无法读取设备/ dev / loop0

我试图在我的loop0设备上创build一个encryption的驱动器。 对于这个命令

/sbin/cryptsetup create cryptedDrive /dev/loop0 

我收到以下错误

无法读取设备/ dev / loop0

这是我为loop3设备输出的strace：

• 有没有办法查看哪些组/用户可以访问RSA密钥容器？
• LetsEncrypt证书更新失败
• TrueCrypt或EFS？
• encryptionApache Web服务器和MySQL服务器之间的连接
• 哪些书会帮助我学习SSL / PKI的所有知识？

（为了更好的粘贴 – > pastebin ）

 munmap(0xb7845000, 4096) = 0 mlockall(MCL_CURRENT|MCL_FUTURE) = 0 getpriority(PRIO_PROCESS, 0) = 20 setpriority(PRIO_PROCESS, 0, -18) = 0 stat64("/dev/loop3", {st_mode=S_IFBLK|0660, st_rdev=makedev(7, 3), ...}) = 0 open("/dev/loop3", O_RDONLY|O_SYNC|O_DIRECT|O_LARGEFILE) = 3 ioctl(3, BLKSSZGET, 0xbff2ad84) = 0 fstatfs64(3, 84, {f_type=0x1021994, f_bsize=4096, f_blocks=46077, f_bfree=46033, f_bavail=46033, f_files=46077, f_ffree=45421, f_fsid={0, 0}, f_namelen=255, f_frsize=4096}) = 0 fstat64(3, {st_mode=S_IFBLK|0660, st_rdev=makedev(7, 3), ...}) = 0 open("/proc/mounts", O_RDONLY) = 4 fstat64(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7845000 read(4, "rootfs / rootfs rw 0 0\nnone /sys"..., 1024) = 873 stat64("/dev/shm", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=40, ...}) = 0 stat64("/var/run", {st_mode=S_IFDIR|0755, st_size=460, ...}) = 0 stat64("/var/lock", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=60, ...}) = 0 stat64("/lib/init/rw", {st_mode=S_IFDIR|0755, st_size=60, ...}) = 0 read(4, "", 1024) = 0 _llseek(4, 0, [0], SEEK_SET) = 0 read(4, "rootfs / rootfs rw 0 0\nnone /sys"..., 1024) = 873 stat64("/", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 stat64("/sys", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 stat64("/proc", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0 stat64("/dev", {st_mode=S_IFDIR|0755, st_size=3540, ...}) = 0 close(4) = 0 munmap(0xb7845000, 4096) = 0 read(3, "", 512) = 0 write(2, "Cannot read device /dev/loop3.\n", 31Cannot read device /dev/loop3. ) = 31 close(3) = 0 munlockall() = 0 setpriority(PRIO_PROCESS, 0, 0) = 0 exit_group(-22) = ? 

（为了更好的粘贴 – > pastebin ）