Talk:Handling Full OSTs
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lctl deactivate does not make the OST read-only
The page says the OST is "rendered read-only using the lctl command" (deactivate). This is misleading -- files existing on the OST can still be opened and written to. Deactivation of the OST on the MDS only prevents new files from going there. Specifically, when using lfs_migrate to handle full OSTs, more care than noted here has to be taken in order to quiesce writes to the OST.