LVM - Revision history

Support at 01:08, 22 October 2017

2017-10-22T01:08:00Z

Support at 00:32, 22 October 2017

2017-10-22T00:32:45Z

Support at 23:57, 21 October 2017

2017-10-21T23:57:59Z

Support: /* Adding new drives (existing space NOT available) */

2017-05-09T20:13:47Z

‎Adding new drives (existing space NOT available)

Support at 20:12, 9 May 2017

2017-05-09T20:12:20Z

Support: Created page with "(all of these apply to both VM and physical systems) === Resizing existing mountpoints (adding more space) === 1. if this is Enterprise 3 or older, umount partition (not nee..."

2017-05-09T20:09:06Z

Created page with "(all of these apply to both VM and physical systems) === Resizing existing mountpoints (adding more space) === 1. if this is Enterprise 3 or older, umount partition (not nee..."

New page

(all of these apply to both VM and physical systems)

=== Resizing existing mountpoints (adding more space) ===
1. if this is Enterprise 3 or older, umount partition (not needed under Ent 4 and newer)
# umount /arsystem

2. check free space available
# vgdisplay pri | grep "Free PE"
Free PE / Size 1413 / 44.16 GB

3. add desired space to partition
Ent 7
# lvextend -l +1413 -r /dev/pri/arsystem
OR
# lvextend -l +1413 /dev/pri/arsystem
# xfs_growfs /dev/pri/arsystem

Ent 5/6
# lvextend -l +1413 -r /dev/pri/arsystem
OR
# lvextend -l +1413 /dev/pri/arsystem
# resize2fs /dev/pri/arsystem

Ent 4 only (e2fsadm not avail on Ent 4);
# lvextend -l +1413 /dev/pri/arsystem
# ext2online /dev/pri/arsystem

Ent 3 only;
# e2fsadm -l +1413 /dev/pri/arsystem
Note: if you run this command and the fsck gives errors, fix the errors by running fsck manually, and then run the command again (it will not do it's resizing until fsck runs cleanly)

4. if this is Ent 3 or older, mount partition (not needed under Ent 4 and newer)
# mount /arsystem

=== Resizing existing mountpoints (reducing space) ===
1. if this is Ent 3 or older, umount partition (not needed under Ent 4 and newer)
# umount /arsystem

2. check free space available
# df -h | grep arsystem
/dev/mapper/pri-arsystem 199G 13M 198G 1% /arsystem

3. set desired space of partition
Ent 7
NOTE: if reducing xfs, backup your data, you have to recreate the filesystem, all will be lost!
# lvreduce -L 10G /dev/pri/arsystem
# mkfs -t xfs /dev/pri/arsystem

Ent 5/6
# lvreduce -L 10G /dev/pri/arsystem
# resize2fs /dev/pri/arsystem

Ent 4 only (e2fsadm not avail on Ent 4);
# lvreduce -L 10G /dev/pri/arsystem
# ext2online /dev/pri/arsystem

Ent 3 only;
# e2fsadm -L 10G /dev/pri/arsystem
Note: if you run this command and the fsck gives errors, fix the errors by running fsck manually, and then run the command again (it will not do it's resizing until fsck runs cleanly)

4. if this is Ent 3 or older, mount partition (not needed under Ent 4 and newer)
# mount /arsystem

=== Resizing SWAP ===
1. unmount swap (the one you want to resize - 'usually' there is only one)
# swapoff /dev/pri/swap

2. check free space, then add desired space to partition
# vgdisplay pri | grep "Free PE"
Free PE / Size 1413 / 44.16 GB
# lvextend -L +4g /dev/pri/swap

3. rebuild swap filesystem (there is no swap resize command)
# mkswap /dev/pri/swap

4. re-enable swap
# swapon /dev/pri/swap

5. verify using 'free' command that new size is in use
# free | grep Swap
Swap: 4192924 0 4192924

=== Adding partitions (existing space available) ===
1. create new logical volume;
# lvcreate -L 8G -n arsystem pri
OR;
to use all of the remaining space, check "Free PE" from vgdisplay, then use -l option instead of -L, example;
# vgdisplay pri | grep "Free PE"
Free PE / Size 1413 / 44.16 GB
# lvcreate -l 1413 -n arsystem pri

2. create filesystem;
Ent 7
# mkfs -t xfs /dev/pri/arsystem
Ent 6
# mkfs -t ext4 /dev/pri/arsystem
Ent 5 or earlier
# mkfs -t ext3 /dev/pri/arsystem

3. make mountpoint;
# mkdir /arsystem

4. add to fstab;
# vi /etc/fstab

5. test fstab entry by mounting w/fstab info;
# mount /arsystem

=== Removing partitions (for re-allocating/freeing up space) ===
1. umount partition
# umount /u001

2. remove LVM volume
# lvremove /dev/pri/u001

3. remove from fstab
# vi /etc/fstab

=== Adding new drives (existing space NOT available) ===
(this step assumes you added a new drive, whether physical for a physical sys, or virtual for a virtual sys)
1. create a single partition as type LVM (8e) for the whole drive
# fdisk /dev/sdb
Note: if your new drive was added to a 'live' system, and it is not showing under 'fdisk -l', you can rescan with:
echo "- - -" > /sys/class/scsi_host/host0/scan
But may also need to rescan all SCSI host devices
echo "- - -" > /sys/class/scsi_host/host1/scan
echo "- - -" > /sys/class/scsi_host/host2/scan

