Safe way to shrink lvm vg_*-lv_swap partition and reclaim freed space on Linux?
Hello,
Code:
[root@host2 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 1024M 0 rom
sda 8:0 0 38.2G 0 disk
├─sda1 8:1 0 500M 0 part /boot
└─sda2 8:2 0 37.7G 0 part
├─vg_host2-lv_root (dm-0) 253:0 0 31G 0 lvm /
└─vg_host2-lv_swap (dm-1) 253:1 0 6.7G 0 lvm [SWAP]
ploop38874 182:621984 0 9.8G 0 disk
└─ploop38874p1 182:621985 0 9.8G 0 part /vz/root/1810
.
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My aim is to SAFELY shrink my swap partition (lvm vg_host2-lv_swap) so its size is 4GB and assign freed space to my root partition (lvm vg_host2-lv_root (dm-0)). I am on CentOS 6.10 64bit and i am wondering if i can do it on a running system without need to go into recovery - maybe i can go this way superuser.com/a/1024226/590209 (without reboot), maybe i can unmounting swap lvm on live system, but not lvresize (grow) root partition? How can i automatically grow root lvm partition during next boot (like editing boot parameters in grub)?
Last edited by centosadmin; 10-01-2019 at 06:53 AM..
Had a issue recently where DB admins did:
mv listener.log listener.log.old
gzip listener.log.old
Where file listener.log is continually being written to by an oracle process.
Anyway, according to the DB admins they successfully created the
listener.log.old.gz
file (i.e. all went okay).... (4 Replies)
Hi,
I have red hat enterprise 4. I would like to add more space on my lvm from the first partition that is not lvm type.
Here's the config
# fdisk -l
Disk /dev/sda: 73.4 GB, 73406611456 bytes
255 heads, 63 sectors/track, 8924 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes... (6 Replies)
I want to backup my partitions by shrinking it my issue is like
I want to create a new disk copy from only the used blocks I my current image.
How would I redirect the output of resize2fs to new disk and dd the current
partition so that I can boot my new image without issues and also without... (3 Replies)
Hi,
i have done a blunder here, i increased the swap space on Xen5.6 server machine using below steps :-
1056 dd if=/dev/zero of=/root/myswapfile bs=1M count=1024
1057 ls -l /root/myswapfile
1058 chmod 600 /root/myswapfile
1059 mkswap /root/myswapfile
1060 swapon /root/myswapfile
... (1 Reply)
Hi all,
Fedora 17, 64bit
Ubuntu 12.04 desktop 64bit
HD 160G
I installed Ubuntu 12.04 on the HD first taking up the whole disc. Later I added/installed Fedora 17 selecting the "Shrink" option and save the bootloader on /dev/sda1 to make them dualboot. Installation is successful with... (0 Replies)
My root file system is of type LVM. i wanna shrink it but unable to do so.
When i give the below command:
resize2fs /dev/mapper/VolGroup00-VolLog00 10000M
it messages that online shrink can't can't be done as the logical volume is mounted on /. i switched to single user mode by giving command:... (2 Replies)
Hi,
I need a suggesstion i have 2 disk if i installed OS / root partition by making Lvm in one disk and data in other disk also with the lvm, means 2 different lvms.
Is making LVM partition for OS disk will the performacne will be good?
Can i make 2 different lvm one is for OS and other for... (1 Reply)
Hello All,
I have a Red Hat Linux 5.9 Server installed with one hard disk & 2 Partitions created on it as follows,
/boot - Linux Partition & another is
LVM - One VG & under that 5-6 Logical volumes(var,opt,home etc).
Here my requirement is to take out 1GB of space from LVM ( Any logical... (5 Replies)
Hello everyone,
I am having an issue here with CentOS release 6.6 (Final) that shows all of the space used up, but I can't tell where the space went.
Seemingly I am using up 100%, according to
df -h
Filesystem Size Used Avail Use% Mounted on... (27 Replies)
Discussion started by: DannyBoyCentOS
27 Replies
LEARN ABOUT DEBIAN
acorn-fdisk
FDISK(8) BSD System Manager's Manual FDISK(8)NAME
acorn-fdisk -- partition editor for Acorn/RISC OS machines
SYNOPSIS
acorn-fdisk -h | --help | -v | --version
acorn-fdisk [-t scheme | --type scheme] -l | --list [device ...]
acorn-fdisk [-t scheme | --type scheme] -s | --size partition
acorn-fdisk [-t scheme | --type scheme] [device]
DESCRIPTION
The acorn-fdisk utility allows one to display or interactively edit partition tables for Acorn/RISC OS machines in various formats. Using
the PC/BIOS format, standard IBM PC (i386) partition tables can also be accessed. When no optional device is given, it defaults to /dev/hda
or /dev/sda.
The options are as follows:
-h | --help Display a short usage and exit immediately.
-l | --list Display the partition table(s) of all devices.
-s | --size Display the size of partition.
-t | --type Select the partitioning scheme to use. Valid schemes are:
EESOX Eesox SCSI on the Acorn machines.
ICSIDEFS ICS IDE.
Filecore/Linux Linux on Filecore. This uses the non-ADFS descriptor to point to the start of the disc to be partitioned. The
first two sectors contain a partition table to identify the Linux partitions contained within.
PC/BIOS PC/BIOS partitioning scheme. This consists of a partition table in the first sector of the disk which contains
both CHS and LBA values for the partitions. There can be up to four entries in the primary partition table.
One of these can be an extended partition containing up to four extra partitions.
PowerTec PowerTec SCSI on the Acorn machines.
Filecore/RISCiX RiscIX on Filecore.
-v | --version
Display the version of acorn-fdisk and exit immediately.
If neither -l | --list or -s | --size are given, the partition table of the given device will be edited interactively.
EXAMPLES
Display the default device's partition table on a PC:
acorn-fdisk --type PC/BIOS -l
Display the PC partition table of /dev/sda:
acorn-fdisk --type PC/BIOS --list /dev/sda
Display the size in blocks of the partition /dev/sda1:
acorn-fdisk --type PC/BIOS --size /dev/sda1
Edit the MBR partition table interactively:
acorn-fdisk --type PC/BIOS
Display the partition table of an MBR backed up to a file:
acorn-fdisk -t PC/BIOS -l mbrdump.bin
Display the size of the first partition on a device where the MBR would be restored from the backup file mbrdump.bin:
acorn-fdisk -t PC/BIOS -s mbrdump.bin1
AUTHORS
arm-fdisk was written by Russell King <rmk@arm.uk.linux.org> based on util-linux fdisk, which was written at least partially by
A. V. Le Blanc <LeBlanc@mcc.ac.uk>.
This manual page was written for the Debian system by
Thorsten Glaser <tg@debian.org> but may be used by others.
BSD October 2, 2010 BSD
10-01-2019
