Hi Peter, > What definition of bandwidth does it use? Does it for example account > for seek latency? The bandwidth in dm-band is determined by the proportion of the processing time of each device's tokens(I/Os) to the processing time of all device's tokens(I/Os). The processing time of one token(I/O) is determined by one I/O cycle include seek latency, interrupt latency, etc... Thanks, Ryo Tsuruta <ryov@xxxxxxxxxxxxx> -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel