各位专家、各位同仁：
我在 ODROID N2+ SBC 上使用 128GB MMC 运行 Ubuntu 22.04.3，插入 USB 驱动器时重新挂载的根文件系统出现问题。
情况
“boot” 安装在 /dev/mmcblk1p1 上
“root” 安装在 /dev/mmcblk1p2 上
文件系统
# UNCONFIGURED FSTAB FOR BASE SYSTEM
/dev/mmcblk1p1 /media/boot ext2 errors=continue 0 1
/dev/mmcblk1p2 / ext4 errors=remount-ro 0 1
/dev/mmcblk1p4 none swap sw 0 0
//192.168.1.1/fritz/Seagate_500G /mnt/smb/fritz.box/ cifs vers=3.0,noserverino,credentials=/var/cifscredentials_fritzbox,iocharset=utf8,file_mode=0777,dir_mode=0777 0 0
tmpfs /dev/shm tmpfs defaults,rw,nodev,nofail,noatime,nosuid 0 0
#/dev/disk/by-id/scsi-SSamsung_SSD_870_EVO_250G_4BBB38EE1A62-part1 /mnt/sda1 ext2 errors=remount-ro 0 1
#/dev/sda1 /mnt/sda1 ext2 errors=remount-ro 0 1
#/dev/sda2 /mnt/sda2 ext4 errors=remount-ro 0 1
#/dev/sda3 /mnt/sda3 ext4 errors=remount-ro 0 1
#/dev/disk/by-id/scsi-SSamsung_SSD_870_EVO_250G_4BBB38EE1A62-part2 /mnt/sda2 ext4 errors=remount-ro 0 1
#/dev/disk/by-id/scsi-SSamsung_SSD_870_EVO_250G_4BBB38EE1A62-part3 /mnt/sda3 ext4 errors=remount-ro 0 1
/dev/disk/by-id/usb-WD_Elements_25A3_56474858304D4A47-0:0-part1 /mnt/sdb1 ext4 errors=remount-ro 0 1
/dev/disk/by-id/usb-WD_Elements_25A3_56474858304D4A47-0:0-part2 /mnt/sdb2 ext4 errors=remount-ro 0 1
/dev/disk/by-id/mmc-GE4S5_0x1dd86864-part1 /mnt/mmcblk1p1 ext2 errors=remount-ro 0 1
/dev/disk/by-id/mmc-GE4S5_0x1dd86864-part2 /mnt/mmcblk1p2 ext4 errors=remount-ro 0 1
/dev/disk/by-id/mmc-GE4S5_0x1dd86864-part3 /mnt/mmcblk1p3 ext4 errors=remount-ro 0 1
SSD连接前df的结果
odroid@bonna:~$ df
Filesystem 1K-blocks Used Available Use% Mounted on
tmpfs 375432 3108 372324 1% /run
/dev/mmcblk1p2 61017216 34021000 24468788 59% /
tmpfs 1877144 0 1877144 0% /dev/shm
tmpfs 5120 4 5116 1% /run/lock
tmpfs 1877144 20 1877124 1% /tmp
/dev/mmcblk1p1 245728 187188 45436 81% /media/boot
/dev/mmcblk1p3 174350364 28 165421056 1% /mnt/mmcblk1p3
//192.168.1.1/fritz/Seagate_500G 488394008 296031992 192362016 61% /mnt/smb/fritz.box
/dev/sda1 2112647068 354410232 1650846272 18% /mnt/sdb1
/dev/sda2 5620694080 354574192 4982778064 7% /mnt/sdb2
/dev/zram1 738048 147536 536752 22% /opt/zram/zram1
overlay1 738048 147536 536752 22% /var/lib/openhab/persistence
/dev/zram2 996780 44108 883860 5% /opt/zram/zram2
overlay2 996780 44108 883860 5% /var/log
tmpfs 375428 124 375304 1% /run/user/1000
具有相同分区表的 SSD 驱动器被识别为 /dev/sda(x)。
问题陈述
/dev/sda2
当 USB SSD 驱动器连接时，根文件系统会立即自动重新挂载 。
odroid@bonna:~$ df
Filesystem 1K-blocks Used Available Use% Mounted on
tmpfs 375432 3128 372304 1% /run
/dev/sda2 61017216 34021016 24468772 59% /
tmpfs 1877144 0 1877144 0% /dev/shm
tmpfs 5120 4 5116 1% /run/lock
tmpfs 1877144 20 1877124 1% /tmp
/dev/mmcblk1p1 245728 187188 45436 81% /media/boot
/dev/mmcblk1p3 174350364 28 165421056 1% /mnt/mmcblk1p3
//192.168.1.1/fritz/Seagate_500G 488394008 296031992 192362016 61% /mnt/smb/fritz.box
/dev/zram1 738048 147536 536752 22% /opt/zram/zram1
overlay1 738048 147536 536752 22% /var/lib/openhab/persistence
/dev/zram2 996780 44464 883504 5% /opt/zram/zram2
overlay2 996780 44464 883504 5% /var/log
tmpfs 375428 124 375304 1% /run/user/1000
/dev/sda1 245728 187188 45436 81% /media/usb0
/dev/sda2 61017216 23240956 35248832 40% /media/usb1
/dev/sda3 174350364 28 165421056 1% /media/usb2
问题
什么服务/配置导致了此行为？我该怎么做才能关闭 rootfs 自动重新挂载到 /dev/sda2？
干杯