Root-NFS: Server returned error -13 while mounting /home
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1、出现的问题:在开发板上挂载网络文件系统,修改之前的属性:
set bootargs noinitrd root=/dev/nfs nfsroot=192.168.1.106:/home/gab/work/root_fs/fs_mini_mdev ip=192.168.1.17:192.168.1.106:192.168.1.1:255.255.255.0::eth0:off init=/linuxrc console=ttySAC0
2、补充一下,设置bootargs noinitrd的模式为:
root=/dev/nfsnfsroot=[<server-ip>:]<root-dir>[,<nfs-options>]ip=<client-ip>:<server-ip>:<gw-ip>:<netmask>:<hostname>:<device>:<autoconf>init=/linuxrc console=ttySAC0
3、reset重启uboot,跳过uboot,加载linux内核后,启动文件系统报错:
Root-NFS: Server returned error -13 while mounting /homeVFS: 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 259712 mtdblock3 (driver?)Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
3、解决方案:
exportfs -a //用来加载所有文件系统
发现设置的共享文件系统目录不支持 NFS export
root@iBOY-ARM:/home/gab# exportfs -aexportfs: /home/gab/work/root_fs/fs_mini_mdev does not support NFS export
我的分析:
因为该目录位于gab用户下,我试过将该共享目录放在非用户目录下就可以了,将/home/gab/work/root_fs/fs_mini_mdev 复制到 /home目录下,然后在/etc/exports文件里添加:
/home/fs_mini_mdev *(rw,sync,no_subtree_check)
重新 exportfs -a 加载就没问题了
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