General :: LVM2 On F10 - Reduce LVM Size And Remove 2 HDDs?
Oct 15, 2009
I have the following HDDs in an LVM2 configuration on an F10 box running Mythtv :-
# pvscan
PV /dev/sda2 VG VolGroup00 lvm2 [297.88 GB / 0 free]
PV /dev/sdd1 VG VolGroup00 lvm2 [931.50 GB / 0 free]
PV /dev/sdb1 VG VolGroup00 lvm2 [298.06 GB / 0 free]
PV /dev/sdc1 VG VolGroup00 lvm2 [931.50 GB / 0 free]
Total: 4 [2.40 TB] / in use: 4 [2.40 TB] / in no VG: 0 [0 ]
The system never uses more than about 250GB of HDD at any one time, so I would like to remove /dev/sdd1 and /dev/sdc1 from the LV and then from the machine and leave /dev/sda and /dev/sdb alone.
Does anyone know that if I use the command "system-config-lvm" to reduce the total LVM size to say 580GB, whether all data is preserved (I don't have any way at this stage to backup up 250GB of data, unless I buy more HDDs and that is the whole point of this exercise anyway - remove the two terrabyte drives to be used as backup disks).
Once I am happy that the data is safe, I will use "pvmove" and "vgreduce" to remove both terrabyte drives.
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Feb 14, 2010
I have a rack of four 1TB drives all partitioned identically with three primary partitions. On each drive
- the first partition is only 64MB;
- the second is a large 900GB partition and
- the last holds all the remaining space
mdadm has been used to set up
/dev/md0 - RAID1, comprised of /dev/sda1 and /dev/sdb1
/dev/md1 - RAID5, comprised of /dev/sda2, /dev/sdb2, /dev/sdc2, /dev/sdd2
/dev/md2 - RAID5, comprised of /dev/sda3, /dev/sdb3, /dev/sdc3, /dev/sdd3
OK, so it was a silly mistake to make - but I am now need to increase the size of /dev/md0. My thinking is to reduce the size of md1 so that I can grow md0.
On md1 I have two logical volumes. I've successfully reduced the size of the volume so that I can reduce the size of md1. Now I'm at the nervous stage; I can find little written on the topic of shrinking RAID5 arrays - and even if I do this I'm unsure if I can move partitions around to regain the space I so desire.
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Oct 31, 2010
How to reduce the size of a file. Is truncate related to this?
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Aug 15, 2010
I have copied some vides from my camcorder and the size seems a bit excessive - 140mb for 3 mins! Is there a program I can use to save the .mp2 file as .mpg and reduce the size?
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Oct 18, 2010
I have a HDD that has 2 partitions. the 2nd partition is the VG and I want to reduce its size. I have reduced the Largest LV in the VG and now have free space in the VG. But, I am clueless on how to proceed to reduce the partiton size so that I can use it for another need.
When done, I expect to have 3 parttions total on the HDD. But first, I could some help in understanding the steps necessary for me to take, to move the free space out of the partition that has the Volume Group. Then, i can use fdisk on that 3rd partition for my needs.
I already know how to expand a Volume group by adding PVs, but, I do NOT know and cannot find how to reduce it to recover the free space in the VG to be used in a new partiton. (Better explained..."I want to reduce the physical partition size that the VG represents.)
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May 10, 2010
I need to create a temporary Filesystem and the only way to do it is to reduce /var and create a new filesystem 3GB size
Code:
df -h
/dev/mapper/VolGroup00-var
9.7G 1.5G 7.8G 16% /var
my question is according to google search I need to umount the filesystem point in order to reduce its size.... so it means I will require that nobody uses the system? since /var logs a lot information?
I also have the option to reduce /root but I think is more complicated.
so what are the precautions in order to reduce /var/?
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Jan 3, 2011
I'm new to Fedora 14, vmware player. After getting Fedora up and running in VMware player. The disk size was 2.7 GB. After three hours of working with it, the disk size has bloated to 4.3 GB. I havent added software to account for the near doubling in size. How do I reduce the size back to 2.7GB range or lower. Im new to Fedora and superuser controls. Im removing more software than adding software. Is this a VMWARE problem or Fedora problem?
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Apr 18, 2010
I would like to build a NAS from PC (D510MO) running Debian. I have two HDDs (one 3.5 1T and one 2.5 500G).
On 3.5 HDD I have already two partitions 100M+40G dedicated for Win7-64. Now, I want to install Debian (second OS) on this PC and to have some kind of soft RAID or disk mirror of 500G space. I am planning to create a third partition on 3.5 HDD of 500G (identical as 2.5 HDD size) in order to have a mirror 500G space.
Please send my some suggestions on where I have to install Debian; on 500G 2.5HDD or 500G 3.5HDD!Will Debian boot from both HDDs 3.5 or 2.5 after I create the mirror? What Linux soft I have to use for mirroring (mdadm)?
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Feb 11, 2010
I'm going to be using LVM2 to mirror 2 250GB drives for redundancy and fault-tolerance. As per the best docs I have found on mirroring [URL], I am going to keep the log file on a separate physical volume, however I can't seem to find anywhere a good reference for how much size I need to save for the log file. Everything says "small," but "small" doesn't really help in the real world :-).
