CentOS 6.0 -- how to create two logical volumes

Dear All, I tried to install CentOS 6.0 and couldn't create two logical volumes during the OS installation period. There are 4 hard drives (2*2TB, 2*3TB) in total for the server and I want to create two LV, one LV with one 2TB and the other LV with 3 HDs but couldn't find a way to do so. Eventually I installed OS with 4 stand alone physical HDs and used the commands listed below to create a logical volume which contained 3 HDs, but couldn't find the command gfs_mkfs. My questions are: 1) Is there any gui way to do so 2) Does the methods I used by following the link work or not, where can I find gfs_mkfs? thanks a lot for the help -- Annie pvcreate /dev/sda1 /dev/sdb1 /dev/sdc1 vgcreate new_vol_group /dev/sda1 /dev/sdb1 /dev/sdc1 lvcreate -L2G -n new_logical_volume new_vol_group gfs_mkfs -plock_nolock -j 1 /dev/new_vol_group/new_logical_volume)

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