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Unable to reduce the size of volume group?

 
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Top Forums UNIX for Dummies Questions & Answers Unable to reduce the size of volume group?
# 8  
Old 01-04-2012
Hi pinga123,

first of all, have you a backup of yuor data? Are you doing this on test or production system?
Remember to take all possible precautions to prevent data loss BEFORE doing anything. Take into account the possibility of having a downtime of the system you're working with.

Check man pages for command pvresize; it shoul allow you to resize the PV with the option '--setphysicalvolumesize size'.

Look also at the 'RESTRICTIONS' section of the man pages.

You can use the -t and -v flags to see what the output of the command would be without actually doing any change.

see ya
fra
# 9  
Old 01-04-2012
Yes i m doing it on test env.

Will keep you updated.
# 10  
Old 01-04-2012
I recall there may be a vgmodify command but at the time I was using it, it was "at your own risk" unsupported still in developpment at HP and only very few non HP people (like me, perhaps methyl) knew and had access.
I know its included in hpux 11.31 ( sorry I have no, so no man to read...) but was it ported to linux?
# 11  
Old 01-04-2012
I did this.
Code:
# pvresize --setphysicalvolumesize 150G /dev/xvdb5
  WARNING: /dev/xvdb5: Overriding real size. You could lose data.
  Physical volume "/dev/xvdb5" changed
  1 physical volume(s) resized / 0 physical volume(s) not resized

and able to update lvdisplay and vgdisplay now they both show 150gb .

Code:
# vgdisplay
  --- Volume group ---
  VG Name               vg00
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  8
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                3
  Open LV               2
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               150.00 GB
  PE Size               4.00 MB
  Total PE              38399
  Alloc PE / Size       25625 / 100.10 GB
  Free  PE / Size       12774 / 49.90 GB
  VG UUID               NL5ws1-uaxQ-Wmtm-75GZ-WnQX-S7Vd-XeHJuS

Code:
# pvdisplay
  --- Physical volume ---
  PV Name               /dev/xvdb5
  VG Name               vg00
  PV Size               150.00 GB / not usable 3.81 MB
  Allocatable           yes
  PE Size (KByte)       4096
  Total PE              38399
  Free PE               12799
  Allocated PE          25600
  PV UUID               D7Cn29-bDLg-u153-LXEf-Jrel-y255-RCjEb6

But there is still problem in fdisk output cylinder size is not in sync????

Code:
Disk /dev/xvdb: 161.0 GB, 161061273600 bytes
255 heads, 63 sectors/track, 19581 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

    Device Boot      Start         End      Blocks   Id  System
/dev/xvdb1               1       26108   209712478+   5  Extended
/dev/xvdb5               1       26108   209712447   8e  Linux LVM

---------- Post updated at 05:06 AM ---------- Previous update was at 05:05 AM ----------

Quote:
Originally Posted by vbe
I recall there may be a vgmodify command but at the time I was using it, it was "at your own risk" unsupported still in developpment at HP and only very few non HP people (like me, perhaps methyl) knew and had access.
I know its included in hpux 11.31 ( sorry I have no, so no man to read...) but was it ported to linux?
Code:
# vgmodify
-bash: vgmodify: command not found

Smilie
# 12  
Old 01-04-2012
May you please show the output of:
Code:
pvs --units s
parted /dev/xvdb unit s print

# 13  
Old 01-04-2012
Code:
# pvs --units s
  PV         VG   Fmt  Attr PSize      PFree
  /dev/xvdb5 vg00 lvm2 a-   314564608S 104849408S


# parted /dev/xvdb unit s print
Error: Can't have a partition outside the disk!
Information: Don't forget to update /etc/fstab, if necessary.

# 14  
Old 01-04-2012
Sorry, I meant
Code:
parted /dev/xvdb1 unit s print
parted /dev/xvdb5 unit s print

 
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