Creating a Disk Group

Creating a Disk Group

To create a disk group, you add a disk to a disk group.

• You can add a single disk or multiple disks.
• You cannot add a disk to more than one disk group.
• Default disk media names vary with the interface used to add the disk to a disk group, but are conventionally in the format diskgroup##, such as datadg00, datadg01, and so on.
• Disk media names must be unique within a disk group
• Adding disks to a disk group provides additional storage capacity for creating volumes. Adding a disk to a disk group makes the disk space available for use in creating Volume Manager Volumes.

To create a diskgroup or add disks using vxdiskadm:

“Add or initialize one or more disks”

Initialize disks:

# vxdisksetup –i device_tag       [attributes]

# vxdisksetup –i Disk_1           (Enclosure-Based Naming)

# vxdisksetup –i c2t0d0           (Solaris and HP-UX)

# vxdisksetup –i hdisk2           (AIX)

# vxdisksetup –i sda2             (Linux)

Initialize the disk group by adding at least one disk:

Syntax:

# vxdg init diskgroup disk_name=device_tag

# vxdg init <dg_name> <dm_name>=<da_name>

# vxdg init testdg disk01=TagmaStore-USP0_1

# vxdg list

NAME         STATE           ID

testdg       enabled,cds          1209556163.42.testdev

# vxdg init newdg newdg01=Disk_1

Add more disks to the disk group:

# vxdg –g diskgroup adddisk disk_name=device_tag

# vxdg –g newdg adddisk newdg02=Disk_2