Linux Logical Volume management adjust partition size

Test machine Various error, create a directory are error, DF looked at a bit, found Volgroup-lv_root 100%, virtual Disk full, how to do it

1, resolution process

# df-h//View Partitions# Umount/home//un-mount# e2fsck-f/dev/mapper/volgroup-lv_home//Partition Detection# resize2fs-p/dev/mapper/volgroup-lv_home 100G//Set the Lv_home virtual partition to 100G# Mount/home//Mount Home# df-h//View Partitions# lvreduce-l 100g/dev/mapper/volgroup-lv_home//Free Space# Vgdisplay//To view the amount of free space# Lvextend-l +311.47g/dev/mapper/volgroup-lv_root//Extending the Lv_root virtual partition# resize2fs-p/dev/mapper/volgroup-lv_root//lv_root Resizing Partitions

LVM (Logical Disk Management) with high flexibility.

2, detailed resolution process

[Email protected] ~]# DF-hfilesystem Size used Avail use%mounted on/dev/mapper/volgroup-lv_root 50G 47G 16M -% ///Lv_root's full.Tmpfs1.9G 72K1.9G1%/dev/SHM/DEV/SDA1 485M 40M 420M9% /Boot/dev/mapper/volgroup-lv_home 406G 19G 366G5%/Home//Lv_home A lot of space[[Email protected]~]# resize2fs-p/dev/mapper/volgroup-lv_home 100gresize2fs1.41. A( --may- .) Filesystem at/dev/mapper/volgroup-lv_home isMounted On/home; on-Line resizing Requiredon-line shrinking from 107865088To65536000Not supported.//first umount to RESIZE2FS[[Email protected]~]# Umount/home//Umount Home Directory[[Email protected]~]# resize2fs-p/dev/mapper/volgroup-lv_home 100gresize2fs1.41. A( --may- .) Please run first'e2fsck-f/dev/mapper/volgroup-lv_home'.//prompt for disk detection first[[Email protected]~]# e2fsck-f/dev/mapper/volgroup-lv_homee2fsck1.41. A( --may- .First step: Check Inode, block, and size step two: Check the directory structure 3rd step: Check the directory connectivity pass4: Checking Reference counts 5th step: Check Cluster summary information/dev/mapper/volgroup-lv_home:1459/16384000Files (4.0% non-contiguous),5914204/65536000Blocks[[email protected]~]# resize2fs-p/dev/mapper/volgroup-lv_home 100G//Reset SizeResize2fs1.41. A( --may- .) Resizing the filesystem on/dev/mapper/volgroup-lv_home to26214400(4k) blocks. Begin Pass2(max =32768) relocating block Xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxbegin pass3(max = -) is scanning inode table xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxthe filesystem on/dev/mapper/volgroup-lv_home isNow26214400BlocksLong. [[Email protected]~]# mount/home/[[Email protected]~]# DF-hfilesystem Size used Avail use%mounted on/dev/mapper/volgroup-lv_root 50G 47G 16M -% /Tmpfs1.9G 72K1.9G1%/dev/SHM/DEV/SDA1 485M 40M 420M9% /Boot/dev/mapper/volgroup-lv_home 99G 19G 75G -% /Home[[email protected]~]# lvreduce-l 100g/dev/mapper/volgroup-lv_home//Free SpaceWarning:reducing Active and open logical volume to100.00GiB This May DESTROY YOUR DATA (filesystem etc) Really want to reduce lv_home? [y/N]: Y reducing Logical volume lv_home to100.00GiB Logical Volume lv_home successfully resized[[email protected]~]# DF-hfilesystem Size used Avail use%mounted on/dev/mapper/volgroup-lv_root 50G 47G 16M -% /Tmpfs1.9G 72K1.9G1%/dev/SHM/DEV/SDA1 485M 40M 420M9% /Boot/dev/mapper/volgroup-lv_home 99G 19G 75G -% /Home[[email protected]~]# Vgdisplay---Volume Group---VG Name VolGroup System ID Format lvm2 Metadata areas1Metadata Sequence No5VG Access Read/write VG Status resizable MAX LV0Cur LV3Open LV3Max PV0Cur PV1Act PV1VG Size465.27GiB PE Size4.00MiB Total PE119109Alloc PE/Size39372/153.80GiB Free PE/Size79737/311.47GiB//Free SpaceVG UUID vt2v4t-byxs-tqqk-cy0h-ide3-pabx-Lufkrs[[email protected]~]# Lvextend-l +311.47g/dev/mapper/volgroup-lv_root//free space added to Lv_rootRounding size to boundary between physical extents:311.47GiB Extending Logical Volume Lv_root to361.47GiB Logical Volume lv_root successfully resized[[email protected]~]# resize2fs-p/dev/mapper/volgroup-LV_ROOTRESIZE2FS1.41. A( --may- .) Filesystem at/dev/mapper/volgroup-lv_root ismounted on/; on-Line resizing requiredold desc_blocks=4, new_desc_blocks = at    //wait here, the more you expand, the longer it takes.Performing an on-line resize of/dev/mapper/volgroup-lv_root to94757888(4k) blocks. The FileSystem on/dev/mapper/volgroup-lv_root isNow94757888BlocksLong. [[email protected] openfire]# DF-hfilesystem Size used Avail use%mounted on/dev/mapper/volgroup-lv_root 356G 48G 308G -% /Tmpfs1.9G 72K1.9G1%/dev/SHM/DEV/SDA1 485M 40M 420M9% /Boot/dev/mapper/volgroup-lv_home 99G 19G 75G -%/Home

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Author: submarine Eagle
Address: http://blog.51yip.com/linux/1699.html

Linux Logical Volume management adjust partition size