow you to expand the volume while the snapshot operation is going on. If it allows you to do it, then you are safe. – FedKad Jul 28 '20 at 16:50
  • so we can also extend while its optimizing? – Swat Jul 28 '20 at 17:38

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Just if in case anyone has the same question, I was able to expand my volume while the volume was optimizing and when snapshot was in progress.

https://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/recognize-expanded-volume-windows.html

Swat
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  • What is "optimizing" in the context of EBS? Snapshot and resize are operations I've heard of, but not Optimizing. – Tim Jul 28 '20 at 19:29
  • After you issue a ModifyVolumeWhile the volume is in the optimizing state,the volume enters first the Modifying state, then the Optimizing state, and finally the Complete state. Volume performance is in between the source and target configuration specifications. More details here: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/monitoring-volume-modifications.html – Swat Jul 28 '20 at 20:02
  • Ah, a state rather than an operation. Gotcha thanks. – Tim Jul 28 '20 at 20:40