挂接sd卡 # mount -t vfat /dev/mmc/blk0/disc /tmp mmcblk0: error 2 transferring data end_request: I/O error, dev mmcblk0, sector 0 FAT: unable to read boot sector mount: mounting /dev/mmc/blk0/disc on /tmp failed 挂机网络文件系统 nfs warning: mount version older than kernel RPC: sendmsg returned error 101 portmap: RPC call returned error 101 RPC: failed to contact portmap (errno -101). RPC: sendmsg returned error 101 portmap: RPC call returned error 101 RPC: failed to contact portmap (errno -101). lockd_up: makesock failed, error=-101 RPC: sendmsg returned error 101 portmap: RPC call returned error 101 RPC: failed to contact portmap (errno -101). # QDir::readDirEntries: Cannot read the directory: /usr/lib/ipkg/externinfo 这是什么情况啊，我电脑室xp系统，在虚拟机上安装redhat9，现在虚拟机能够ping通开发板，开发板也能够ping通虚拟机，但是在mount的时候出现了上面的情况，高手帮帮忙啊