# ES data migration

**URL:** <https://discuss.elastic.co/t/es-data-migration/162059>\
**Category:** Elasticsearch\
**Created:** [December 25, 2018, 10:44am UTC](https://discuss.elastic.co/t/es-data-migration/162059 "2018-12-25T10:44:27Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![yan\_gong](https://avatars.discourse-cdn.com/v4/letter/y/9d8465/32.png) [@yan\_gong](https://discuss.elastic.co/u/yan_gong)\
**Post date:** [December 25, 2018, 10:44am UTC](https://discuss.elastic.co/t/es-data-migration/162059/1 "2018-12-25T10:44:27Z")

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Hi, I am using Es 5.X.X. Now my es data disk is SSD .I want to change my disk to HDD.  
Anyone can tell me how to do ?

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**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [December 25, 2018, 2:08pm UTC](https://discuss.elastic.co/t/es-data-migration/162059/2 "2018-12-25T14:08:55Z")

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Is it a hardware question?  
Is it an elasticsearch question ?

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**Author:** ![yan\_gong](https://avatars.discourse-cdn.com/v4/letter/y/9d8465/32.png) [@yan\_gong](https://discuss.elastic.co/u/yan_gong)\
**Post date:** [December 26, 2018, 7:48am UTC](https://discuss.elastic.co/t/es-data-migration/162059/3 "2018-12-26T07:48:53Z")

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Sorry @dadoonet ,I don't describe my question exhaustively.  
I hava a data path in an Elasticsearch data node mounted a SSD Disk (300G) , there is about 40G of data in the disk .Now I want to change my disk to HDD . so I must mount a HDD disk to the data node and umount the SSD after datas migration . Besides , it should make no difference to the production environment.  
I don't know how to do ?

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**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [January 3, 2019, 1:52pm UTC](https://discuss.elastic.co/t/es-data-migration/162059/4 "2019-01-03T13:52:06Z")

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If I got it correctly, you can:

- stop elasticsearch
- mount the new HDD disk
- move elasticsearch data dir from `/ssd/data` to `/hdd/data` (not real names)
- change `elasticsearch.yml` and set `path.data: /hdd/data`
- restart elasticsearch

I believe this should work.

Small question though: why do you want to use a slower disk?

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [January 31, 2019, 1:52pm UTC](https://discuss.elastic.co/t/es-data-migration/162059/5 "2019-01-31T13:52:13Z")

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