title: Is rehydration of the (Azure Blob Storage) archive tier always needed?
body: <p>I have studied the following link to understand the Hot, Cool and Archive tiers of Azure Storage V2.</p>
  
  <p><a href="https://docs.microsoft.com/en-us/azure/storage/blobs/storage-blob-storage-tiers" rel="nofollow noreferrer">https://docs.microsoft.com/en-us/azure/storage/blobs/storage-blob-storage-tiers</a></p>
  
  <p>In the <strong>Blob rehydration</strong> section it says:</p>
  
  <blockquote>
    <p>To read data in archive storage, you must first change the tier of the blob to hot or cool. This process is known as rehydration and can take up to 15 hours to complete.</p>
  </blockquote>
  
  <p>My questions are:</p>
  
  <ol>
  <li>Can I get just list of all blobs without rehydration? Is it going to cost me?</li>
  <li>Do I have to perform rehydration before reading/deleting a single file?</li>
  <li>Do I have to perform rehydration to delete a file before 180 days?</li>
  </ol>