error at repair filesystem of /data and mount /data

device : ghost
problem 1: error while wiping /data due to mount error
issue: due corrupt of /data partition

fix1: fastboot erase userdata
fix2: change file system to extfs1 or extfs2 or extfs3 or exts4 or FAT
whichever works for data wipe

fix3 :   Boot into TWRP or any other similar recovery.
    Enter adb shell in a terminal on your PC while running recovery on the phone.
    Enter e2fsck /dev/block/platform/msm_sdcc.1/by-name/persist