sar + why sar not displayed the real disks under DEV section

we have Linux machine with 2 disks - sda and sdb ( sda is the OS ) lsblk -d -e 11,1 NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT fd0 2:0 1 4K 0 disk sda 8:0 0 150G 0 disk sdb 8:16 0 70G 0 disk /GHT when we do sar -d , we get 12:00:01 AM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm %util 12:10:01 AM dev8-16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 12:10:01 AM dev8-0 0.12 0.07 1.93 16.87 0.00 0.48 0.28 0.00 12:10:01 AM dev253-0 0.01 0.07 0.04 8.00 0.00 0.38 0.37 0.00 12:10:01 AM dev253-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 12:10:01 AM dev253-2 0.12 0.00 1.89 15.53 0.00 0.51 0.23 0.00 12:20:01 AM dev8-16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 we can see that DEV devices not displayed as sda or sdb ( disks ) so how to know which is sda or sdb ? is it possible in some way to use sar, and displayed the real disks - sda or sdb?