11-08-2008
ioscan will tell you what disks are connected and diskinfo what they are..
what do you call disk usage? Are you in LVM?
If so are you wondering if you have some spare unused lv extents because there is difference between disk size and what you see with bdf?
Many cases:
1 - Swap: will not show up with bdf, df, du, but with swapinfo
2 - Unmounted FS or unused FS...
3 - Mirroring...
4 - Yes not all disk space is used
in this case free PP can be seen with vgdisplay /dev/<VGname>
man vgdisplay lvdisplay pvdisplay swapinfo
All the best
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LEARN ABOUT LINUX
vgdisplay
VGDISPLAY(8) System Manager's Manual VGDISPLAY(8)
NAME
vgdisplay - display attributes of volume groups
SYNOPSIS
vgdisplay [-A|--activevolumegroups] [-c|--colon|-s|--short|-v|--verbose] [-d|--debug] [-h|--help] [--ignorelockingfailure] [--nosuffix]
[-P|--partial] [--unitshHbBsSkKmMgGtTpPeE] [--version] [VolumeGroupName[VolumeGroupName...]]
vgdisplay --columns | -C [--aligned][-d|--debug][-h|-?|--help] [--ignorelockingfailure][--noheadings][--nosuffix]
[-o|--options[+]Field[,Field]] [-O|--sort[+|-]Key1[,[+|-]Key2[,...]]] [-P|--partial] [--separatorSeparator] [--unbuffered] [--unitshHbB-
sSkKmMgGtTpPeE] [-v|--verbose] [--version] [VolumeGroupName[VolumeGroupName...]]
DESCRIPTION
vgdisplay allows you to see the attributes of VolumeGroupName (or all volume groups if none is given) with it's physical and logical vol-
umes and their sizes etc.
vgs (8) is an alternative that provides the same information in the style of ps (1).
OPTIONS
See lvm for common options and vgs for options given with --columns.
-A, --activevolumegroups
Only select the active volume groups.
-c, --colon
Generate colon separated output for easier parsing in scripts or programs. N.B. vgs (8) provides considerably more control over the
output.
The values are:
1 volume group name
2 volume group access
3 volume group status
4 internal volume group number
5 maximum number of logical volumes
6 current number of logical volumes
7 open count of all logical volumes in this volume group
8 maximum logical volume size
9 maximum number of physical volumes
10 current number of physical volumes
11 actual number of physical volumes
12 size of volume group in kilobytes
13 physical extent size
14 total number of physical extents for this volume group
15 allocated number of physical extents for this volume group
16 free number of physical extents for this volume group
17 uuid of volume group
-s, --short
Give a short listing showing the existence of volume groups.
-v, --verbose
Display verbose information containing long listings of physical and logical volumes. If given twice, also display verbose runtime
information of vgdisplay's activities.
--version
Display version and exit successfully.
--columns|-C
Display output in columns, the equivalent of vgs. Options listed are the same as options given in vgs (8).
SEE ALSO
lvm(8), vgs(8), pvcreate(8), vgcreate(8), lvcreate(8)
Sistina Software UK LVM TOOLS 2.02.95(2) (2012-03-06) VGDISPLAY(8)