无法挂载 “7.9 GB Filesystem”.

有个8G的U盘，格式化成exfat格式。插入电脑后点击盘符，弹出错误提示：

无法挂载 “7.9 GB Filesystem”.
Error mounting: mount exited with exit code : helper failed with:
ERROR: failed to open `/dev/sdb1' in read-write mode.
ERROR: failed to open `/dev/sdb1' in read-only mode.
.

google后发现找个：

First, make sure your user is in floppy, cdrom, plugdev and fuse groups.
Second, make sure your hard disk is not listed in /etc/fstab. If so, comment it out.

按此提示操作：

sudo vi /etc/fstab

看到最后有2行：

/dev/fd0 /media/floppy0 auto rw,user,noauto
/dev/sdb1 /media/usb0 auto rw,user,noauto 0 0

将最后一行注释掉即可！

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