<p>It does that as a consistency check to be more sure that the data stored on disk was not modified or otherwise corrupted in the time the node was offline.</p>

CC BY-SA 4.0
2023-08-03T02:08:24.620Z
2023-08-03T02:08:24.620Z
Ava Chow
<p>I have observed that when I restart my Raspberry Pi, which I had left at a specific height (for example, 800,000), the software starts verifying the last x blocks, beginning from a point prior to height 800,000. Why does this occur since it had already verified those prior to 800,000?</p>

<bitcoin-core><validation>
Why does Bitcoin Core verify already verified blocks?
Angelo
# Why does Bitcoin Core verify already verified blocks?

(Asked by: username_0 on 2023-07-29)

I have observed that when I restart my Raspberry Pi, which I had left at a specific height (for example, 800,000), the software starts verifying the last x blocks, beginning from a point prior to height 800,000. Why does this occur since it had already verified those prior to 800,000?

**Tags:** bitcoin-core, validation


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## 1 answers

### Answer by username_1 on 2023-08-03. Score: 1

It does that as a consistency check to be more sure that the data stored on disk was not modified or otherwise corrupted in the time the node was offline.


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