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Re: Resizing LVM partitions

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On Mon, Jan 22, 2024 at 10:41:57PM +0100, Miroslav Skoric wrote:
> As I need to extend & resize more than one LV in the file system (/, /usr,
> and /var), should they all need to be unmounted before the operation? As I
> remember, it is ext3 system on that comp.

Whaaaaat??  I don't think these words mean what you think they mean.

An LV is a logical volume, which is like a virtual partition.  It's a
block device, like /dev/sda2.  You can use an LV the same way you would
use a partition -- you can use it for swap space, or a file system, or
other purposes.

A file system is a mountable directory structure that you can put inside
a partition, or an LV.  File system types include ext4, ext3, xfs, vfat,
and so on.

If your system has separately mounted file systems for /, /usr and
/var and you want to shrink ALL of them, then yes, you would need to
unmount all three of them, shrink them, then (re)boot.  You can't
unmount / during normal operations, so the only ways to shrink / would
involved booting in a special way, either with some external medium,
or with specific kernel parameters.  Thus, you'd typically reboot to
get back to normal operations afterward.

However, if you're in a position where you think you need to make
dramatic changes to FOUR of your mounted file systems, perhaps you
might want to consider restarting from scratch.  Ponder why you have
separate file systems at all.  Are they really giving you a benefit?
Have you ever filled up one of them and thought "Oh wow, I am *so*
glad I separated these file systems so I didn't fill up ___ as well!"
Or are they just giving you grief with no benefits?

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Thread

Resizing LVM partitions skoric@uns.ac.rs - 2024-01-22 16:00 +0100
  Re: Resizing LVM partitions Alain D D Williams <addw@phcomp.co.uk> - 2024-01-22 16:20 +0100
    Re: Resizing LVM partitions Stefan Monnier <monnier@iro.umontreal.ca> - 2024-01-22 16:40 +0100
      Re: Resizing LVM partitions Alain D D Williams <addw@phcomp.co.uk> - 2024-01-22 16:50 +0100
        Re: Resizing LVM partitions <tomas@tuxteam.de> - 2024-01-22 19:00 +0100
          Re: Resizing LVM partitions Miroslav Skoric <skoric@uns.ac.rs> - 2024-01-22 23:20 +0100
            Re: Resizing LVM partitions <tomas@tuxteam.de> - 2024-01-23 06:50 +0100
            Re: Resizing LVM partitions Andy Smith <andy@strugglers.net> - 2024-01-23 07:40 +0100
              Re: Resizing LVM partitions Miroslav Skoric <skoric@uns.ac.rs> - 2024-01-24 00:40 +0100
                Re: Resizing LVM partitions Greg Wooledge <greg@wooledge.org> - 2024-01-24 00:50 +0100
                Re: Resizing LVM partitions <tomas@tuxteam.de> - 2024-01-24 06:50 +0100
                Re: Resizing LVM partitions Greg Wooledge <greg@wooledge.org> - 2024-01-24 13:10 +0100
                Re: Resizing LVM partitions Miroslav Skoric <skoric@uns.ac.rs> - 2024-01-24 23:10 +0100
                Re: Resizing LVM partitions Greg Wooledge <greg@wooledge.org> - 2024-01-24 23:30 +0100
                Re: Resizing LVM partitions Stefan Monnier <monnier@iro.umontreal.ca> - 2024-01-25 15:20 +0100
                Re: Resizing LVM partitions Miroslav Skoric <skoric@uns.ac.rs> - 2024-01-26 13:40 +0100
                Re: Resizing LVM partitions Max Nikulin <manikulin@gmail.com> - 2024-01-24 03:30 +0100
                Re: Resizing LVM partitions Miroslav Skoric <skoric@uns.ac.rs> - 2024-01-24 23:20 +0100
                On the deprecation of separate /usr (Was: Re: Resizing LVM  partitions) Andy Smith <andy@strugglers.net> - 2024-01-24 23:30 +0100
                Re: Resizing LVM partitions Andy Smith <andy@strugglers.net> - 2024-01-24 13:10 +0100
        Re: Resizing LVM partitions Miroslav Skoric <skoric@uns.ac.rs> - 2024-01-22 23:20 +0100
          Re: Resizing LVM partitions Greg Wooledge <greg@wooledge.org> - 2024-01-22 23:30 +0100
            Re: Resizing LVM partitions Miroslav Skoric <skoric@uns.ac.rs> - 2024-01-24 00:40 +0100
    Re: Resizing LVM partitions Greg Wooledge <greg@wooledge.org> - 2024-01-22 17:10 +0100
      Re: Resizing LVM partitions <tomas@tuxteam.de> - 2024-01-22 19:10 +0100
        Re: Resizing LVM partitions Greg Wooledge <greg@wooledge.org> - 2024-01-22 19:50 +0100
        Re: Resizing LVM partitions Miroslav Skoric <skoric@uns.ac.rs> - 2024-01-24 00:40 +0100
      Re: Resizing LVM partitions Miroslav Skoric <skoric@uns.ac.rs> - 2024-01-24 00:40 +0100
    Re: Resizing LVM partitions Gremlin <scott-andrews@columbus.rr.com> - 2024-01-22 19:20 +0100
      Re: Resizing LVM partitions Greg Wooledge <greg@wooledge.org> - 2024-01-22 19:50 +0100
    Re: Resizing LVM partitions Miroslav Skoric <skoric@uns.ac.rs> - 2024-01-22 23:20 +0100

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