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Andrea Mazzoleni 2025-10-31 09:39:19 +01:00
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@ -143,11 +143,14 @@ https://blogs.technet.microsoft.com/tip_of_the_day/2014/07/23/tip-of-the-day-dua
<td>One</td><td>One</td><td>All</td><td>All</td><td>All</td></tr>
<tr><td><span class="bold">Filled disks</span><br>Can you start with already filled disks?</td>
<td>Yes</td><td>Partial <a href="#note4">[4]</a></td><td>No</td><td>No</td><td>No</td></tr>
<td>Yes</td><td>Yes</a></td><td>No</td><td>No</td><td>No</td></tr>
<tr><td><span class="bold">Add disks</span><br>Can disks be added later?</td>
<td>Yes</td><td>Yes</td><td>Yes</a></td><td>Yes</td><td>Yes</td></tr>
<tr><td><span class="bold">Is it safe</span><br>to add disks?</td>
<td>Yes</td><td>No <a href="#note4">[4]</a></td><td>Yes</a></td><td>Yes</td><td>Yes</td></tr>
<!--
Until 2024 it was "ZFS does't allow to add new disks to a raidz pool"
http://serverfault.com/questions/190207/how-can-i-add-one-disk-to-an-existing-raidz-zpool
@ -197,7 +200,8 @@ ZFS also employs a suboptimal RAID-Z3 algorithm that requires roughly twice the
</p>
<p>
<a id="note4">[4]</a> - unRAID supports filled disks only if they are formatted with XFS or Btrfs filesystems, but not ext4 or NTFS, the two most common filesystems for Linux and Windows.
<a id="note4">[4]</a> - unRAID completely rebuilds parity when adding a new disk that already contains data, and during this process the existing data in the array is not protected.
This is a serious flaw, as a full parity rebuild puts considerable stress on all drives. If any disk is near failure, there’s a high risk it could fail during this operation.
</p>
<p>