I already have parititon contain data under lvm enviroment with centos 5.8output of fdisk -lroot@server [~]# fdisk -lDisk /dev/sda: 1000.2 GB, 1000204886016 bytes255 heads, 63 sectors/track, 121601 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes   Device Boot      Start         End      Blocks   Id  System/dev/sda1   *           1          25      200781   83  Linux/dev/sda2              26      121601   976559220   8e  Linux LVMoutput of lvdisplay# lvdisplay  --- Logical volume ---  LV Name                /dev/sysvg/ROOT  VG Name                sysvg  LV UUID                6oy3Rj-ka3K-mL9s-vjjG-1Iqw-dniq-UbWzvJ  LV Write Access        read/write  LV Status              available  # open                 1  LV Size                919.44 GB  Current LE             29422  Segments               1  Allocation             inherit  Read ahead sectors     auto  - currently set to     256  Block device           253:0  --- Logical volume ---  LV Name                /dev/sysvg/TMP  VG Name                sysvg  LV UUID                jTKLBt-eNz0-KxmV-E5Nk-jjC0-FlRb-qny62p  LV Write Access        read/write  LV Status              available  # open                 1  LV Size                9.88 GB  Current LE             316  Segments               1  Allocation             inherit  Read ahead sectors     auto  - currently set to     256  Block device           253:1  --- Logical volume ---  LV Name                /dev/sysvg/SHM  VG Name                sysvg  LV UUID                NpKjhl-tzzn-Dk3G-A6dl-4QJB-QCc2-IkbDH5  LV Write Access        read/write  LV Status              available  # open                 1  LV Size                2.00 GB  Current LE             64  Segments               1  Allocation             inherit  Read ahead sectors     auto  - currently set to     256  Block device           253:2output of df -hroot@server [~]# df -hFilesystem            Size  Used Avail Use% Mounted on/dev/mapper/sysvg-ROOT                      891G  125G  721G  15% //dev/mapper/sysvg-TMP                      9.6G  153M  9.0G   2% /tmp/dev/mapper/sysvg-SHM                      8.0G  8.0K  8.0G   1% /dev/shm/dev/sda1             190M   19M  162M  11% /boottmpfs                 8.0G  8.0K  8.0G   1% /dev/shmoutput for /etc/fstabroot@server [~]# cat /etc/fstab/dev/sysvg/ROOT /       ext3    usrjquota=quota.user,jqfmt=vfsv0        1       1/dev/sysvg/TMP          /tmp                    ext3    defaults        1 2/dev/sysvg/SHM  /dev/shm        ext3    defaults,usrquota       1       2LABEL=/boot             /boot                   ext3    defaults        1 2tmpfs                   /dev/shm                tmpfs   defaults        0 0devpts                  /dev/pts                devpts  gid=5,mode=620  0 0sysfs                   /sys                    sysfs   defaults        0 0proc                    /proc                   proc    defaults        0 0/tmp             /var/tmp                    ext3    defaults,bind,noauto        0 0I don't have any idea how to create swap partition , and i worried about creating cause any DATA LOSS
Create swap partition after install
centos;partition;hard disk;lvm;swap