Linux 读磁盘无权限
我在Linux下用open打开磁盘，没权限，chmod也不让用，怎么才能打开磁盘，读里面的数据？望高人指点。

C/C++ code

    char   dev[]  = "\/dev\/sdb";    int re = 0;    re = access(dev, R_OK);      if (re == -1)    {        if (errno == 13)            re = chmod(dev, S_IRGRP);    }    int fd = open(dev,O_RDONLY);