[dm-crypt] Toggle read-only status of mapping

Dennis Birkholz dm-crypt at dennis.birkholz.biz
Tue Oct 23 06:55:21 CEST 2012

Hello together,

currently it is possible to create a read-only mapping, but to me it
seems not possible to switch a rw mapping to a ro mapping or vice versa.
I use Software-RAID5->Luks->Ext4, do switch everything to read-only I
have to unmount, remove crypt mapping, create ro crypt mapping, mount
ro, switch raid to ro but it would be very nice if I only can switch
everything to ro.


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