LVM,邏輯卷.(logic volume manager)
Q.要如何擴充空間.
1.新增硬碟並分割.
a.fdisk /dev/sdb(n,p,t and w)
b.copy 原本的分割區(/home,sda*)內容到新的(sdb*,)(dd if=/home of=/mnt/sdb*)
c.edit /etc/fstab,(change /home to /mntsdb*)
2.LVM
(pre action, apt-get install lvm2)
*. PV,VG,PE and LV)
a.
b.to use fdisk to new 分割區(我這邊因不知為何需要去刪去除了boot ,root)再去新增才能看到)
(fdisk /dev/sda, d,del partion; n , create partion and t , change to LVM)
c.create 實体PV, pvcreate /dev/sda*)
d,create VG, (vgcreate,vgscan,vgdisplay,vgextern,vgreduce,vgchange and vgremove)
vgcreate NewVol /dev/sda*
d.create LV
#lvcreate -l **** -n lv_data NewVol (-l ,assign PE number, that see by vgdisplay, -n ,assign name)
e.format and mount
#mkfs.ext4 /dev/mapper/New****
#mkdir /mnt/data
#mount /dev/mapper/New**** /mnt/data
*add new PE,
#vgextend NewVol /dev/hdd*
#lvresiaze -l +***** /dev/mapper/New****
#resize2fs /dev/mapper/New****
*del PE
check remove PE size
#pvdisplay /dev/had*
#umount /mnt/data
#e2fsck -f /dev/mapper/New*****
#resize2fs /dev/mapper/New***** ****M(change real size)
#mount /dev/mapper/New**** /mnt/data
#lvresize -l -xxxx /dev/mapper/New**** (xxxx,the sub PE size)
to check PE allocation in /dev/sda*
( the free PE may be in /dev/da*,as 1274 at /dev/sda3 and 8 at /dev/sda4)
#pvmove /dev/sda*:0-1273 /dev/sda3:0-1273
#pvmove /dev/sda*:1273-1281 /dev/sda4:1272-1279
#vgreduce NewVol /dev/hda*
http://www.itkee.com/os/detail-eaf.html
http://aimwang.blogspot.tw/2013/10/vmware-lvm.html
http://blog.miniasp.com/post/2008/04/24/Create-Folder-ShortCut-under-Linux-environment.aspx
