On 2019-02-12 2:47 a.m., Qu Wenruo wrote: > > > Consider this use case: > > One btrfs with 2 devices, RAID1 for data and metadata. > > One day devid 2 got failure, and before replacement arrives, user can > only use devid 1 alone. (Maybe that's the root fs). > > Then new disk arrived, user replaced the missing device, caused SINGLE > or DUP chunks on devid 1, and more importantly, some metadata/data is > already in DUP/SINGLE chunks. >
Maybe the btrfs-replace command can have some magic logic attached that checks for single/dup chunks after completion and either launches an automatic convert, or prompts the user that one is probably needed?
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