I have plenty of space on the 3rd pv but want to leave as much of it as possible for other stuff. Should I leave 32MB ? 500MB ? 1GB?
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Jul 7, 2010
I made 272 Photos from one book. Total size was 920MB. I used than gscan2pdf to create pdf document, and reduced there quality size. Result 116 MB. Than i converted it to grayscale [URL] with:
Code:
gs -sOutputFile=grayscale.pdf -sDEVICE=pdfwrite
-sColorConversionStrategy=Gray -dProcessColorModel=/DeviceGray
-dCompatibilityLevel=1.4 -dNOPAUSE -dBATCH color.pdf
Result: 108MB
Is it anyway possible to reduce size more? Something like Google does with their books?
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Aug 1, 2010
i m using ubuntu 10.4 version and i want to knw that is their any software or something else so that i can resize my images from 2 mb to in kb as my image folder is of 614 mb and i want to put that folder images in my mobile so how can i reduce the size of that folder
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Feb 17, 2010
I was cloned an entire disk (with one NTFS partition of 70GB, only 15GB used) using ddrescue with the following command...
Code:
ddrescue --no-split /dev/sda /media/usb250/ntfs.img /media/usb250/ntfs.log
The img file it's around 70GB. Now I want to restore it to another computer with 30GB of space. How can I reduce the size of img file?
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Aug 27, 2010
I have a server with 2 harddisks, configured a one logical LVM block. I would like to reduce the total footprint and remove the 2nd harddisk.
What is the best way to do this? I understand that Gparted has yet to support LVM.
My details as follows:
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
282G 11G 257G 4% /
/dev/sda3 99M 12M 82M 13% /boot
[Code]....
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Jan 12, 2011
I have my current computer set up with 2 HDDs in it. A 500GB with GRUB and Windows 7 on it and a 160GB HDD with Ubuntu on it.
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EDIT: I'd like to do this without re-installing anything.
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Mar 11, 2010
I'm all new to linux. I've got Fedora core 12 - I'm ex windows user. I have these 3 websites to maintain: These are in finnish language. So called pikalaina sites:
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vipit
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Sep 25, 2010
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Mar 26, 2009
i have /var mounted on /dev/sda4 which consists of 38 GB i want to get 8 GB from /dev/sda4 as this partion will remain of 30 GB.how can i get 8GB in such a way that my OS will not hurt.
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Apr 30, 2016
I installed Debian 8 Jessie with full disk encryption and chose to have everything on the same partition. After install, I notice that my 8GB laptop has a 16GB swap. Is there a way to reduce the swap to 8GB (or maybe 4) whilst not affecting the encryption?
I have a 1TB HDD so space is not an issue but I dislike such waste. The setup used LVM.
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Aug 21, 2010
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Jun 7, 2010
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Jul 31, 2010
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Aug 23, 2010
Can the size of the Ubuntu desktop window be reduced so that it displays on a monitor or via a data projector with a surrounding black border? If so, how? The tragicomic chain of events which leads to the question is as follows. Community group, short of cash, want to equip lecture room. Pull-down screen is set up permanently on one wall. Contractor sets up old data projector via ceiling mount. Data projector is just too far away from wall, such that image cannot be reduced sufficiently by the data projector to fit on the screen.
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Jun 29, 2011
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Jan 13, 2010
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Jan 21, 2009
I have been asked to investigate some of our servers that run tripwire 2.3.0 on Red Hat Linux Advanced Server release 2.1AS (Pensacola)
We have the reports emailed to us using cron and twprint -m r -r report -t 4, it has been growing steadily and today it was 9mb It seems the database records go back to before 2004 and are being compared against today's files.
I really need to be informed what needs to be done to tripwire to keep it serviced through cron. I have tried to google this but could not find any information that seemed to answer my questions.
Looking at the following guide url step 6 talks about "Updating the Database after an Integrity Check" using
Code:
# tripwire --update --twrfile /var/lib/tripwire/report/<name>.twr Should I be using this command or should I be re-creating the db every month or so and using the #tripwire -init?
Extract from report -
Quote:
-------------------------------------------------------------------------------
Section: Unix File System
-------------------------------------------------------------------------------
Rule Name Severity Level Added Removed
Modified
--------- -------------- ----- ------- --------
Invariant Directories 66 0 0 0
code....
I need to understand how to change the expected to the observed so the db will be up to date.
I would also like some of the rules explained:What does removed and added mean? Is it removed as it has not changed and added if it finds a new one that has?
Code:
-------------------------------------------------------------------------------
Rule Name: System boot changes (/lib/modules)
Severity Level: 100
-------------------------------------------------------------------------------
----------------------------------------
Added Objects: 3075
----------------------------------------
code....
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Nov 23, 2009
This is my situation: on a LVM2 partition, i have shrink a logical volume to free new space for a new partition.
My system-config-lvm screen: http://forums.fedoraforum.org/attach...1&d=1258988216 code...
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Jun 3, 2009
I have a home directory which is mounted on the LVM partition,How can i reduce the size of LVM partiotion without loosing the data on home directory...whenever i use lvreduce command it show me a warning mesg that the whole data will be lost...reducing the size of LVM partition without loosing my home directory data.
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