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Old 01-21-2015, 06:20 PM   #1
linux4dje
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Question Resize LVM partitions


UPDATED:
I installed a Deb 7 Srv w LVM w following partitions:
The end product should become a mail server (Citadel) and in time also a Web server.
Code:
df -hT
Filesystem                Type      Size  Used Avail Use% Mounted on
rootfs                    rootfs    322M  141M  165M  46% /
udev                      devtmpfs   10M     0   10M   0% /dev
tmpfs                     tmpfs     100M  260K  100M   1% /run
/dev/mapper/deb--srv-root ext4      322M  141M  165M  46% /
tmpfs                     tmpfs     5,0M     0  5,0M   0% /run/lock
tmpfs                     tmpfs     200M     0  200M   0% /run/shm
/dev/sda1                 ext2      228M   18M  199M   9% /boot
/dev/mapper/deb--srv-home ext4      233G  188M  221G   1% /home
/dev/mapper/deb--srv-tmp  ext4      368M   11M  339M   3% /tmp
/dev/mapper/deb--srv-usr  ext4      8,3G  481M  7,4G   6% /usr
/dev/mapper/deb--srv-var  ext4      2,8G  236M  2,4G   9% /var

fdisk -l
Disk /dev/sda: 268.4 GB, 268435456000 bytes
255 heads, 63 sectors/track, 32635 cylinders, total 524288000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00064033

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048      499711      248832   83  Linux
/dev/sda2          501758   524285951   261892097    5  Extended
/dev/sda5          501760   524285951   261892096   8e  Linux LVM

Disk /dev/mapper/deb--srv-root: 348 MB, 348127232 bytes
255 heads, 63 sectors/track, 42 cylinders, total 679936 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/deb--srv-root doesn't contain a valid partition table

Disk /dev/mapper/deb--srv-swap_1: 2143 MB, 2143289344 bytes
255 heads, 63 sectors/track, 260 cylinders, total 4186112 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/deb--srv-swap_1 doesn't contain a valid partition table

Disk /dev/mapper/deb--srv-usr: 8996 MB, 8996782080 bytes
255 heads, 63 sectors/track, 1093 cylinders, total 17571840 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/deb--srv-usr doesn't contain a valid partition table

Disk /dev/mapper/deb--srv-var: 2998 MB, 2998927360 bytes
255 heads, 63 sectors/track, 364 cylinders, total 5857280 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/deb--srv-var doesn't contain a valid partition table

Disk /dev/mapper/deb--srv-tmp: 398 MB, 398458880 bytes
255 heads, 63 sectors/track, 48 cylinders, total 778240 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/deb--srv-tmp doesn't contain a valid partition table

Disk /dev/mapper/deb--srv-home: 253.3 GB, 253289824256 bytes
255 heads, 63 sectors/track, 30794 cylinders, total 494706688 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/deb--srv-home doesn't contain a valid partition table

pvs
PV         VG      Fmt  Attr PSize   PFree
/dev/sda5  deb-srv lvm2 a--  249,76g    0

lvs
LV     VG      Attr     LSize   Pool Origin Data%  Move Log Copy%  Convert
home   deb-srv -wi-ao-- 235,89g
root   deb-srv -wi-ao-- 332,00m
swap_1 deb-srv -wi-ao--   2,00g
tmp    deb-srv -wi-ao-- 380,00m
usr    deb-srv -wi-ao--   8,38g
var    deb-srv -wi-ao--   2,79g
Now i want to _shrink_ the HOME partition so I can expand my VAR partition. Looked for guides but haven't found any site useful so far

I tried to find a way to do it when I installed it but it didn't seem to offer me this at this time even I looked around for a while.

How do I do this shrinking of HOME and extending of VAR partition??
please be fairly specific as Im not a pro yet

Last edited by linux4dje; 01-22-2015 at 01:49 AM. Reason: Wrong format
 
Old 01-21-2015, 06:55 PM   #2
syg00
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When posting output use [code] tags, not [quote] tags.
If you want help, post sufficient detail - too much is better than not enough. If you're lucky, you won't need to alter partitions at all. Post all the output from the following
Code:
df -hT
fdisk -l
pvs
lvs
 
Old 01-22-2015, 12:27 AM   #3
veerain
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Read man pages of lvm and it's commands.
 
Old 01-22-2015, 01:53 AM   #4
linux4dje
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Updated

Im now a little confused by the output from fdisk -l and pvs. It says it doesn't contain a valid partition table.

Why??
 
Old 01-22-2015, 02:29 AM   #5
syg00
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In future please don't add data to an earlier post - it makes the thread disjointed and confusing to others.
The messages about invalid partition are for the LVM components - they are logical entities, not real (physical) partitions. The messages are unfortunate and can be ignored.

So you have only one pv, so you don't need to mess with the physical partitions - what you want to do can be achieved by LVM commands. Redhat have a good LVM admin Guide you should download and read - it has walk-throughs for various scenarios incuding what you want to do.
Also this guide seems good - it shows how to reduce the filesystem first to ensure you don't lose data.
 
Old 01-22-2015, 09:35 AM   #6
rknichols
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That guide is a bit behind the times. Both lvreduce and lvresize have a "-r" (--resizefs) option to resize the underlying filesystem, and it works with any filesystem supported by fsadm (ext2, ext3, ext4, ReiserFS, XFS).

Last edited by rknichols; 01-22-2015 at 09:36 AM.
 
  


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