Linux, Ramdisk.
lv_size ol/root LSize 10268672.00k Create a ramdisk a little larger than that (at least 8M larger): # modprobe brd rd_nr=1 rd_size=$((10268672 + 8*1024)) Verify the created disk: # lsblk /dev/ram0 NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT ram0 1:0 0 9.8G 0 disk Put the disk under lvm control #