# Can you grow a bcache cachedev without reformat?

- From: Eric Wheeler \<hidden\>
- Date: 2021-07-29 00:43:45 
- List: linux-bcache
- Page: https://ratatoskr.run/linux-bcache/2021/07/7648119
- Thread: https://ratatoskr.run/linux-bcache/2021/07/7648119/t.md

```text
Hello all,

I know you can grow a backing device by unregister/re-register, but what 
about a cache dev?  

Will bcache detect a large cache volume if I unregister/re-register, or 
does it need reformatted with make-bcache -C ?


--
Eric Wheeler
```