我有一台服务器，但我没有安装，它有 2 个版本的 Ubuntu，16 和 18。它在 16 版本上自动启动，我不想要这个版本，因为它会导致某些软件出现问题。我无法自动启动 18 版本。
要在 18 版本上启动，我必须在启动时从 grub 菜单中选择它。 grub 菜单项显示为Ubuntu 18.04.3 LTS (18.04) (on /dev/sdj4) 但没有sdj4！
lsblk 显示了这一点：
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 55,6M 1 loop /snap/core18/2714
loop1 7:1 0 116,8M 1 loop /snap/core/14946
loop3 7:3 0 116,8M 1 loop /snap/core/14784
loop4 7:4 0 73M 1 loop /snap/core22/583
loop5 7:5 0 452,4M 1 loop /snap/gnome-42-2204/56
loop6 7:6 0 63,3M 1 loop /snap/core20/1852
loop7 7:7 0 2,5M 1 loop /snap/gnome-calculator/884
loop8 7:8 0 460,3M 1 loop /snap/gnome-42-2204/65
loop9 7:9 0 162,9M 1 loop /snap/gnome-3-28-1804/145
loop10 7:10 0 63,3M 1 loop /snap/core20/1828
loop11 7:11 0 72,9M 1 loop /snap/core22/547
loop12 7:12 0 2,6M 1 loop /snap/gnome-system-monitor/178
loop13 7:13 0 346,3M 1 loop /snap/gnome-3-38-2004/115
loop14 7:14 0 219M 1 loop /snap/gnome-3-34-1804/77
loop15 7:15 0 476K 1 loop /snap/gnome-characters/781
loop16 7:16 0 1,5M 1 loop /snap/gnome-system-monitor/181
loop17 7:17 0 164,8M 1 loop /snap/gnome-3-28-1804/161
loop18 7:18 0 346,3M 1 loop /snap/gnome-3-38-2004/119
loop19 7:19 0 2,6M 1 loop /snap/gnome-calculator/920
loop20 7:20 0 4K 1 loop /snap/bare/5
loop21 7:21 0 219M 1 loop /snap/gnome-3-34-1804/72
loop22 7:22 0 556K 1 loop /snap/gnome-logs/112
loop23 7:23 0 704K 1 loop /snap/gnome-characters/741
loop24 7:24 0 91,7M 1 loop /snap/gtk-common-themes/1535
loop25 7:25 0 696K 1 loop /snap/gnome-logs/115
loop26 7:26 0 81,3M 1 loop /snap/gtk-common-themes/1534
loop27 7:27 0 55,6M 1 loop /snap/core18/2721
sda 8:0 0 7,3T 0 disk
├─sda1 8:1 0 7,3T 0 part
└─sda9 8:9 0 8M 0 part
sdb 8:16 0 7,3T 0 disk
├─sdb1 8:17 0 7,3T 0 part
└─sdb9 8:25 0 8M 0 part
sdc 8:32 0 7,3T 0 disk
├─sdc1 8:33 0 7,3T 0 part
└─sdc9 8:41 0 8M 0 part
sdd 8:48 0 7,3T 0 disk
├─sdd1 8:49 0 7,3T 0 part
└─sdd9 8:57 0 8M 0 part
sde 8:64 0 7,3T 0 disk
├─sde1 8:65 0 7,3T 0 part
└─sde9 8:73 0 8M 0 part
sdf 8:80 0 447,1G 0 disk
├─sdf1 8:81 0 1,9G 0 part /boot
├─sdf2 8:82 0 30,5G 0 part
├─sdf3 8:83 0 293,7G 0 part /home
├─sdf4 8:84 0 63G 0 part /
└─sdf5 8:85 0 58,1G 0 part
sdg 8:96 0 7,3T 0 disk
├─sdg1 8:97 0 7,3T 0 part
└─sdg9 8:105 0 8M 0 part
sdh 8:112 0 7,3T 0 disk
├─sdh1 8:113 0 7,3T 0 part
└─sdh9 8:121 0 8M 0 part
nvme0n1 259:0 0 3,7T 0 disk
nvme1n1 259:1 0 3,7T 0 disk
这怎么可能？
