Google Compute Engine safe_format_mount 问题 - 指定文件系统类型错误

Question

我一直在关注关于在 GCE 中使用 MongoDB 的教程

http://docs.mongodb.org/ecosystem/platforms/google-compute-engine/

我为 MongoDB 存储创建了一个单独的 SSD 磁盘并将其附加到实例，但是当我尝试安全挂载时

sudo /usr/share/google/safe_format_and_mount \ -m "mkfs.ext4 -F -o defaults,auto,noatime,noexec" /dev/sdb /data

我收到此错误：

safe_format_and_mount: Running: fsck.ext4 -a /dev/sdb
safe_format_and_mount: fsck.ext4: Bad magic number in super-block while trying to open /dev/sdb
safe_format_and_mount: /dev/sdb: 
safe_format_and_mount: The superblock could not be read or does not describe a correct ext2
safe_format_and_mount: filesystem.  If the device is valid and it really contains an ext2
safe_format_and_mount: filesystem (and not swap or ufs or something else), then the superblock
safe_format_and_mount: is corrupt, and you might try running e2fsck with an alternate superblock:
safe_format_and_mount:     e2fsck -b 8193 <device>
safe_format_and_mount: 
safe_format_and_mount: Fsck could not correct errors on /dev/sdb
safe_format_and_mount: Running: mount -o discard,defaults /dev/sdb /data
safe_format_and_mount: mount: you must specify the filesystem type
/usr/share/google/safe_format_and_mount: line 83: file: command not found
safe_format_and_mount: Running: mkfs.ext4 -F -o defaults,auto,noatime,noexec /dev/sdb
safe_format_and_mount: mke2fs 1.42.5 (29-Jul-2012)
safe_format_and_mount: Discarding device blocks: done                            
safe_format_and_mount: mkfs.ext4: unknown os - defaults,auto,noatime,noexec
safe_format_and_mount: Format of /dev/sdb failed.
safe_format_and_mount: Running: mount -o discard,defaults /dev/sdb /data
safe_format_and_mount: mount: you must specify the filesystem type
safe_format_and_mount: Tried everything we could, but could not mount /dev/sdb.

但是当我删除默认值、auto、noatime、noexec 并只使用 mkfs.ext4 -F 时它可以工作。

但是如果我设置了 MongoDB 的 dbpath，MongoDB 服务器将无法启动。如果我们运行 MongoDB，它会给出坏扇区。

那么如何挂载额外的磁盘并使用 GCE 创建一个合适的 ext4 文件系统？

Answer 1

您提供的链接中似乎有错字：

根据命令的帮助，正确的语法是：

/usr/share/google/safe_format_and_mount [-f fsck_cmd] [-m mkfs_cmd] [-o mount_opts] <device> <mountpoint>

如您所见，-m 参数用于指定对设备进行分区的选项，但"mkfs.ext4 -F -o defaults,auto,noatime,noexec" 混合了 mkfs 和 mount 参数。您需要先关闭双引号，然后您的命令应如下所示：

sudo /usr/share/google/safe_format_and_mount -m "mkfs.ext4 -F" -o defaults,auto,noatime,noexec /dev/sdb /data/