I created my own dm which performs some checks on writing / reading before it remaps the request to an underlying block dev. After I set it up and write changes (eg using 'dd') to /dev/mapper/<name>, I see it happened correctly (eg using 'hd' on /dev/mapper/<name>). However, the underlying block device did not change at all (again using 'hd' on /dev/sdb1 for example). 1. How is it possible that, even though the changes are not yet persisted to /dev/sdb1, the dm has the correct data? 2. Is this normal behavior? If not, what can I do or what am I doing wrong to fix this? Thanks! Cheers, Jasper -- dm-devel mailing list dm-devel@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/dm-devel
