嵌入式学习，初始重烧整个系统

初学嵌入式，在重烧整个系统后（包括开发板的内核和文件系统），启动reset开发板出现一下代码，开发板不能正常使用

Looking up port of RPC 100003/2 on 192.168.0.103
rpcbind: server 192.168.0.103 not responding, timed out
Root-NFS: Unable to get nfsd port number from server, using default
Looking up port of RPC 100005/1 on 192.168.0.103
rpcbind: server 192.168.0.103 not responding, timed out
Root-NFS: Unable to get mountd port number from server, using default
mount: server 192.168.0.103 not responding, timed out
Root-NFS: Server returned error -5 while mounting /home/bigyellow/desktop/nfs/fs_mini_mdev
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "nfs" or unknown-block(2,0)
Please append a correct "root=" boot option; here are the available partitions:
1f00 256 mtdblock0 (driver?)
1f01 128 mtdblock1 (driver?)
1f02 2048 mtdblock2 (driver?)
1f03 521856 mtdblock3 (driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-bloc
开发板显示如下图

k(2,0)