grub-install安装grub时出错:/boot/grub/stage1 not read correctly.

在U盘上安装grub,之前是fat32的,格式化成exfat再安装grub,U盘设置文件为/dev/sdc4, 挂载于/media/c0f80392-62db-4156-a4f5-c64fc7515795/,但在运行grub-install时却出错了,如下:

[root@fsc feng]# grub-install –root-directory=/media/c0f80392-62db-4156-a4f5-c64fc7515795/ /dev/sdc4
The file /media/c0f80392-62db-4156-a4f5-c64fc7515795//boot/grub/stage1 not read correctly.

印象中以前都是这样安装grub的,检查没发现问题,于是google,说是/etc/fstab 里作过配置,刚才确实改过但没有重启机器,于是重启。再运行grub-install,还是照例出错,消息完全一样。于是继续google,啃英文文章,一时间没有找到方案。又尝试了N多其它方式:再次格式化U盘、直接拷/boot/grub 到U盘再grub-install等,都不行。

准备把U盘上分区重新删掉,重建分区再尝试。突然想到分区格式与分区表中不一致,使用“磁盘实用工具”查看时,该分区/dev/sdc4是w95 fat32(0x0b),删掉,再建ext2分区,设置为可启动(可以通过磁盘实用工具设置,或fdisk修改都可以),为/dev/sdc1,格式化为ext2,再次运行grub-install,成功

[root@fsc feng]# grub-install --root-directory=/media/287801d6-91aa-4563-a45e-d34073af2ff9 /dev/sdc1
Probing devices to guess BIOS drives. This may take a long time.
Installation finished. No error reported.
This is the contents of the device map /media/287801d6-91aa-4563-a45e-d34073af2ff9/boot/grub/device.map.
Check if this is correct or not. If any of the lines is incorrect,
fix it and re-run the script `grub-install'.

(fd0)    /dev/fd0
(hd0)    /dev/sda
(hd1)    /dev/sdb
(hd2)    /dev/sdc
[root@fsc feng]#



coded by nessus
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