Re: maximum number of partitions

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From	Scott Hemphill <hemphill@hemphills.net>
Newsgroups	comp.os.linux.hardware
Subject	Re: maximum number of partitions
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Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> writes:

> On Sun, 05 Jun 2016 16:18:55 +0200, Aragorn wrote:
>> Physical extents can be disk blocks, hard disks, hard disk partitions or
>> even logical volumes, depending on the context.
>
> Thanks for the explanation!

I would normally think of physical extents as the allocation unit for a
volume group.  When you are creating a volume group you can choose how
big you want the physical extents to be.

As a practical example of volume management, I recently had a system
that was running out of space on the root volume group, which contained
a single logical volume with the root filesystem on it.  (This
filesystem contained all the normal system files including /home.)  The
system also had a database volume group that was fine.  The root volume
group was 40G in size.  I had another 80GB drive hotswap-added to the
system, and caused the kernel to rescan the SCSI bus so I could see the
drive.  I created two new 40GB partitions, because I knew that I would
want to add the 40GB to the root volume group, and I was holding the
other 40GB in reserve.  I used vgextend to add the space on the new
partition to the root volume group.  I then used lvextend to both add
the space to the root logical volume and resize the ext4 root
filesystem.  Voila!  I now had an 80GB root filesystem without rebooting
a production machine!

Scott
-- 
Scott Hemphill	hemphill@alumni.caltech.edu
"This isn't flying.  This is falling, with style."  -- Buzz Lightyear

