Expand CKD volumes
Unisphere supports the expansion of CKD volumes.
Prerequisites
See Roles and associated permissions to determine the user roles that can perform this task.
You can expand a volume up to 1,182,006 cylinders (1 TB). To expand a device above 565,250 cylinders, the new size must be a multiple of 1113 cylinders. If you specify a size that is not that multiple, the system rounds the size up to the next multiple of 1113.
You cannot expand a volume when it is:
- A CKD 3380 device
- A TDAT
- Marked as Soft Fenced
- Part of aN SRDF session
- Part of a SnapVX session
The following procedure describes one way to expand a CKD volume. You can also carry out this task from or .
Steps
-
In the
Volume Capacity field of the
Expand Volume dialog box, type or select the new capacity of the volume. The
Total Capacity and
Additional Capacity figures update automatically.
NOTE:In 10.1.0.0, there has been a change in the rounding of GB/TB/MB to cylinders when creating or expanding a volume. Creating or expanding a volume in TB/GB/MB in some scenarios results in a volume slightly smaller or slightly larger than if you had created the same size volume in TB/GB/MB in release 10.0, for example, creating a 2TB vol is 1118481 Cyl in 10.1.0.0 , but in 10.0 a 2TB vol is 1118482 Cyl).
If you want to create a volume in 10.1.0.0 and need to guarantee that it exactly matches the size of a volume that was created using 10.0, you must specify the volume size in Cylinders and not TB/GB/MB when creating or expanding.