请问nfs挂载报这样的错该如何解决？
我板子想通过nfs挂载板子自带的rootfsfile:///C:\Users\敏\AppData\Roaming\Tencent\Users\464044001\QQ\WinTemp\RichOle\64OCPJEI_7ENHKQ]@[@E275.jpg文件系统，步骤是按文档上来的，关于nfs在电脑上用mount命令测试是可用的，在板子上挂载却报错：ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
IP-Config: Complete:
device=eth0, addr=192.168.1.6, mask=255.255.255.0, gw=192.168.1.6,
host=www, domain=, nis-domain=embedsky.com,
bootserver=192.168.1.8, rootserver=192.168.1.8, rootpath=
***************在此处出现了错误**************************
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 128 mtdblock0(driver?)
1f01 128 mtdblock1(driver?)
1f02 128 mtdblock2(driver?)
1f03 128 mtdblock3(driver?)
1f04 1920 mtdblock4(driver?)
1f05 128 mtdblock5(driver?)
1f06 3072 mtdblock6(driver?)
1f07 5120 mtdblock7(driver?)
1f08 1037824 mtdblock8(driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
Backtrace:
[<c00181e0>] (dump_backtrace+0x0/0x10c) from [<c05f1fbc>] (dump_stack+0x18/0x1c)
r7:c074f4e8 r6:00008000 r5:c08b7810 r4:c08b7810
[<c05f1fa4>] (dump_stack+0x0/0x1c) from [<c05f2024>] (panic+0x64/0x198)
[<c05f1fc0>] (panic+0x0/0x198) from [<c0816d8c>] (mount_block_root+0x174/0x228)
r3:00000000 r2:00000000 r1:df82df58 r0:c074f598
[<c0816c18>] (mount_block_root+0x0/0x228) from [<c0816ef0>] (mount_root+0xb0/0xcc)
[<c0816e40>] (mount_root+0x0/0xcc) from [<c0817074>] (prepare_namespace+0x168/0x1c0)
r4:c08b68e0
[<c0816f0c>] (prepare_namespace+0x0/0x1c0) from [<c08162f8>] (kernel_init+0xf0/0x124)
r5:c0853bec r4:c08b6880
[<c0816208>] (kernel_init+0x0/0x124) from [<c003f564>] (do_exit+0x0/0x69c)
r5:c0816208 r4:00000000
求解，这错误是什么原因造成的？
file:///C:\Users\敏\AppData\Roaming\Tencent\Users\464044001\QQ\WinTemp\RichOle\64OCPJEI_7ENHKQ]@[@E275.jpg
file:///C:\Users\敏\AppData\Roaming\Tencent\Users\464044001\QQ\WinTemp\RichOle\64OCPJEI_7ENHKQ]@[@E275.jpg
file:///C:\Users\敏\AppData\Roaming\Tencent\Users\464044001\QQ\WinTemp\RichOle\64OCPJEI_7ENHKQ]@[@E275.jpg
file:///C:\Users\敏\AppData\Roaming\Tencent\Users\464044001\QQ\WinTemp\RichOle\64OCPJEI_7ENHKQ]@[@E275.jpg
我发邮件给天嵌，也没解决这个问题
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