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--- zfsonroot [2007/04/25 21:38] – Link to ZFS AndrewThompson
+++ zfsonroot [2021/05/04 10:51] (current) – Fix 3 broken links. SashaVigole
@@ Line 1: / Line 1: @@
 You have an ad0 disk. Create one slice covering the entire disk:
-<code>
+''%%# fdisk -BI /dev/ad0%%''
-# fdisk -BI /dev/ad0
-</code>
 Initialize the BSDlabel:
-<code>
+''%%# bsdlabel -wB /dev/ad0s1%%''
-# bsdlabel -wB /dev/ad0s1
-</code>
 Edit your label and create a small (like 256MB-512MB) 'a' partition and
 use the rest for the 'd' partition:
-<code>
+''%%# bsdlabel -e /dev/ad0s1%%''
-# bsdlabel -e /dev/ad0s1
-</code>
-The 'd' partition will be used for ["ZFS"]:
+Something like this will create 512MB 'a' partition and allocate the rest for the 'd' partition:
-<code>
+''%%# /dev/ad0s1:%%''\\
-# zpool create tank ad0s1d
+''%%8 partitions:%%''\\
-</code>
+''%%#     size     offset  fstype%%''\\
+''%%  a:  1048576  16      unused%%''\\
+''%%  c:  *        0       unused%%''\\
+''%%  d:  *        *       unused%%''
+The 'd' partition will be used for [[ZFS]]:
+''%%# zpool create tank ad0s1d%%''
+Create bootdir directory where the boot file system will be mounted:
+''%%# mkdir /tank/bootdir%%''\\
+''%%# ln -s bootdir/boot /tank/boot%%''
 Create a UFS file system on /dev/ad0s1a and copy the /boot/ directory onto it:
-<code>
+''%%# newfs /dev/ad0s1a%%''\\
-# newfs /dev/ad0s1a
+''%%# mount /dev/ad0s1a /tank/bootdir%%''\\
-# mount /dev/ad0s1a /mnt/tmp
+''%%# cp -Rp /boot /tank/bootdir/%%''
-# cp -Rp /boot/* /mnt/tmp/
-</code>
-Note that there is no /boot/ directory on ad0s1a yet. This is one of the
+If the boot filesystem is already existing then make sure that /boot/zfs/zpool.cache still gets copied over.
-two possibilities. You now need to create a symlink:
-<code>
+Now don't forget to add zfs_load="YES" to /tank/boot/loader.conf.
-# cd /mnt/tmp
-# ln -s . boot
-</code>
-From what I checked our loader should handle symlinks just fine.
+Ok, you also need to tell your loader where your root file system is.
-This will allow us to mount /dev/ad0s1a on /boot directory and use it as
+You can do it by adding:
-usual.
-Another option is to:
+''%%vfs.root.mountfrom="zfs:tank"%%''
-<code>
+to /tank/boot/loader.conf or you can create /tank/bootdir/etc/fstab file
-# cp -Rp /boot /mnt/tmp/
+with one entry only:
-</code>
-and in the future mount /dev/ad0s1a on eg. /bootdisk and create symlink:
+''%%tank    /    zfs    rw    0    0%%''
-<code>
+On your [[ZFS]] file system, your /etc/fstab (/tank/etc/fstab) should contains the line above and:
-# ln -s bootdisk/boot /boot
-</code>
-All in all, you should see your kernel when you do:
+''%%/dev/ad0s1a    /bootdir    ufs    rw    1    1%%''
-<code>
+(and everything else, ie. your swap and other file systems)
-# ls -l /mnt/tmp/boot/kernel
-</code>
-Now don't forget to add zfs_load="YES" to /mnt/tmp/boot/loader.conf.
+At the end, set mount point to 'legacy' so [[ZFS]] won't try to mount it automatically:
-Ok, you also need to tell your loader where your root file system is.
+''%%# zfs set mountpoint=legacy tank%%''
-You can do it by adding:
-<code>
+==== troubleshooting ====
-vfs.root.mountfrom="zfs:tank"
+  * Ensure /boot/zfs/zpool.cache is up to date on the boot filesystem
-</code>
+  * Set ''%%vfs.zfs.debug=1%%'' in the loader to see more ZFS debug messages to the console
-to /mnt/tmp/boot/loader.conf or you can create /mnt/tmp/etc/fstab file
+==== Alternate way with GPT and full zfs (no UFS /boot) for 8.0-RELEASE ====
-with one entry only:
-<code>
+%%FreeBSD%% 8.0 and later have support for a full zfs-based system (i.e. without using an UFS /boot), so we can use the GPT partitioning scheme along with /boot/gptzfsboot. See lulf blog's entry:
-tank /       zfs     rw      0       0
-</code>
-On your ["ZFS"] file system, your /etc/fstab should contains the line above
+[[https://web.archive.org/web/20100824022058/http://lulf.geeknest.org:80/blog/freebsd/Setting_up_a_zfs-only_system/]]
-and:
-<code>
+or
-/dev/ad0s1a  /boot   ufs     rw      0       0
-</code>
-(and everything else, ie. your swap and other file systems)
+[[https://www.dan.me.uk/blog/2010/02/08/booting-from-zfs-raid056-in-freebsd-8-0-release/]]
+==== Automated installation with GPT and full zfs for 8.0-RELEASE ====
+You may try the mfsbsd SE amd64 ISO image with the "zfsinstall" script located at: http://mfsbsd.vx.sk/
+==== Automated install with GPT and Full ZFS with PXE ====
+PXE: [[https://web.archive.org/web/20180218111315/https://planet.freebsd.org/brd/2012/03/23/pxe-booting-freebsd-9/]]
+Install: [[https://web.archive.org/web/20180218111315/https://planet.freebsd.org/brd/2012/05/08/scripted-install-of-freebsd-9/]]
-At the end, set mount point to 'legacy' so ["ZFS"] won't try to mount it automatically:
+----
-<code>
+{{tag>Zfs}}
-# zfs set mountpoint=legacy tank
-</code>