我无法访问操作系统为Ubuntu 18.04的笔记本电脑上安装的第二个硬盘驱动器。
每个nvme1n1 259:0 0 953.9G 0 disk, nvme0n1 259:1 0 477G 0 disk的输出都可以在笔记本电脑（lsblk -d）上看到物理上的附加硬盘。
但是，“主目录”目录中的df -h .仅产生/dev/nvme1n1p3 933G 847G 39G 96% /，它与硬盘驱动器的音调匹配。而没有选择来查看/使用黄色的硬盘空间。我该如何访问？
$ lsblk -d
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 31.9M 1 loop /snap/gtk-common-themes/3
loop1 7:1 0 139.5M 1 loop /snap/gnome-3-26-1604/64
loop2 7:2 0 14.5M 1 loop /snap/gnome-logs/34
loop3 7:3 0 142.3M 1 loop /snap/slack/13
loop4 7:4 0 55.8M 1 loop /snap/kata-containers/288
loop5 7:5 0 55M 1 loop /snap/kata-containers/278
loop6 7:6 0 14.8M 1 loop /snap/gnome-characters/206
loop7 7:7 0 297.1M 1 loop /snap/pycharm-community/128
loop8 7:8 0 201.6M 1 loop /snap/atom/227
loop9 7:9 0 294.2M 1 loop /snap/pycharm-community/121
loop10 7:10 0 54.8M 1 loop /snap/kata-containers/154
loop11 7:11 0 3.7M 1 loop /snap/gnome-system-monitor/70
loop12 7:12 0 167.2M 1 loop /snap/clementine/274
loop13 7:13 0 35.3M 1 loop /snap/gtk-common-themes/1198
loop14 7:14 0 1008K 1 loop /snap/gnome-logs/61
loop15 7:15 0 14.8M 1 loop /snap/gnome-characters/258
loop16 7:16 0 151M 1 loop /snap/gnome-3-28-1804/36
loop17 7:17 0 167M 1 loop /snap/clementine/461
loop18 7:18 0 14.8M 1 loop /snap/gnome-characters/254
loop19 7:19 0 89.3M 1 loop /snap/core/6673
loop20 7:20 0 4M 1 loop /snap/gnome-calculator/352
loop21 7:21 0 4M 1 loop /snap/gnome-calculator/406
loop22 7:22 0 3.7M 1 loop /snap/gnome-system-monitor/77
loop23 7:23 0 53.7M 1 loop /snap/core18/941
loop24 7:24 0 3.7M 1 loop /snap/gnome-system-monitor/81
loop25 7:25 0 2.3M 1 loop /snap/gnome-calculator/170
loop26 7:26 0 151M 1 loop /snap/gnome-3-28-1804/40
loop27 7:27 0 53.7M 1 loop /snap/core18/782
loop28 7:28 0 86.6M 1 loop /snap/core/4650
loop29 7:29 0 295.9M 1 loop /snap/pycharm-community/123
loop30 7:30 0 198.1M 1 loop /snap/atom/226
loop31 7:31 0 198.1M 1 loop /snap/atom/225
loop32 7:32 0 132.1M 1 loop /snap/postman/81
loop33 7:33 0 144.9M 1 loop /snap/slack/12
loop34 7:34 0 1008K 1 loop /snap/gnome-logs/57
loop35 7:35 0 151M 1 loop /snap/gnome-3-28-1804/31
loop36 7:36 0 89.4M 1 loop /snap/core/6818
loop37 7:37 0 140.7M 1 loop /snap/gnome-3-26-1604/82
nvme1n1 259:0 0 953.9G 0 disk
nvme0n1 259:1 0 477G 0 disk