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Re: How to Resize Partition on LVM

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According to "man lvm", to add a physical volume to a volume group, the 
right command is "vgextend" (the name is because you make a volume group 
(VG) larger by adding more storage space for it, in a new physical 
volume). To create a new volume group, the command is "vgcreate". But if 
you want to add a filesystem, you *need not* (and very likely, should 
not) add a volume group nor a physical volume. What you need is: (1) 
Create a local volume within your existing volume groups; use lvcreate 
for that. (2) Make a filesystem with "mkfs.ext4" (or similar, for other 
filesystem type). (3) Optionally add a corresponding entry in /etc/fstab 
and mount the new filesystem.

A typical structure is this (where "->" means "stored in"); it is not 
the only possible layout, but it is likely the most common one and seems 
to be the one you are using:

Files -> Filesystem -> LVM LV -> LVM VG -> LVM PV
   -> Partition -> Disc or SSD

The structure is NOT hierarchical, and not all of these arrows represent 
the same relationship between components. In particular, note that a LVM 
VG does both grouping and ungrouping: It *takes* storage space from 
(possibly several) physical volumes, and it *provides* storages space to 
(possibly several) *logical volumes*.

The main information resource are the main pages. Also see 
<http://www.tldp.org/HOWTO/LVM-HOWTO/index.html>. Do your own research.

El 25/10/15 a las 19:22, ray escribió:
> Mario,
>
> Thank you for the review.
>
> Yes, there is free space in the LVM.  I have gone through the manual many times (today and the last several months) and don't see a method to add a pv or vg.  It seems to add a pv, it needs a device.  And to add a vg, it needs a pv.  How can I add either?
>
> Displaying the resize pv:
> # pvdisplay -v -m
>      DEGRADED MODE. Incomplete RAID LVs will be processed.
>      Scanning for physical volume names
>    --- Physical volume ---
>    PV Name               /dev/sda5
>    VG Name               mycomp-vg
>    PV Size               55.00 GiB / not usable 3.00 MiB
>    Allocatable           yes
>    PE Size               4.00 MiB
>    Total PE              14079
>    Free PE               1695
>    Allocated PE          12384
>                   (the file system is smaller than the pv)
>   lsblk
> NAME                   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
> sda                      8:0    0   477G  0 disk
> ├─sda1                   8:1    0   243M  0 part /boot
> ├─sda2                   8:2    0     1K  0 part
> └─sda5                   8:5    0 476.7G  0 part
>    ├─mycomp--vg-root   254:0    0   8.4G  0 lvm  /
>    ├─mycomp--vg-var    254:1    0   2.8G  0 lvm  /var
>    ├─mycomp--vg-swap_1 254:2    0  31.9G  0 lvm  [SWAP]
>    ├─mycomp--vg-tmp    254:3    0   380M  0 lvm  /tmp
>    └─mycomp--vg-home   254:4    0     5G  0 lvm  /home
>
>

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How to Rezize Partition on LVM ray <ray@aarden.us> - 2015-10-24 03:30 +0200
  Re: How to Rezize Partition on LVM Charlie Kravetz <cjk@teamcharliesangels.com> - 2015-10-24 04:40 +0200
  Re: How to Rezize Partition on LVM Mario Castelán Castro <marioxcc.MT@yandex.com> - 2015-10-24 04:40 +0200
  Re: How to Rezize Partition on LVM Pascal Hambourg <pascal@plouf.fr.eu.org> - 2015-10-24 17:50 +0200
    Re: How to Rezize Partition on LVM ray <ray@aarden.us> - 2015-10-25 14:00 +0100
      Re: How to Rezize Partition on LVM Pascal Hambourg <pascal@plouf.fr.eu.org> - 2015-10-25 16:00 +0100
        Re: How to Rezize Partition on LVM ray <ray@aarden.us> - 2015-10-25 20:10 +0100
        Re: How to Rezize Partition on LVM ray <ray@aarden.us> - 2015-10-25 20:30 +0100
          Re: How to Rezize Partition on LVM Mario Castelán Castro <marioxcc.MT@yandex.com> - 2015-10-25 20:50 +0100
            Re: How to Resize Partition on LVM ray <ray@aarden.us> - 2015-10-26 02:50 +0100
              Re: How to Resize Partition on LVM Mario Castelán Castro  <marioxcc.MT@yandex.com> - 2015-10-26 03:20 +0100
              Re: How to Resize Partition on LVM Pascal Hambourg <pascal@plouf.fr.eu.org> - 2015-10-26 10:00 +0100
                Re: How to Resize Partition on LVM Mario Castelán Castro  <marioxcc.MT@yandex.com> - 2015-10-26 15:20 +0100
                Re: How to Resize Partition on LVM ray <ray@aarden.us> - 2015-10-27 05:10 +0100

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