--- Logical volume ---
LV Path /dev/deb01-vg/home
LV Name home
VG Name deb01-vg
LV UUID NeLlQb-KK5b-BjFf-6Lt3-giYM-KCXv-9uo6h9
LV Write Access read/write
LV Creation host, time deb01, 2015-06-23 18:41:51 +0300
LV Status available
# open 1
LV Size 813.87 GiB
Current LE 208350
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:4

root@tug:/media/arro# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/dm-0 20G 5.9G 14G 31% /
udev 10M 0 10M 0% /dev
tmpfs 1.6G 18M 1.6G 2% /run
tmpfs 3.9G 498M 3.4G 13% /dev/shm
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/sdb1 1.8T 616G 1.1T 36% /media/2tera
/dev/sda1 236M 33M 191M 15% /boot
/dev/mapper/deb01--vg-home 801G 1.1G 760G 1% /home
/dev/mapper/deb01--vg-var 15G 2.5G 12G 18% /var
/dev/mapper/deb01--vg-tmp 2.3G 3.2M 2.2G 1% /tmp
tmpfs 790M 4.0K 790M 1% /run/user/115
tmpfs 790M 12K 790M 1% /run/user/1000

tune2fs -m 0 /dev/device не предлагать.