# osd 的 scrub

Ceph通過Scrub歸置組(PG)來保證資料的完整性。在物件存儲層，Ceph Scrub類似於fsck

下圖為scrub過程

![](https://529150212-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-Lh81JtaIQ84bwQqz_Wh%2F-LvDcqNZzUqyGP3LQLrO%2F-LvDkwpz7rPP7ysuMKm0%2Fimage.png?alt=media\&token=bb5a19cc-c27a-4009-94ba-6418c7cc4ba0)