ubuntu20.04挂载不上，求助大神

缘梦CC

设备挂载ubuntu20.04下的根文件系统超时打印如下信息时: [  312.163204] VFS: Unable to mount root fs via NFS, trying floppy. [  312.169823] VFS: Cannot open root device "nfs" or unknown-block(2,0): error -6 [  312.177198] Please append a correct "root=" boot option; here are the available partitions: [  312.185635] 0100           65536 ram0  (driver?) [  312.190285] 0101           65536 ram1  (driver?) [  312.195056] 0102           65536 ram2  (driver?) [  312.199701] 0103           65536 ram3  (driver?) [  312.204404] 0104           65536 ram4  (driver?) [  312.209045] 0105           65536 ram5  (driver?) [  312.213738] 0106           65536 ram6  (driver?) [  312.218382] 0107           65536 ram7  (driver?) [  312.223068] 0108           65536 ram8  (driver?) [  312.227711] 0109           65536 ram9  (driver?) [  312.232351] 010a           65536 ram10  (driver?) [  312.237104] 010b           65536 ram11  (driver?) [  312.241830] 010c           65536 ram12  (driver?) [  312.246584] 010d           65536 ram13  (driver?) [  312.251312] 010e           65536 ram14  (driver?) [  312.256062] 010f           65536 ram15  (driver?) [  312.260798] b300        15558144 mmcblk0  driver: mmcblk [  312.266157]   b301        15554048 mmcblk0p1 00000000-01 [  312.271492] b308         7634944 mmcblk1  driver: mmcblk [  312.276853]   b309          131072 mmcblk1p1 d89851a8-01 [  312.282187]   b30a         7493632 mmcblk1p2 d89851a8-02 [  312.287544] b320             512 mmcblk1rpmb  (driver?) [  312.292794] b318            4096 mmcblk1boot1  (driver?) [  312.298161] b310            4096 mmcblk1boot0  (driver?) [  312.303513] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0) [  312.311793] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)

xiaoxiao315

可以先在uboot用nfs指令测试一下，Ubuntu虚拟机里面设置的nfs文件夹下的文件是否可以正常读取，不行的话可以试试修改一下nfs配置的协议版本，一般来说uboot可以正常用nfs指令获取到，内核用nfs挂载根目录都可以成功的