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使用带有GCE的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＆＃34; mkfs.ext4 -F -o defaults，auto，noatime，noexec＆＃34; / 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时，auto，noatime，noexec并且只使用mkfs.ext4 -F就可以了。
但是如果我设置了MongoDB的dbpath，那么MongoDB服务器就无法启动。如果我们运行MongoDB，它会产生坏扇区。
那么如何安装额外的磁盘并使用GCE创建一个合适的ext4文件系统？
答案 0 :(得分：2)
看起来您提供的链接中存在拼写错误：
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>
正如您在那里看到的那样，-m参数用于指定分区设备的选项，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，并且命令应如下所示：
sudo /usr/share/google/safe_format_and_mount -m "mkfs.ext4 -F" -o defaults,auto,noatime,noexec /dev/sdb /data/