On Mon, Mar 11, 2013 at 10:28:07AM +0800, majianpeng wrote: > Hi all, > I am trying to use dm-cache-target on raid5.But i met a question. > > Supposed: /dev/sdb1(5GB) is metadata; /dev/sdb2(20GB) is cache;/dev/md0 is raid5. > > 1:sutup my_cache > dmsetup create my_cache --table '0 41943040 cache /dev/sdb1 /dev/sdb2 /dev/md0 131072 1 writethrough default 0' 41943040 - This is 20G, you should use the size of /dev/md0 in sectors Also I think your block size is way too big, try 2048 rather tha 131072. > BTW, for dm-cache is it support plug-and-play? No idea what you mean. - Joe -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
