# What are the options for replacing disks on nodes of a running cluster? **URL:** \ **Category:** ScyllaDB\ **Tags:** administration, consistency\ **Created:** [January 29, 2025, 5:12am UTC](https://forum.scylladb.com/t/what-are-the-options-for-replacing-disks-on-nodes-of-a-running-cluster/4422 "2025-01-29T05:12:13Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![Guy](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.scylladb.com/guy/32/9_2.png) [@Guy](https://forum.scylladb.com/u/Guy)\ **Post date:** [January 29, 2025, 5:12am UTC](https://forum.scylladb.com/t/what-are-the-options-for-replacing-disks-on-nodes-of-a-running-cluster/4422/1 "2025-01-29T05:12:13Z")
> [@](#): > > [**Originally from the User Slack**](https://scylladb-users.slack.com/) > > ![Hyunwoo_Kim](https://us1.discourse-cdn.com/flex016/uploads/scylladb/original/2X/1/1321de3d4564097b9f0e13af4f71c38fb81726df.png) **@Hyunwoo\_Kim:** -------- > one more question 🙏 > > When there is 6-node cluster, and I need to replace the disks on 3 of the nodes. There seem to be two possible approaches. > > 1. **Decommistion and rejoin** : Decommision the nodes, replace the disks, and then rejoin them to the cluster > 2. **Drain and copy data** : Drain the node, replace the disks, and copy the data back to the new disks. > Which approach would be more suitable in terms of data consistency, and overall? > > ![avi](https://us1.discourse-cdn.com/flex016/uploads/scylladb/original/1X/b5e08becda8d9df1abff1d3a2d9ffe1126ac3fc6.jpeg) **@avi:** Decommission + bootstrap is safer, since you have 3 replicas at all points in the process. > > Drain + copy will be faster, but puts you at some risk in case another node fails during the process. > > ![Hyunwoo_Kim](https://us1.discourse-cdn.com/flex016/uploads/scylladb/original/2X/1/1321de3d4564097b9f0e13af4f71c38fb81726df.png) **@Hyunwoo\_Kim:** Sounds interesting… Thank you for answering. I’m gonna find more info about Drain + Copy 🙂