Common Configuration Commands

Loading Disks

AIX can identify LUNs mapped by storage systems to host after the LUN scan command is run.

VxVM cannot directly manage the identified LUNs. It can manage the LUNs only after disks are loaded. The command to load disks is as follows:

vxdisk scandisks 

Displaying Disks Taken Over by VxVM

Run the vxdisk list command to display disks taken over by VxVM. The following is an example:

bash-3.2#vxdisk list

DEVICE       TYPE            DISK         GROUP        STATUS

disk_0       auto:LVM        -            -            LVM

disk_1       auto:LVM        -            -            LVM

huawei-s5500t0_4 auto:none       -            -            error

Initializing Disks

The state of disks taken over by VxVM for the first time is error. Such disks are not initialized and cannot be used. You need to run the vxdisksetup -i disk command to initialize disks. The state of a disk that is successfully initialized changes to online. The following is an example:

bash-3.2#vxdisksetup –i huawei-s5500t0_4

bash-3.2#vxdisk list

DEVICE       TYPE            DISK         GROUP        STATUS

disk_0       auto:LVM        -            -            LVM

disk_1       auto:LVM        -            -            LVM

huawei-s5500t0_0 auto:cdsdisk    -            -            online

Creating a Disk Group

After initializing disks, run the vxdg init disk group name disk name command to create a disk group. The following is an example:

bash-3.2#vxdg init dg1 huawei-s5500t0_0 huawei-s5500t0_1

bash-3.2#vxdisk list

DEVICE       TYPE            DISK         GROUP        STATUS

hdisk0       auto:LVM        -            -            LVM

hdisk1       auto:cdsdisk    -            -            error

hdisk2       auto:cdsdisk    -            -            error

huawei-s5500t0_0      auto:cdsdisk huawei-s5500t0_0  dg1  online invalid

huawei-s5500t0_1      auto:cdsdisk    huawei-s5500t0_1  dg1  online invalid huawei-s5500t0_2      auto:cdsdisk    -            -            online

Creating a Volume

After creating a disk group, run the vxassist -g disk group make volume name capacity to create a volume. The following is an example:

bash-3.2#vxassist -g dg1 make vo12 10g

bash-3.2#vxprint –g dg1 –t vo12

V Name RVG/VSET/CO KSTATE STATE LENGTH  READPOL  PREFPLEX UTYPE

v  v012 -          ENABLED ACTIVE 20971520 SELECT -         fsgen

Creating a File System

A created volume cannot be used unless it is mounted to a file system. The syntax of the file system creation command is the same here as that in LVM. The difference is the device name. The following is an example:

bash-3.2# mkfs -V vxfs /dev/vx/rdsk/dg1/vol2 

Mounting a Volume

After creating a volume, run the following command to mount the volume to a specific directory:

mount -V vxfs /dev/vx/dsk/<disk group>/<volume name> <mount directory>

Disabling a Volume

A disabled volume is unavailable to users and the state of the volume is changed from ENABLED or DETACHED to DISABLED. Run the following command to disable a volume:

vxvol -g disk group stop volume name

Enabling a Volume

An enabled volume is available to users and the state of the volume is changed from DISABLED to ENABLED or DETACHED.

Run the following command to enable a volume:

vxvol –g disk group start volume name

Deleting a Volume

Run the following command to delete a volume:

vxedit –g disk group -rf rm volume name

Exporting a Disk Group

In clusters, a volume group needs to be imported or exported during data backup and recovery. Before exporting a disk group, disable all volumes in the disk group. Then run the vxdg deport disk group command to export the disk group. The following is an example:

bash-3.2#vxvol -g dg1 stop vol1

bash-3.2#vxdg deport dg1

bash-3.2#vxdg list

NAME  STATE ID

Importing a Disk Group

Run the following command to import a disk group:

vxdg import disk group name

An imported disk group is available only after being activated. The following exemplifies how to activate a disk group:

bash-3.2#vxdg import dg1

bash-3.2#vxdg list

NAME STATE           ID

dg1     enabled,cds      1330044217.14.ibm130

bash-3.2#vxvol -g dg1 startall

Adding a Disk to a Disk Group

You can add disks to a disk group whose capacity is insufficient. Run the following command to add a disk to a disk group:

vxdg –g disk group name adddisk disk name

The following is an example:

bash-3.2#vxdg -g dg1 adddisk huasy-s5500t0_2

bash-3.2#vxdisk list

DEVICE       TYPE            DISK         GROUP      STATUS

hdisk0       auto:LVM        -            -            LVM

hdisk1       auto:cdsdisk    -            -            error

hdisk2       auto:cdsdisk    -            -            error

huasy-s5500t0_0      auto:cdsdisk huasy-s5500t0_0  dg1  online invalid

huasy-s5500t0_1      auto:cdsdisk    huasy-s5500t0_1  dg1  online invalid huasy-s5500t0_2      auto:cdsdisk    huasy-s5500t0_1  dg1  online invalid

Removing a Disk from a Disk Group

Run the following command to remove a disk from a disk group:

vxdg -g disk group name rmdisk disk name

The following is an example:

bash-3.2#vxdg -g dg1 rmdisk huasy-s5500t0_1

bash-3.2#vxdisk list 

DEVICE       TYPE            DISK         GROUP        STATUS

hdisk0       auto:LVM        -            -            LVM

hdisk1       auto:cdsdisk    -            -            error

hdisk2       auto:cdsdisk    -            -            error

huasy-s5500t0_0      auto:cdsdisk huasy-s5500t0_0  dg1  online invalid

huasy-s5500t0_1     auto:cdsdisk     -              -     online invalid

huasy-s5500t0_2      auto:cdsdisk    huasy-s5500t0_1  dg1  online invalid