I've greatly enjoyed using mdadm, but have been puzzled by one piece of its behaviour. If used to to build a prexisting Windows Raid array with -build, e.g.:
mdadm -B -c 64 -l 1 -n 2 /dev/md2 /dev/hda1 /dev/hdb1
where Windows has built a healthy RAID1 array on the first partitions of /dev/hda1 and bdb1, all seems to go well.
The array is mountable with the kernel ntfs driver ro or rw. Using ntfs-3g, however, is impossible as apparently the device size is smaller than the volume size (as found by ntfsresize -i /dev/md2, for example, see the thread below)
Thinking this to be a ntfs-3g problem, I contacted the developer,
http://forum.ntfs-3g.org/viewtopic.php?f=3&t=1125
but apparently they feel this is a mdadm problem. I did some testing, and the problem is independent of whether dmraid is in use or not. Searching around the web yields similar problems with Windows Raid-0 and Raid-5 arrays, all with the same issue.
Any clues?