2. initialize new drive as LVM
# pvcreate /dev/sdb1

3. add new drive to existing LVM volume
# vgextend pri /dev/sdb1
OR
# vgcreate sec /dev/sdb1

=== Renaming Volume Group & Logical Volume names ===
*Rename Logical Volume (partition name)*
# lvrename /dev/pri/HomeVol home
(make sure to update fstab with the change)

*Rename Volume Group*
# vgrename VolGroup00 pri
(make sure to update fstab with the change)

@@ Line 119: / Line 119: @@
 === Snapshot Partitions ===
 create a snapshot of an existing LVM partition
-  # lvcreate -L1G -s -n remedyss /dev/pri/remedy
+  # lvcreate -L 1G -s -n remedyss /dev/pri/remedy
 Note: this can now be mounted and used to back up this frozen copy of your filesystem. To remove when done, follow Removing Partitions (above)

← Older revision		Revision as of 00:32, 22 October 2017
Line 122:		Line 122:
	Note: this can now be mounted and used to back up this frozen copy of your filesystem. To remove when done, follow Removing Partitions (above)		Note: this can now be mounted and used to back up this frozen copy of your filesystem. To remove when done, follow Removing Partitions (above)

		+	=== Restore Snapshots ===
		+	1. unmount the partition to make sure nothing else can write to it while restoring
		+	# umount /dev/pri/remedy
		+	2. merge the snapshot back into the original partition
		+	# lvconvert --merge /dev/pri/remedyss

	=== Adding New Drives (existing space NOT available) ===		=== Adding New Drives (existing space NOT available) ===

@@ Line 1: / Line 1: @@
 (all of these apply to both VM and physical systems)
-===  Resizing existing mountpoints (adding more space) ===
+=== Resizing Existing Mountpoints (adding more space) ===
 . if this is Enterprise 3 or older, umount partition (not needed under Ent 4 and newer)
-  # umount /arsystem
+  # umount /home/arsystem
 . check free space available
@@ Line 33: / Line 33: @@
   # mount /arsystem
-===  Resizing existing mountpoints (reducing space) ===
+=== Resizing Existing Mountpoints (reducing space) ===
 . if this is Ent 3 or older, umount partition (not needed under Ent 4 and newer)
-  # umount /arsystem
+  # umount /home/arsystem
 . check free space available
   # df -h | grep arsystem
-  /dev/mapper/pri-arsystem     199G   13M   198G  1% /arsystem
+  /dev/mapper/pri-arsystem     199G   13M   198G  1% /home/arsystem
 . set desired space of partition
@@ Line 60: / Line 60: @@
 . if this is Ent 3 or older, mount partition (not needed under Ent 4 and newer)
-  # mount /arsystem
+  # mount /home/arsystem
-===  Resizing SWAP ===
+=== Resizing SWAP ===
 . unmount swap (the one you want to resize - 'usually' there is only one)
   # swapoff /dev/pri/swap
@@ Line 81: / Line 81: @@
   Swap:      4192924          0    4192924
-===  Adding partitions (existing space available) ===
+=== Adding Partitions (existing space available) ===
 . create new logical volume;
   # lvcreate -L 8G -n arsystem pri
@@ Line 99: / Line 99: @@
 . make mountpoint;
-  # mkdir /arsystem
+  # mkdir /home/arsystem
 . add to fstab;
@@ Line 105: / Line 105: @@
 . test fstab entry by mounting w/fstab info;
-  # mount /arsystem
+  # mount /home/arsystem
-===  Removing partitions (for re-allocating/freeing up space) ===
+=== Removing Partitions (for re-allocating/freeing up space) ===
 . umount partition
   # umount /u001
@@ Line 117: / Line 117: @@
   # vi /etc/fstab
-===  Adding new drives (existing space NOT available) ===
+=== Snapshot Partitions ===
 (this step assumes you added a new drive, whether physical for a physical sys, or virtual for a virtual sys)
 . create a single partition as type LVM (8e) for the whole drive
@@ Line 132: / Line 138: @@
   # vgcreate sec /dev/sdb1
-===  Renaming Volume Group & Logical Volume names ===
+=== Renaming Volume Group & Logical Volume Names ===
 *Rename Logical Volume (partition name)*
   # lvrename /dev/pri/HomeVol home

@@ Line 121: / Line 121: @@
 . create a single partition as type LVM (8e) for the whole drive
   # fdisk /dev/sdb
-Note: if your new drive was added to a 'live' system, and it is not showing under 'fdisk -l', you can rescan with (may need to do this with more than host0, i.e. host0, host1, etc.):
+Note: if the new drive was added to a 'live' system, and it is not showing under 'fdisk -l', rescan with (may need to do this with more than host0, i.e. host0, host1, etc.):
   echo "- - -" > /sys/class/scsi_host/host0/scan