I am using dm-multipath on non-partitioned (xfs) devices on a SAN. If I resize the device, and rescan my path devices (i.e rescan /dev/sda, /dev/sdb, /dev/sdc,/dev/sdd (all the same path)) the kernel sees the new size of the individual devices, but the /sys/block/dm-0 device is still the old size. I believe this is the reason why I cannot grow my xfs filesystem without doing a reboot so that the dm device will have the new size. I'd like to avoid unmounting and rebooting to resize the device. I haven't played with lvm enough to feel comfortable using it. Is there any way to get the dm device to be the proper size, or is this a bug, or a feature that needs further discussion? Andy