It makes a remote disk look like a local block device, allowing cheap and safe realtime mirrors to be built over the net. It features internal block-journalling and multichannel failover. This is the first release in the development line for the current 2.4.0-test kernels. There are visible changes in the command line args, hence the version number jump from 2.2. All control communications now go over a single port.
Data communications use different sockets on the same port.
Several minor bugs associated with the 2.4.0-test kernel code have been fixed. All rights reserved.