On 2018-06-27 09:58 PM, Qu Wenruo wrote: > > > On 2018年06月28日 09:42, Remi Gauvin wrote: >> There seems to be a major design flaw with BTRFS that needs to be better >> documented, to avoid massive data loss. >> >> Tested with Raid 1 on Ubuntu Kernel 4.15 >> >> The use case being tested was a Virtualbox VDI file created with >> NODATACOW attribute, (as is often suggested, due to the painful >> performance penalty of COW on these files.) > > NODATACOW implies NODATASUM. >
yes yes,, none of which changes the simple fact that if you use this option, which is often touted as outright necessary for some types of files, BTRFS raid is worse than useless,, not only will it not protect your data at all from bitrot, (as expected), it will actively go out of it's way to corrupt it! This is not expected behaviour from 'Raid', and I despair that seems to be something that I have to explain!
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