Device mapper is in 2.6.9 and later, so you just need to make sure it is enabled either as a module or builtin to the kernel. Look for /sys/class/misc/device-mapper or look in /proc/devices for a device-mapper entry to see if it is enabled. If neither are there, try modprobe dm_mod, then check again. For versions previous to 2.6.9, either you or your distro must patch the kernel to support it. Check the [StackOverflow: Lua] .:: sk.pinterest.com ::. .:: telegra.ph ::. .:: www3.uwsp.edu ::. [Scientific Data: Malware] .:: telegra.ph ::. .:: s666---link-dang-nhap-s666.webflow.io ::. device mapper web page for more information.