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Andrea Mazzoleni 2025-10-14 11:14:51 +02:00
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@ -179,8 +179,11 @@ http://www.eecs.berkeley.edu/Pubs/TechRpts/1987/5853.html
<h3>Notes</h3>
<p>
<a id="note1">[1]</a> - unRAID lacks native checksums and ignores silent errors. If a parity error results from a silent data error, the parity is automatically recomputed, making it impossible to recover the silent error, even manually.
To get a similar functionality of SnapRAID, you have to use the Btrfs filesystems for all your data disks.
<a id="note1">[1]</a> - unRAID lacks native checksums and ignores silent errors.
Even worse, if a parity mismatch is detected due to a silent error in the data,
the parity is automatically recomputed, making it impossible to recover the silent error, even manually.
Integrity checksum plugins do not help in this case, as they are not integrated into the parity-checking process.
To achieve functionality similar to SnapRAID, you would need to use the Btrfs filesystem for all your data disks.
</p>
<p>
@ -211,7 +214,7 @@ ZFS also employs a suboptimal RAID-Z3 algorithm that requires roughly twice the
<a id="note8">[8]</a> - unRAID can use integrity checksums via plugins like <a href="https://forums.lime-technology.com/topic/43290-dynamix-file-integrity-plugin/">Dynamix File Integrity</a>, or <a href="https://forums.lime-technology.com/topic/35615-bunker-yet-another-utility-for-file-integrity-checks/">bunker</a>.
However, these are independent of parity processing and not used to aid recovery.
For example, when recovering a single failed disk with dual parity, checksums can identify additional silent errors to facilitate recovery.
To get a similar functionality of SnapRAID, you have to use the Btrfs filesystems for all your data disks.
To achieve functionality similar to SnapRAID, you would need to use the Btrfs filesystem for all your data disks.
</p>
<p>