今天用U盤安裝HREL6.4，用U盤引導，網路安裝，結果不料，一不小心吧引導卻安裝到了U盤上。

第一步，用U盤引導，重新安裝grub

[[email protected] ~]# grub-install --root-directory=/ --no-floppy /dev/sda
/dev/sda does not have any corresponding BIOS drive.

此處說沒有任何裝置

第二步，重新檢測

[[email protected] ~]# grub-install --recheck /dev/sda
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 /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

第三步，再次安裝grub

[[email protected] ~]# grub-install --root-directory=/ --no-floppy /dev/sda
Installation finished. No error reported.
This is the contents of the device map //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

第四步，修改grub.conf

# vi /etc/grub.conf

default=0
timeout=1
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.32-358.el6.x86_64)
        root (hd0,0)
        kernel /vmlinuz-2.6.32-358.el6.x86_64 ro root=UUID=d9de1295-9ef9-446d-b4ab-722137370564 rd_NO_LUKS  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_MD crashkernel=auto LANG=zh_CN.UTF-8 rd_NO_LVM rd_NO_DM rhgb quiet
        initrd /initramfs-2.6.32-358.el6.x86_64.img

正常重啟

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迷途小運維隨筆

作者：john

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