diff options
Diffstat (limited to 'chapter10')
| -rw-r--r-- | chapter10/grub.xml | 35 |
1 files changed, 19 insertions, 16 deletions
diff --git a/chapter10/grub.xml b/chapter10/grub.xml index 233902633..ef3cc8a43 100644 --- a/chapter10/grub.xml +++ b/chapter10/grub.xml @@ -19,7 +19,7 @@ <note> <para> If your system has UEFI support and you wish to boot LFS with UEFI, - you should skip this page, and config GRUB with UEFI support + you should skip this page, and configure GRUB with UEFI support using the instructions provided in <ulink url="&blfs-book;postlfs/grub-setup.html">the BLFS page</ulink>. </para> @@ -54,8 +54,8 @@ xorriso -as cdrecord -v dev=/dev/cdrw blank=as_needed grub-img.iso</userinput></ <para>GRUB uses its own naming structure for drives and partitions in the form of <emphasis>(hdn,m)</emphasis>, where <emphasis>n</emphasis> is the hard drive number and <emphasis>m</emphasis> is the partition - number. The hard drive number starts from zero, but the partition number - starts from one for normal partitions and five for extended partitions. + number. The hard drive numbers start from zero, but the partition numbers + start from one for normal partitions (from five for extended partitions). Note that this is different from earlier versions where both numbers started from zero. For example, partition <filename class="partition">sda1</filename> is <emphasis>(hd0,1)</emphasis> to @@ -83,12 +83,13 @@ xorriso -as cdrecord -v dev=/dev/cdrw blank=as_needed grub-img.iso</userinput></ files and access can be made from any booted system. If you choose to do this, you will need to mount the separate partition, move all files in the current <filename class="directory">/boot</filename> directory (e.g. the - linux kernel you just built in the previous section) to the new partition. + Linux kernel you just built in the previous section) to the new partition. You will then need to unmount the partition and remount it as <filename class="directory">/boot</filename>. If you do this, be sure to update <filename>/etc/fstab</filename>.</para> - <para>Using the current lfs partition will also work, but configuration + <para>Leaving <filename class="directory">>/boot</filename> on + the current LFS partition will also work, but configuration for multiple systems is more difficult.</para> <para>Using the above information, determine the appropriate @@ -161,26 +162,28 @@ EOF</userinput></screen> The change may cause boot failure because <filename>grub.cfg</filename> refers to some <quote>old</quote> designators. If you wish to avoid such a problem, you may use - the UUID of partition and filesystem instead of GRUB designator to - specify a partition. + the UUID of a partition and the UUID of a filesystem instead of a GRUB designator to + specify a device. Run <command>lsblk -o UUID,PARTUUID,PATH,MOUNTPOINT</command> to show - the UUID of your filesystems (in <literal>UUID</literal> column) and - partitions (in <literal>PARTUUID</literal> column). Then replace + the UUIDs of your filesystems (in the <literal>UUID</literal> column) and + partitions (in the <literal>PARTUUID</literal> column). Then replace <literal>set root=(hdx,y)</literal> with - <literal>search --set=root --fs-uuid <replaceable><UUID of the filesystem where the kernel is installed></replaceable></literal>, and replace + <literal>search --set=root --fs-uuid <replaceable><UUID of the filesystem + where the kernel is installed></replaceable></literal>, and replace <literal>root=/dev/sda2</literal> with - <literal>root=PARTUUID=<replaceable><UUID of the partition where LFS is built></replaceable></literal>.</para> - <para>Note that the UUID of a partition and the UUID of the filesystem - in this partition is completely different. Some online resources may + <literal>root=PARTUUID=<replaceable><UUID of the partition where LFS + is built></replaceable></literal>.</para> + <para>Note that the UUID of a partition is completely different from the + UUID of the filesystem in this partition. Some online resources may instruct you to use <literal>root=UUID=<replaceable><filesystem UUID></replaceable></literal> instead of <literal>root=PARTUUID=<replaceable><partition UUID></replaceable></literal>, - but doing so will require an initramfs which is beyond the scope of + but doing so will require an initramfs, which is beyond the scope of LFS.</para> <para>The name of the device node for a partition in - <filename class='directory'>/dev</filename> may also change (more - unlikely than GRUB designator change though). You can also replace + <filename class='directory'>/dev</filename> may also change (this is less + likely than a GRUB designator change). You can also replace paths to device nodes like <literal>/dev/sda1</literal> with <literal>PARTUUID=<replaceable><partition UUID></replaceable></literal>, in <filename>/etc/fstab</filename>, to avoid a potential boot failure |