Installation guide

Chapter 4. LVM Administration with CLI Commands

# lvs

LV VG Attr LSize Origin Snap% Move Log Copy% Convert

lvol0 new_vg owi-a- 52.00M

newvgsnap1 new_vg swi-a- 8.00M lvol0 0.20

Using the -v argument with the lvs command adds the following fields to the default display:

seg_count, lv_major, lv_minor, lv_kernel_major, lv_kernel_minor, lv_uuid.

# lvs -v

Finding all logical volumes

LV VG #Seg Attr LSize Maj Min KMaj KMin Origin Snap% Move Copy% Log

Convert LV UUID

lvol0 new_vg 1 owi-a- 52.00M -1 -1 253 3

LBy1Tz-sr23-OjsI-LT03-nHLC-y8XW-EhCl78

newvgsnap1 new_vg 1 swi-a- 8.00M -1 -1 253 5 lvol0 0.20

1ye1OU-1cIu-o79k-20h2-ZGF0-qCJm-CfbsIx

You can use the --segments argument of the lvs command to display information with default

columns that emphasize the segment information. When you use the segments argument, the seg

prefix is optional. The lvs --segments command displays the following fields by default: lv_name,

vg_name, lv_attr, stripes, segtype, seg_size. The default display is sorted by vg_name,

lv_name within the volume group, and seg_start within the logical volume. If the logical volumes

were fragmented, the output from this command would show that.

# lvs --segments

LV VG Attr #Str Type SSize

LogVol00 VolGroup00 -wi-ao 1 linear 36.62G

LogVol01 VolGroup00 -wi-ao 1 linear 512.00M

lv vg -wi-a- 1 linear 104.00M

lv vg -wi-a- 1 linear 88.00M

Using the -v argument with the lvs --segments command adds the following fields to the default

display: seg_start, stripesize, chunksize.

# lvs -v --segments

Finding all logical volumes

LV VG Attr Start SSize #Str Type Stripe Chunk

lvol0 new_vg owi-a- 0 52.00M 1 linear 0 0

newvgsnap1 new_vg swi-a- 0 8.00M 1 linear 0 8.00K

The following example shows the default output of the lvs command on a system with one logical

volume configured, followed by the default output of the lvs command with the segments argument

specified.

# lvs

LV VG Attr LSize Origin Snap% Move Log Copy%

lvol0 new_vg -wi-a- 52.00M

# lvs --segments

LV VG Attr #Str Type SSize

lvol0 new_vg -wi-a- 1 linear 52.00M