# Input/output error when creating snapshot

**URL:** <https://discuss.elastic.co/t/input-output-error-when-creating-snapshot/318721>\
**Category:** Elasticsearch\
**Tags:** snapshot-and-restore\
**Created:** [November 11, 2022, 10:08am UTC](https://discuss.elastic.co/t/input-output-error-when-creating-snapshot/318721 "2022-11-11T10:08:53Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![lifer](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/lifer/32/94603_2.png) [@lifer](https://discuss.elastic.co/u/lifer)\
**Post date:** [November 11, 2022, 10:08am UTC](https://discuss.elastic.co/t/input-output-error-when-creating-snapshot/318721/1 "2022-11-11T10:08:53Z")

</div>

Hi!

We have a 3-nodes self-hosted ES 8.5 cluster, and when we make daily snapshots few shards fail every time with the following error:

> INTERNAL\_SERVER\_ERROR: UncategorizedExecutionException[Failed execution]; nested: ExecutionException[java.io.IOException: Input/output error]; nested: IOException[Input/output error]

Snapshots are stored on a standalone server, mounted as NFS on all ES nodes.

This is how snapshot repository is configured:

> curl -k -u "elastic:password" -XPUT '[https://10.1.2.3:9200/\_snapshot/nyx?pretty](https://10.1.2.3:9200/_snapshot/nyx?pretty)' -H 'Content-Type: application/json' -d '{  
> "type": "fs",  
> "settings": {  
> "location": "/mnt/backup/snapshots",  
> "compress": true  
> }  
> }'

Can you point me towards the way to debug these errors please?

---

<div class="post-metadata">

**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\
**Post date:** [November 11, 2022, 10:48am UTC](https://discuss.elastic.co/t/input-output-error-when-creating-snapshot/318721/2 "2022-11-11T10:48:38Z")

</div>

`Input/output error` is a low-level error message reported by the OS itself - see the entry for `EIO` on this page:

> **[Error Codes (The GNU C Library)](https://www.gnu.org/software/libc/manual/html_node/Error-Codes.html)**
>
> Error Codes (The GNU C Library)

Typically that means your hardware is broken, or something else is fundamentally wrong in your system, but this is nothing to do with Elasticsearch.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [December 9, 2022, 10:48am UTC](https://discuss.elastic.co/t/input-output-error-when-creating-snapshot/318721/3 "2022-12-09T10:48:53Z")

</div>

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.