RHEL7.0启动时end_request I/O error及piix4_smbus错误提示处理

　　在VMWARE虚拟机下安装RHEL7.0，启动时有以下提示。经网上搜索，答复为floppy及piix4_smbus设备加载时找不到设备所致。

<a href="http://s3.51cto.com/wyfs02/M00/58/A4/wKiom1S2Nveh1RxeAAFJu7VL4TY402.jpg" target="_blank"></a>

　　解决办法如下：

floppy，在BIOS里禁用软驱，重启

piix4_smbus，先检查一下是否有加载piix4，如有把i2c_piix4加入黑名单，启动时不加载此模块

# lsmod | grep i2c_piix4

# vi  /etc/modprobe.d/blacklist.conf

blacklist i2c_piix4

其他的方法可参考

Added 

blacklist floppy

to 

/etc/modprobe.d/blacklist.conf

and rebooted

alias floppy off

/etc/modprobe.conf

disable the floppy kernel module by doing this:

echo "blacklist floppy" | sudo tee /etc/modprobe.d/nofloppy.conf

The only real solution is to disable the floppy driven in your vm's BIOS (as mentioned by gerald_clark)

官方文档的方法：

On some machines (mostly laptops with removable floppy drives), boot will pause while the (non-existant) floppy device is probed. A series of the following messages will appear:

This is caused by initrd's nash searching for filesystem labels on the floppy device. This problem can be avoided by adding <code>floppy.allowed_drive_mask=0</code> to the kernel boot options.

本文转自 lorysun 51CTO博客，原文链接:http://blog.51cto.com/lorysun/1604041