# Could not create rrd4j database file (Read-only file system)

**URL:** <https://community.openhab.org/t/could-not-create-rrd4j-database-file-read-only-file-system/117867>\
**Category:** Items & Sitemaps\
**Tags:** persistence, openhab3\
**Created:** [February 25, 2021, 4:57pm UTC](https://community.openhab.org/t/could-not-create-rrd4j-database-file-read-only-file-system/117867 "2021-02-25T16:57:09Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![mstormi](https://community.openhab.org/user_avatar/community.openhab.org/mstormi/32/55857_2.png) [@mstormi](https://community.openhab.org/u/mstormi)\
**Post date:** [August 20, 2021, 11:56pm UTC](https://community.openhab.org/t/could-not-create-rrd4j-database-file-read-only-file-system/117867/8 "2021-08-20T23:56:23Z")

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> [@RiotMode](#):
>
> now i have (no space left on device)  
> lol , its a 128 GB SSD

No the (now full) zram device is in RAM.  
You have moved to an SSD. That is not supported for openHABian, and you should have disabled zram [as the docs indicate](https://www.openhab.org/docs/installation/openhabian.html#availability-and-backup).

PS: mind the forum rules please. Open a separate thread as your issue is unrelated to the OP. Do not address people. And no screenshots please.  
[How to ask a good question / Help Us Help You - Tutorials & Examples - openHAB Community](https://community.openhab.org/t/how-to-ask-a-good-question-help-us-help-you/58396)

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