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nightmorph 12/11/05 05:32:27 |
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Added: hb-install-initramfs.xml |
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Log: |
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add hb-install-initramfs.xml snippet |
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Revision Changes Path |
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1.1 xml/htdocs/doc/en/handbook/hb-install-initramfs.xml |
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file : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/handbook/hb-install-initramfs.xml?rev=1.1&view=markup |
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plain: http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/handbook/hb-install-initramfs.xml?rev=1.1&content-type=text/plain |
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Index: hb-install-initramfs.xml |
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=================================================================== |
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<?xml version='1.0' encoding="UTF-8"?> |
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<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/handbook/hb-install-initramfs.xml,v 1.1 2012/11/05 05:32:27 nightmorph Exp $ --> |
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<!DOCTYPE included SYSTEM "/dtd/guide.dtd"> |
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<included> |
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<version>1</version> |
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<date>2012-09-11</date> |
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<section id="initramfs"> |
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<title>(Optional) Building an Initramfs</title> |
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<body> |
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<p> |
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If you use a specific partition layout where important file system locations |
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(like <path>/usr</path> or <path>/var</path>) are on separate partitions, then |
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you will need to setup an initramfs so that this partition can be mounted before |
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it is needed. |
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</p> |
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<p> |
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Without an initramfs, you risk that the system will not boot up properly as the |
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tools that are responsible for mounting the file systems need information that |
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resides on those file systems. An initramfs will pull in the necessary files |
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into an archive which is used right after the kernel boots, but before the |
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control is handed over to the <c>init</c> tool. Scripts on the initramfs will |
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then make sure that the partitions are properly mounted before the system |
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continues booting. |
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</p> |
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<p> |
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To install an initramfs, install <c>genkernel</c> first, then have it |
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generate an initramfs for you. |
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</p> |
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<pre caption="Building an initramfs"> |
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# <i>emerge genkernel</i> |
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# <i>genkernel --install initramfs</i> |
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</pre> |
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<p> |
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If you need specific support in the initramfs, such as lvm or raid, add in the |
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appropriate options to genkernel. See <c>genkernel --help</c> for more |
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information, or the next example which enables support for LVM and software raid |
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(mdadm): |
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</p> |
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<pre caption="Building an initramfs with support for LVM and software raid"> |
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# <i>genkernel --lvm --mdadm --install initramfs</i> |
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</pre> |
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<p> |
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The initramfs will be stored in <path>/boot</path>. You can find the file by |
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simply listing the files starting with <path>initramfs</path>: |
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</p> |
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<pre caption="Checking the initramfs file name"> |
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# <i>ls /boot/initramfs*</i> |
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</pre> |
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<p> |
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Now continue with <uri link="#kernel_modules">Kernel Modules</uri>. |
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</p> |
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</body> |
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</section> |
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</included> |
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