iPhone 6 ios12.5.6 The mount failed

[He2168]

[ICH525]

localhost:~ root# mount_apfs /dev/disk0s1s1 /mnt1 localhost:~ root# /usr/libexec/seputil --load /mnt1/usr/standalone/firmware/sep-firmware.img4 seputil: can't open '/mnt1/usr/standalone/firmware/sep-firmware.img4' seputil: rejecting zero-byte firmware seputil: failed to load /mnt1/usr/standalone/firmware/sep-firmware.img4 in mode localhost:~ root# mount_apfs /dev/disk0s1s2 /mnt2 localhost:~ root# mount_apfs /dev/disk0s1s2 /mnt4 localhost:~ root# ls /mnt1 localhost:~ root# ls /mnt2 localhost:~ root# ls /mnt4 localhost:~ root# ls /mnt3 i tried everything include comment no #16