# How the real data is stored in data disk? **URL:** \ **Category:** Elasticsearch\ **Created:** [March 17, 2021, 10:49am UTC](https://discuss.elastic.co/t/how-the-real-data-is-stored-in-data-disk/267476 "2021-03-17T10:49:57Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Jax\_dev](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jax_dev/32/79117_2.png) [@Jax\_dev](https://discuss.elastic.co/u/Jax_dev)\ **Post date:** [March 17, 2021, 10:49am UTC](https://discuss.elastic.co/t/how-the-real-data-is-stored-in-data-disk/267476/1 "2021-03-17T10:49:57Z")
I have executed below api GET "/\_cat/shards?v" it has shown all the indices in which one of the indices has taken 302 GB. When I have checked the mounted disk ( mentioned in path.data ) which elastic is being used, it shows only 40GB in the utilization. How come this is possible ? Will data is compressed while storing in the disk ? Any reference doc would be really helpful. ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [March 22, 2021, 1:58am UTC](https://discuss.elastic.co/t/how-the-real-data-is-stored-in-data-disk/267476/2 "2021-03-22T01:58:46Z")
Is this related to [How much disk storage required to take backup of index which is having 300GB?](https://discuss.elastic.co/t/how-much-disk-storage-required-to-take-backup-of-index-which-is-having-300gb/267424)? ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [April 19, 2021, 1:59am UTC](https://discuss.elastic.co/t/how-the-real-data-is-stored-in-data-disk/267476/3 "2021-04-19T01:59:29Z")
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