Thread

maximum number of partitions Haines Brown <haines@engels.histomat.net> - 2016-05-26 13:16 -0400
  Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-05-26 20:22 +0200
    Re: maximum number of partitions Haines Brown <haines@engels.histomat.net> - 2016-05-26 16:02 -0400
      Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-05-26 21:02 +0000
        Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-05-27 00:36 +0200
        Re: maximum number of partitions Haines Brown <haines@engels.histomat.net> - 2016-05-27 07:08 -0400
          Re: maximum number of partitions floyd@apaflo.com (Floyd L. Davidson) - 2016-05-27 04:03 -0800
            Re: maximum number of partitions Haines Brown <haines@engels.histomat.net> - 2016-05-27 09:25 -0400
              Re: maximum number of partitions floyd@apaflo.com (Floyd L. Davidson) - 2016-05-27 05:53 -0800
                Re: maximum number of partitions Haines Brown <haines@engels.histomat.net> - 2016-05-27 12:48 -0400
          Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-05-27 14:50 +0200
  Re: maximum number of partitions Vilmos Soti <vilmos@soti.ca> - 2016-05-26 12:40 -0700
  Re: maximum number of partitions Marc Haber <mh+usenetspam1118@zugschl.us> - 2016-05-26 22:29 +0200
    LVM [was: maximum number of partitions] Haines Brown <haines@engels.histomat.net> - 2016-05-27 07:44 -0400
      Re: LVM [was: maximum number of partitions] Marc Haber <mh+usenetspam1118@zugschl.us> - 2016-05-27 18:07 +0200
  Re: maximum number of partitions Richard Kettlewell <rjk@greenend.org.uk> - 2016-05-26 22:27 +0100
    Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-05-27 06:05 +0000
      Re: maximum number of partitions Richard Kettlewell <rjk@greenend.org.uk> - 2016-05-27 08:36 +0100
        Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-05-27 12:17 +0200
        Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-05-27 18:49 +0000
          Re: maximum number of partitions Robert Nichols <SEE_SIGNATURE@localhost.localdomain.invalid> - 2016-05-27 19:08 -0500
            Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-05-28 07:11 +0000
              Re: maximum number of partitions Robert Nichols <SEE_SIGNATURE@localhost.localdomain.invalid> - 2016-05-28 09:22 -0500
      Re: maximum number of partitions Aragorn <thorongil@telenet.be.invalid> - 2016-05-27 10:07 +0200
      Re: maximum number of partitions Marc Haber <mh+usenetspam1118@zugschl.us> - 2016-05-27 18:07 +0200
        Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-05-27 20:30 +0200
          Re: maximum number of partitions Marc Haber <mh+usenetspam1118@zugschl.us> - 2016-05-28 00:05 +0200
            Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-05-28 04:45 +0200
              Re: maximum number of partitions Marc Haber <mh+usenetspam1118@zugschl.us> - 2016-05-28 07:26 +0200
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-05-28 07:15 +0000
                Re: maximum number of partitions Marc Haber <mh+usenetspam1118@zugschl.us> - 2016-05-28 10:25 +0200
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-05-28 11:14 +0000
                Re: maximum number of partitions Marc Haber <mh+usenetspam1118@zugschl.us> - 2016-05-28 13:52 +0200
                Re: maximum number of partitions Aragorn <thorongil@telenet.be.invalid> - 2016-05-28 18:46 +0200
                Re: maximum number of partitions Marc Haber <mh+usenetspam1118@zugschl.us> - 2016-05-28 19:57 +0200
                Re: maximum number of partitions Aragorn <thorongil@telenet.be.invalid> - 2016-05-28 20:15 +0200
                Re: maximum number of partitions Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2016-05-28 12:04 -0700
                Re: maximum number of partitions Marc Haber <mh+usenetspam1118@zugschl.us> - 2016-05-28 22:47 +0200
                Re: maximum number of partitions Aragorn <thorongil@telenet.be.invalid> - 2016-05-29 07:36 +0200
                Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-05-29 13:48 +0200
                Re: maximum number of partitions Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2016-06-04 09:50 +0200
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-06-05 10:10 +0000
                Re: maximum number of partitions Aragorn <thorongil@telenet.be.invalid> - 2016-06-05 14:31 +0200
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-06-05 13:53 +0000
                Re: maximum number of partitions Aragorn <thorongil@telenet.be.invalid> - 2016-06-05 16:18 +0200
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-06-05 18:53 +0000
                Re: maximum number of partitions Scott Hemphill <hemphill@hemphills.net> - 2016-06-05 17:58 -0400
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-06-06 14:09 +0000
                Re: maximum number of partitions Scott Hemphill <hemphill@hemphills.net> - 2016-06-06 10:32 -0400
                Re: maximum number of partitions Aragorn <thorongil@telenet.be.invalid> - 2016-06-06 16:48 +0200
                Re: maximum number of partitions Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2016-06-08 22:23 +0200
                Re: maximum number of partitions Richard Kettlewell <rjk@greenend.org.uk> - 2016-06-06 15:55 +0100
                Re: maximum number of partitions Aragorn <thorongil@telenet.be.invalid> - 2016-06-06 17:41 +0200
                Re: maximum number of partitions Richard Kettlewell <rjk@greenend.org.uk> - 2016-06-06 17:23 +0100
                Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-06-06 22:36 +0200
                Re: maximum number of partitions Richard Kettlewell <rjk@greenend.org.uk> - 2016-06-06 21:51 +0100
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-06-07 04:54 +0000
                Re: maximum number of partitions Richard Kettlewell <rjk@greenend.org.uk> - 2016-06-07 08:43 +0100
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-06-07 19:04 +0000
                Re: maximum number of partitions Richard Kettlewell <rjk@greenend.org.uk> - 2016-06-07 20:30 +0100
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-06-08 07:08 +0000
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-06-06 15:50 +0000
                Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-06-05 16:03 +0200
                Re: maximum number of partitions noSpam@gmail.com - 2016-07-18 18:57 +0000
                Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-05-28 17:10 +0200
                Re: maximum number of partitions Richard Kettlewell <rjk@greenend.org.uk> - 2016-05-28 18:07 +0100
                Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-05-28 21:33 +0200
  Re: maximum number of partitions novinhael@gmail.com - 2017-02-07 18:10 -0800
    Re: maximum number of partitions Robert Nichols <SEE_SIGNATURE@localhost.localdomain.invalid> - 2017-02-08 07:58 -0600
    Re: maximum number of partitions faeychild <faeychild@nomail.afraid.org> - 2017-02-13 15:23 +1100
      Re: maximum number of partitions "Carlos E. R." <robin_listas@invalid.es> - 2017-02-13 08:04 +0100
    Re: maximum number of partitions "Carlos E. R." <robin_listas@invalid.es> - 2017-02-13 08:12 +0100

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