Shaya Potter wrote:
[please cc: me on responses]
if one read Documentation/fs/ntfs.txt in the linux kernel, it talks
about accessing windows raid volumes in Linux
If one is using non raid-5, one can use the device mapper, but if one is
using raid-5, one has to use the md driver.
However, it seems to be about using raidtools (raidtab and the like).
Can anyone who understand raidtools and mdadm translate the instructions
to mdadm, as that would seem to be what most of us use today?
The biggest thing here is that, since Windows stores its RAID
information in this LDM area, which is outside the partitions
themselves, there is no room for an md superblock at the end of each
partition (even if the RAID information was on each partition, it's
doubtful there would be room for an md superblock). So you have to
assemble the array without superblocks, or else the md superblocks will
overwrite data.
There is currently no way to "Build" (i.e., assemble an array without
using superblocks) a raid5 array using mdadm. I don't know if raidtools
would allow that or not. Building arrays without superblocks is
generally risky (since device states and roles are not persistently
tracked) for anything other than simple non-RAID arrays, or read-only
access to your data.
--
Paul
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