pvdisplay -v
pvs -v
pvs -a

pvs attributes are:
1. (a)llocatable
2. e(x)ported

## do not allow allocation of extents on this drive
pvchange -x n /dev/sdb1

Common Attributes that you may want to use:

--addtag add a tag
-x allowed to allocate extents
-u change the uuid

vgcreate VolData00 /dev/sdb1 /dev/sdb2 /dev/sdb3
vgcreate VolData00 /dev/sdb[123]

## Use 32MB extent size
vgcreate VolData00 -s 32 /dev/sdb1

Common Attributes that you may want to use:

-l  maximum logical volumes
-p maximum physical volumes
-s physical extent size (default is 4MB)
-A autobackup

lvdisplay -v
lvdisplay --maps      display mirror volumes

lvs -v
lvs -a -o +devices

## lvs commands for mirror volumes
lvs -a -o +devices
lvs -a -o +seg_pe_ranges --segments

lvs attributes are:
1. volume type: (m)irrored, (M)irrored without initail sync, (o)rigin, (p)vmove, (s)napshot, invalid (S)napshot, (v)irtual, mirror (i)mage
                      mirror (I)mage out-of-sync, under (c)onversion
2. permissions: (w)rite, (r)ead-only
3. allocation policy - (c)ontiguous, c(l)ing, (n)ormal, (a)nywhere, (i)nherited
4. fixed (m)inor
5. state: (a)ctive, (s)uspended, (I)nvalid snapshot, invalid (S)uspended snapshot, mapped (d)evice present with-out tables,
             mapped device present with (i)nactive table
6. device (o)pen (mounted in other words)

## plain old volume
lvcreate -L 10M VolData00

## plain old volume but with a specific name web01
lvcreate -L 10M -n web01 VolData00

## plain old volume but on a specific disk
lvcreate -L 10M VolData00 /dev/sdb1

## a striped volume called lvol1 (note the captial i for the stripe size)
lvcreate -i 3 -I 32 -L 24M -n lvol1 vg01

## Mirrored volume
lvcreate -L 10M -m1 -n data01 vg01

## Mirrored volume without a mirror log file
lvcreate -L 10M -m1 --mirrorlog core -n data01 vg01

Common Attributes that you may want to use:

-L size of the volume [kKmMgGtT]
-l number of extents
-C contiguous [y|n]
-i stripes
-I stripe size
-m mirrors
--mirrorlog
-n volume name

lvextend -L 20M /dev/VolData00/vol01

Common Attributes that you may want to use:

-L size of the volume [kKmMgGtT]
-l number of extents
-C contiguous [y|n]
-i stripes
-I stripe size

Note: you can extend a ext2/ext3 filesystem using the "resize2fs" or "fsadm" command

fsadm resize /dev/VolData01/data01
resize2fs -p /dev/mapper/VolData01-data01 [size]

The -p option displays bars of progress while extendingthe filesystem

lvreduce -L 5M /dev/VolData00/vol01
lvresize -L 5M /dev/VolData00/vol01

Note: rounding will occur when extending and reducing volumes to the next extent (4MB by default), you can use resize2fs or fsadm to shrink the filesystem

fsadm resize /dev/VolData01/data01 [size]
resize2fs -p /dev/mapper/VolData01-data01 [size]

lvchange -a n /dev/VolData00/vol01

Common Attributes that you may want to use:

-a availability
-C contiguous [y|n]

# attempt to bring the volume group online but you get UUID conflict errors make note of the UUID number
vgchange -a y VolData00
vgchange -a n VolData00

## sometimes it my only be a logical volume problem
lvchange -a y /dev/VolData00/web02
lvchange -a n /dev/Voldata00/web02

## replace the disk physically, remember to partion it with type 8e
fdisk /dev/sdb
........

# after replacing the faulty drive the disk must have the previuos UUID number or you can get it from /etc/lvm directory
pvcreate --uuid <previous UUID number taken from above command> /dev/sdb2

# Restore the LVM configation
vgcfgrestore VolData00

# attempt to bring the volume group online or logical volume
vgchange -a y VolData00
lvchange -a y /dev/VolData00/web02

# file system check
e2fsck /dev/VolData00/data01

Note: if you have backed the volume group configuration you can obtain the UUID number in the backup file by default located in /etc/lvm/backup or running "pvs -v"