Linux RAID & LVM

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LVM stuff

pvdisplay

vgdisplay

lvdisplay

Check status

cat /proc/mdstat

cat /etc/mdadm.conf

Make Raid 10

mdadm --create /dev/md30 --run --level=10 --chunk=4 --raid-devices=4 /dev/sda /dev/sdb /dev/sdd /dev/sdf

mdadm --examine /dev/md30
mdadm --detail /dev/md30

Make file system

mkfs.ext4 -O extent -b 4096 -E stride=128,stripe-width=128 -O ^has_journal /dev/md30
tune2fs -o journal_data_writeback /dev/md30

# append output to /etc/mdadm.conf
mdadm --detail --scan|grep d30 >>/etc/mdadm.conf

Add to /etc/fstab

echo "#">>/etc/fstab; echo "/dev/md30 /data ext4 discard,defaults,data=writeback 0 0" >>/etc/fstab

Create home directory and access

mkdir /data
mount /data

Add User and group

groupadd solr
useradd -d /home/solr -g solr -m -s /bin/bash -c "Solr Search" solr

Create solr directory & access

mkdir /data/solr;chown solr:solr /data/solr;chmod 770 /data/solr

passwd solr
devtech101solr#

Source – howto migarte to raid on live system

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