GUID Booting Guide - Revision history

Palica at 07:55, 18 November 2012

2012-11-18T07:55:55Z

Genium: /* Configuring The Kernel */ source Linux/x86_64 3.3.1 Kernel Configuration

2012-04-14T19:56:43Z

‎Configuring The Kernel: source Linux/x86_64 3.3.1 Kernel Configuration

Oleg at 16:01, 29 January 2012

2012-01-29T16:01:13Z

Drobbins: /* Getting Started */

2011-03-04T17:53:15Z

‎Getting Started

Drobbins: /* GPT Technology Overview */

2011-03-04T17:52:43Z

‎GPT Technology Overview

Drobbins at 17:50, 4 March 2011

2011-03-04T17:50:19Z

Drobbins: restore simplicity of original paragraph, preserve 404's changes, corrections.

2011-03-04T17:50:03Z

restore simplicity of original paragraph, preserve 404's changes, corrections.

404 Error: /* Introduction */

2011-03-04T13:41:07Z

‎Introduction

404 Error: /* Introduction */

2011-03-04T13:39:57Z

‎Introduction

404 Error: /* Introduction */

2011-03-04T13:39:18Z

‎Introduction

← Older revision		Revision as of 07:55, 18 November 2012
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	For more information on all the options available for <tt>/etc/boot.conf</tt>, please consult the [[Boot-Update]] guide.		For more information on all the options available for <tt>/etc/boot.conf</tt>, please consult the [[Boot-Update]] guide.
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		+	[[Category:Funtoo features]]

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 == Configuring The Kernel ==
-Your kernel will need a couple of extra GPT-related options enabled in order for it to make sense of your GPT partitions and find your filesystems. These options can be found under <tt>File Systems ---&gt; Partition Types</tt>:
+Your kernel will need a couple of extra GPT-related options enabled in order for it to make sense of your GPT partitions and find your filesystems. These options can be found under <tt>Enable the block layer ---&gt; Partition Types</tt>:
 <pre>[*] Advanced Partition Selection (PARTITION_ADVANCED)

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 At this point, you have two choices as to what partitioning tool to use. You can use either <tt>gdisk</tt> or <tt>parted</tt>. <tt>gdisk</tt> is a very nice <tt>fdisk</tt>-like partitioning tool that supports GPT partitioning. It is rather new software but seems to work quite well. The other tool you can use, GNU <tt>parted</tt>, has been around for a while and is more mature, but is harder to use.
-We'll take a look at how to create partitions using <tt>gdisk</tt>.
+We'll take a look at how to create partitions using <tt>gdisk</tt>. Alternatively, <code>cgdisk</code>, curses-based gdisk for users familiar with cfdisk or <code>sgdisk</code>, command-line tool can be used for creating and managing GPT partitions.
 == Partitioning Using Gdisk ==

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 At this point, you have two choices as to what partitioning tool to use. You can use either <tt>gdisk</tt> or <tt>parted</tt>. <tt>gdisk</tt> is a very nice <tt>fdisk</tt>-like partitioning tool that supports GPT partitioning. It is rather new software but seems to work quite well. The other tool you can use, GNU <tt>parted</tt>, has been around for a while and is more mature, but is harder to use.
-We'll take a look at how to create partitions using <tt>gdisk</tt> first.
+We'll take a look at how to create partitions using <tt>gdisk</tt>.
 == Partitioning Using Gdisk ==

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 This section contains a technical overview of GPT technology.
-GUID partition tables support up to 512 partitions. GPT data structures are primarily stored in the first sectors of the drive with a secondary copy of those stored at the end of the drive, which leaves you a chance to recover your partitioning scheme in case of alteration would occur.
+GUID partition tables support up to 512 partitions. GPT data structures are stored in the first sectors of the drive with a secondary copy stored at the end of the drive. This allows the partitioning scheme of your disk to be recovered in situations where the primary partition table has been corrupted.
 For compatibility with legacy partitioning tools, GPT partitioning tools typically rewrite the MBR partition table (generally located in the first sector of the disk) in a way those tools will interpret it like ''"This disk has only one partition (of an unknown type) covering the whole disk".''

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 It is possible to convert an existing MBR-partitioned disk to GPT format using the <tt>gdisk</tt> command. Please carefully read the <tt>gdisk</tt> man page before using this capability, as it is potentially dangerous, particularly if you are performing it on your boot disk.
-{{ fancyimportant| Funtoo Linux fully supports GPT on x86-32bit and x86-64-bit systems. GPT is supported on SPARC systems, but currently only for non-boot disks.
+{{ fancyimportant|Funtoo Linux fully supports GPT on x86-32bit and x86-64-bit systems. GPT is supported on SPARC systems, but currently only for non-boot disks.
 }}

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 == Introduction ==
-GPT, which stands for GUID Partition Table, is a disk partitioning scheme that was introduced by Intel for Itanium architecture systems, as part of EFI, the Extensible Firmware Interface and supports up to 512 partitions. GPT uses a totally new data structure and does not rely on the legacy and so well known partition table located in the first sector of the disk. Instead, GPT data structures are primarily stored in the firsts sectors of the drive with a secondary copy of those stored at the end of the drive which leaves you a chance to recover your partitioning scheme in case of alteration would occur. To prevent legacy partitioning software alter the structures, GPT also rewrites the legacy partition table (generally located in the first sector of the disk) in a way those tools will interpret it like ''"This disk has only one partition (of an unknown type) covering the whole disk".''
+GPT, which stands for GUID Partition Table, is a disk partitioning scheme that was introduced by Intel for Itanium architecture systems, as part of EFI, the Extensible Firmware Interface. While you are probably not using an Itanium architecture computer, and you are likely using a BIOS-based rather than an EFI-based system, you still may want to use GPT partitioning. Why? Because the standard MBR-based partitioning scheme only supports system disks that are less than 2TiB in size. On modern systems, especially systems with hardware RAID logical volumes, it is very easy to go beyond the 2TiB limit. GUID partition tables support disks that are larger than 2TiB in size.
-{{ fancyimportant|* You can't convert a disk to GPT, therefore you must delete all partitions, create the GPT structures and recreate the partitions.
+=== GPT Technology Overview ===
-*Funtoo SPARC users: '''Do not use GPT on the disk used to boot the system''' because GPT rewrites the first sector of the drive thus killing the Sun disklabel on it (OpenBoot will fail to recognize the drive as a valid one).
-}}
-While you are probably not using an Itanium architecture computer, and you are likely using a BIOS-based rather than an EFI-based system, you still may want to use GPT partitioning. Why? Because the standard MBR-based partitioning scheme only supports system disks that are less than 2TiB in size. On modern systems, especially systems with hardware RAID logical volumes, it is very easy to go beyond the 2TiB limit. GUID partition tables support disks that are larger than 2TiB in size.
+This section contains a technical overview of GPT technology.
 === Booting GPT ===