====== Slackware Raid Installation ======

This will describe how to install slackware 12 onto a raid.



===== procedure =====

  - boot
  - pick hugesmp.s kernel or whatever
  - partiton one drive (I'm using ''/dev/hda'' and ''/dev/hdc'')
  - run:\\ <code># sfdisk -d /dev/hda |sfdisk /dev/hdc
# fdisk /dev/hdc
...
you should see the same partition table as you setup on /dev/hda.
If you do, type "w" and press enter (to write the table and exit fdisk)
</code>
  - setup the raids - ''/dev/md0'' will be ''/boot'', ''/dev/md1'' will be ''swap'' (and thus striped), ''/dev/md2'' will be ''/'', and ''/dev/md3'' will be an lvm partion:\\ <code># mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/hd[ac]1
# mdadm --create /dev/md1 --level=0 --raid-devices=2 /dev/hd[ac]2
# mdadm --create /dev/md2 --level=1 --raid-devices=2 /dev/hd[ac]3
# mdadm --create /dev/md3 --level=1 --raid-devices=2 /dev/hd[ac]4
</code>
  - setup the lvm physical volume:\\ <code># pvcreate /dev/md3</code>
  - setup the lvm volume group:\\ <code># vgcreate raid1_vg0 /dev/md3</code>
  - setup the lvm logical volumes:\\ <code># lvcreate -L8G -nslack_usr raid1_vg0
# lvcreate -L6G -nslack_var raid1_vg0
# lvcreate -L6G -nslack_home raid1_vg0
</code>
  - initialize the lvm groups:\\ <code># vgchange -a y raid1_vg0</code>
  - setup the swap:\\ <code># mkswap /dev/md1
# swapon /dev/md1
</code>
  - the slackware setup will detect the volume groups after running the ''vgchange -a y raid1_vg0'' command
  - run ''setup'' - don't bother activating swap - it has already been done above
  - after your setup completes, create ''mdadm.conf'' (It is not required by mdadm to work, but is useful for keeping track of arrays and member disks):\\ <code># mdadm --detail --scan >> /mnt/etc/mdadm.conf</code>
  - add swap mount point to /mnt/etc/fstab:
    * <code>/dev/raid0_vg0/swap swap swap defaults 0 0</code>
  - run vgscan to create /etc/lvm/backup, which is checked by the init scripts in order to enable LVM (for details see /etc/rc.d/rc.S).  We have to do this in our "new" installation (located in ''/mnt''):\\ <code># chroot /mnt
# vgscan -v</code>
  - exit chroot
  - reboot!

===== references =====

  * http://pumpump.blogspot.com/2007/07/installing-slackware-12-on-linux.html

== 

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{{tag>:linux :linux:slackware :linux:server}}