Posts Tagged ‘mkvg’
Although we have already discussed the use of VG Commands in detail in previous posts on LVM, this post will give a brief review about the various VG commands we have learned so far.
Command is used to create a new VG.
Command is used to add PVs to VG.
Command is used to remove PV from VG.
Command is used to change VG.
Command is used to list all the VG in the system.
Command is used to add/install a VG.
Command is used remove the VG from the system. we will discuss about the significance of exportvg command in detail in posts to come.
Command is used to reorganize the VG.
Command is used to synchronize a VG.
Command is used to make VG available to the system for use.
Command is used to make VG unavailable to the system.
Command is used to mirror all LV within a VG.
This post deals about the various steps involved in creating a file system.
Once a PV is available in the system, admin can list down the PVs by running the following command:
To Create a VG from a PV with Default Name, command used is:
# mkvg hdisk0
This command will create a VG with default name vg00.
Once a VG is created, LV is created with a default name lv00 and admin assigns number of LPs to the LV by running the following command:
# mklv vg00 10
To Check VG information interms of PPs assigned, command used:
# lsvg -p vg00
To Check VG information interms of LPs assigned, command used:
# lsvg -l vg00
To Check complete LV information, command used:
# lslv lv00
# lsvg -l vg00
After LV creation, a directory is created:
# mkdir /test01
After the creation of Directory, a FS is created by running the following command:
# crfs -v jfs -d lv00 -m /test01 -A yes
CRFS stands for create a File System.
-v flag is used to mention the type of file system admin is planning to create.
-d is used to know in which LV the file system will be created and -m for the directory on which the file system will be mounted.
- A flag is used to Activate the FS on Next Reboot.
P.S : there are 2 commands to create a FS:
The only difference between the two is, mkfs only creates a file system whereas crfs not only creates a FS in LV, it also mounts the FS on a directory and updates /etc/filesystem and ODM about the FS created.
A File System created using crfs command will have the same name as that of the directory. here /test01.
Next, admin mounts the FS by running:
# mount /test01
Verifies the FS is mounted or not:
To Display Complete FS information, command used is:
# df -m
Finally, we can check the complete information about PV, VG, LV and FS by running the following command:
# lsvg -o | lsvg -il
This post gave an insight on how a FS is created by creating a VG and LV first on a PV.
keep reading to know how unmounting is done and how a VG is created with a user defined name.
till then, Happy Learning !