How to fix Diskfilter writes are not supported in Ubuntu Server 14.04?

Question

RAID

After installing Ubuntu Server 14.04 in RAID1, an error occurs on boot - Diskfilter writes are not supported.
Installed as in this manual - www.ubuntulinuxguide.com/software-raid-ubuntu-14-0... You
can boot only in the Recovery mode of grub recovery. After that, the system boots up normally.
How to fix download error?

Answer 1

The easiest (but not the most correct) way is to replace /etc/grub.d/10_linux
with a
More correct one is to wait for an official patch or apply an unofficial one, for example https://launchpadlibrarian.net/194269827/ubuntu-bu...

Answer 2

html {
        background: url(images/bg.jpg) no-repeat center center fixed;
        -webkit-background-size: cover;
        -moz-background-size: cover;
        -o-background-size: cover;
        background-size: cover;
}