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--- utils_raid_setup [2020/05/20 07:01]
xavier created
+++ utils_raid_setup [2020/05/20 07:36] (current)
xavier
@@ Line 8: / Line 8: @@
 Create RAID 5 array:\\
-''mdadm --create --verbose /dev/md0 --level=5 --raid-devices=3 /dev/sdb /dev/sdc /dev/sde''\\
+''# mdadm --create --verbose /dev/md0 --level=5 --raid-devices=3 /dev/sdb /dev/sdc /dev/sde''\\
+Check the array exists:\\
+''# cat /proc/mdstat''\\
+''# mdadm --detail /dev/md0''\\
+=> there is an initial phase of reconstruction when an array is created. It is supposedly functional during this time.\\
+Make the array a LVM Physical Volume (so it can be used by LVM):\\
+''# pvcreate /dev/md0''\\
+=> That takes time!\\
+Check result:\\
+''# pvs''\\
+''# pvdisplay''\\
+Define a LVM Volume Group consisting of the array (usually on several disks, but we already packed them with RAID so it's just one 'drive'):\\
+''# vgcreate vg_data /dev/md0''\\
+==> takes time as well!\\
+Check result:\\
+''# vgdisplay vg_data''\\
+Create LVM Volumes on the Volume Group:\\
+''# lvcreate -n vol_perso_data -L 350G vg_data''\\
+=> use -l instead to give % of available space\\
+Check result:\\
+''# lvs''\\
+''# lvdisplay''\\
+We can now use the new Volumes as we would use normal disks!\\
+Access is done through ''/dev/vg_data/vol_*''\\
+For example, to create ext4 partitions:\\
+''# mkfs.ext4 /dev/vg_data/vol_music''\\

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