# Is it good to have a single separate physical SSD disk (not raid-0) for commitlog?

**URL:** <https://forum.scylladb.com/t/is-it-good-to-have-a-single-separate-physical-ssd-disk-not-raid-0-for-commitlog/4889>\
**Category:** ScyllaDB\
**Tags:** administration, configuration, storage\
**Created:** [June 9, 2025, 3:47am UTC](https://forum.scylladb.com/t/is-it-good-to-have-a-single-separate-physical-ssd-disk-not-raid-0-for-commitlog/4889 "2025-06-09T03:47:34Z")\
**Posts on this page:** 1\
**Page:** 1

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**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:** [June 9, 2025, 3:47am UTC](https://forum.scylladb.com/t/is-it-good-to-have-a-single-separate-physical-ssd-disk-not-raid-0-for-commitlog/4889/1 "2025-06-09T03:47:34Z")

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> [@](#):
>
> [**Originally from the User Slack**](https://slack.scylladb.com/)
> 
> ![Mahdi_Kamali](https://us1.discourse-cdn.com/flex016/uploads/scylladb/original/2X/7/7fb1a0a118e8eb1518763300c376e9c0ce9db7bc.png) **@Mahdi\_Kamali:** Is it good to have a single separate physical SSD disk (not raid-0) for _commitlog_? Does it give better performance? (Assume we have 6 same SSD disks with raid-0 for _/var/lib/scylla_ directory)
> 
> ![avi](https://us1.discourse-cdn.com/flex016/uploads/scylladb/original/1X/b5e08becda8d9df1abff1d3a2d9ffe1126ac3fc6.jpeg) **@avi:** It’s better to share the data and commitlog disks so that the available bandwidth can go where it’s most needed.