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使用的grubinst-1.1-bin-w32.zip和grub4dos-0.4.4.zip，忘记输入sudo umount -l /isodevice，系统一直提示分区错误，然后直接把u盘拔了

重启以后，再用grub安装的时候出现 grubinst: extra parameters，而不是the mbr/bs has been successfully installer

请高手们帮忙想想办法，急！！

我是想给另外一个本装ubuntu，现在那个本上还没有系统

没有unmount isodevice就装系统，一直报错说分区有问题，我以为是u盘没弄好，就把u盘用unetbootin重新做了,但是起不来

之后在网上查是要unmount isodevice，现在想再用grub做个u盘就一直出现grubinst: extra parameters

我用的是grubinst-1.1-bin-w32, 点击grubinst_gui.exe以后，选择安装，成功会提示the mbr/bs has been successfully installer

我现在提示grubinst: extra parameters

不知道是不是因为unetbootin把u盘做成光盘格式了？
sudo fdisk -lu看看
用diskgen把u盘分区删除，重新分区试试。

Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x957c3ffa

Device Boot Start End Blocks Id System
/dev/sda1 * 2048 206847 102400 7 HPFS/NTFS
Partition 1 does not end on cylinder boundary.
/dev/sda2 206848 102815999 51304576 7 HPFS/NTFS
/dev/sda3 102816062 976768064 436976001+ 5 Extended
/dev/sda5 102816064 836825849 367004893 7 HPFS/NTFS
/dev/sda6 836827136 837117951 145408 83 Linux
/dev/sda7 837120000 853118975 7999488 82 Linux swap / Solaris
/dev/sda8 853121024 873119743 9999360 83 Linux
/dev/sda9 873121792 893120511 9999360 83 Linux
/dev/sda10 893122560 976771071 41824256 83 Linux

Disk /dev/sdb: 8000 MB, 8000110592 bytes
255 heads, 63 sectors/track, 972 cylinders, total 15625216 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xcad4ebea

Device Boot Start End Blocks Id System
/dev/sdb4 * 63 15625215 7812576+ b W95 FAT32
Partition 4 has different physical/logical endings:
phys=(971, 254, 63) logical=(972, 159, 19)

怎么看是不是光盘格式的
我去试试diskgen

用diskgen删除分区，重建试试。

删除了分区,又重新建了个
装的grub的时候还是提示grubinst: Extra parameters

不清楚
找smallapple看看。