On 11/01/2011 06:10 PM, Sanjana Shari wrote: > Using the remaining of first half of the same blockdevice /dev/loop0. > This seems to work. So I ma confused here how the mapping works.. There is no magic for linear mapping. Imagine you have this mapping table 0 8 linear /dev/sdb 1000 8 8 linear /dev/sdc 500 It means you created 16 sectors device consisting of two segments. First half (sectors 0-7) is mapped to /dev/sdb starting at sector 10000. (IOW sectors 0-7 of newly mapped device is mapped to sectors 10000-10007 of /dev/sdb) Second half (sectors 8-15) is mapped to /dev/sdc starting at sector 500. See dmsetup man page, where linear mapping is described. Just do not confuse source and destination device offset. Milan -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
