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Migrate upgrading part from the guide to the wiki.

    1: # Upgrading NetBSD
    3: This chapter describes the binary upgrade of a NetBSD system. There are a
    4: variety of alternatives to perform this procedure, and the following sections
    5: will guide you through them.
    7: ## Using sysinst
    9: ### Overview
   11: To do the upgrade, you must have some form of bootable media (CD-ROM, USB
   12: drive, network, etc.) available and at least the base and kern distribution
   13: sets. Since files already installed on the system are overwritten in place,
   14: you only need additional free space for files which weren't previously
   15: installed or to account for growth of the sets between releases. Usually this
   16: is not more than a few megabytes.
   18: ### Note
   20: Since upgrading involves replacing the kernel, boot blocks, and most of the
   21: system binaries, it has the potential to cause data loss. Before beginning,
   22: you are strongly advised to back up any important data on the NetBSD partition
   23: or on any other partitions on your disk, most importantly `/etc`.
   25: The upgrade procedure is similar to an installation, but without the hard disk
   26: partitioning. sysinst will attempt to merge the settings stored in your `/etc`
   27: directory with the new version of NetBSD. Also, file systems are checked
   28: before unpacking the sets. Fetching the binary sets is done in the same manner
   29: as in the installation procedure.
   31: ### The INSTALL document
   33: Before doing an upgrade it is essential to read the release information and
   34: upgrading notes in one of the `INSTALL` files: this is the official
   35: description of the upgrade procedure, with platform specific information and
   36: important details. It can be found in the root directory of the NetBSD release
   37: (on the install CD or on the FTP server).
   39: It is advisable to print the INSTALL document out. It is available in four
   40: formats: `.txt`, `.ps`, `.more`, and `.html`.
   42: ### Performing the upgrade
   44: The following section provides an overview of the binary upgrade process. Most
   45: of the following sysinst dialogs are similar to those of the installation
   46: process. More verbose descriptions and explanations of the dialogs are
   47: available in [[Example installation|guide/exinst]].
   49: After selecting the installation language and the keyboard type, the main menu
   50: appears. Choosing option `b: Upgrade NetBSD on a hard disk` will start the the
   51: upgrade process.
   53: ![Starting the upgrade](../install-5.0/up-main.png)
   55: This dialog will request permission to continue with the upgrade. At this point
   56: nothing has been changed yet and the upgrade can still be cancelled. This is a
   57: good time to ask yourself whether you have made a backup, and if you know for
   58: certain that you will be able to restore from it.
   60: ![Continuing the upgrade](../install-5.0/up-confirm.png)
   62: After choosing to continue with `Yes`, the next dialog will ask you to specify
   63: the hard disk with the NetBSD system that shall be upgraded. If more than one
   64: disk is available a list of the disks will be displayed.
   66: ![Choosing the hard drive](../install-5.0/up-select-disc.png)
   68: The system used for the example has only one hard disk available: `wd0`.
   70: The following dialog provides a menu to choose the installation type. The
   71: choices are `Full installation`, `Minimal installation`, or `Custom
   72: installation`.
   74: ![Choosing the distribution filesets](../install-5.0/inst-install-type.png)
   76: At this point, sysinst will perform a check of the file system to ensure its
   77: integrity.
   79: ![File system check](../install-5.0/up-fsck.png)
   81: The next step is to choose which type of bootblocks to install.
   83: ![Choosing bootblocks](../install-5.0/inst-bootblocks.png)
   85: The next dialog will ask how much information should be displayed during the
   86: extraction of the distribution sets.
   88: ![Upgrade process - verbosity level](../install-5.0/inst-verbosity.png)
   90: The following dialog asks for the install method of choice and provides a list
   91: of possible options. The install medium contains the new NetBSD distribution
   92: sets. You will be prompted for different information depending on which option
   93: you choose. For example, a CD-ROM or DVD install requires you to specify which
   94: device to use and which directory the sets are in, while an FTP install
   95: requires you to configure your network and specify the hostname of an FTP
   96: server. More details can be found in
   97: [[Choosing the installation media|guide/exinst#choosing_the_installation_media]].
   99: ![Install medium](../install-5.0/inst-medium.png)
  101: sysinst will now unpack the distribution sets, replacing your old binaries.
  102: After unpacking these sets, it runs the postinstall script to clean up various
  103: things. If no problems occur, you are done. If postinstall produces errors, you
  104: will have to manually resolve the issues it brings up. See postinstall's man
  105: page for more information. You should also read the remarks in `INSTALL` about
  106: upgrading, as specific compatibility issues are documented there.
  108: ![Upgrade complete](../install-5.0/up-complete.png)
  110: When you are back at the main menu, remove the boot medium (if applicable) and
  111: reboot. Have fun with your new version of NetBSD!
  113: ## Using sysupgrade
  115: The sysupgrade utility (currently found in `pkgsrc/sysutils/sysupgrade`) allows
  116: you to upgrade a running system to a newer binary release.
  118: ### Note
  120: Please be aware that, as of August 2012, sysupgrade is a farily new tool and is
  121: still undergoing field testing. Use with care. In particular, upgrades across
  122: major binary releases might not work properly yet because of the lack of a
  123: reboot between the kernel installation and the unpacking of the sets. That said,
  124: you may find this tool very convenient to track NetBSD-current or stable NetBSD
  125: branches.
  127: One of the benefits of sysupgrade is that it is an integrated and
  128: almost-unattended solution: the tool fetches the new kernel and distribution
  129: sets from remote sites if you desire and performs the upgrade without user
  130: intervention until new changes to the configuration files need to be merged.
  132: Let's assume you are running NetBSD/amd64 6.0 and you wish to upgrade to NetBSD
  133: 6.1. The procedure to do so would be to run the following command:
  135:     # sysupgrade auto
  138: And that's all that it takes. This will proceed to download the kernel and
  139: sets appropriate for your machine, unpack them and assist you in merging new
  140: configuration changes. Do not forget to reboot afterwards.
  142: For more details, please see the included sysupgrade(8) manual page and the
  143: `/usr/pkg/etc/sysupgrade.conf` configuration file.

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