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Hello,
This is a question about original/alternate layout enforcement for RAID0
arrays with members of different sizes introduced by commits
c84a1372df929033cb1a0441fb57bd3932f39ac9 ("md/raid0: avoid RAID0 data
corruption due to layout confusion.)" and
33f2c35a54dfd75ad0e7e86918dcbe4de799a56c ("md: add feature flag
MD_FEATURE_RAID0_LAYOUT").
The layout is irrelevant if all members have the same size so the array
has only one zone. But isn't it also irrelevant if the array has two
zones and the second zone has only one device, for example if the array
has two members of different sizes ?