Data Domain Capacity on Demand: HowTo extend the capacity on a DD2200 (Capacity On Demand)

Summary: This KB article explains how to complete the process for a DD2200C to be grown from the base configuration (7 disks) allowing a capacity of 4 TB post-comp to 7.5 TB post-comp through a license upgrade. The process would also be applicable to DD2200C with a base capacity of 13.18TB (7+5 disks) to be grown to the full 17.2 TB post-comp available through a similar license upgrade. ...

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Instructions

First, note disk capacity is measured in TB (1,000,000,000 bytes) and file sizes and FS space is reported in TiB (2^32, or 1,099,511,627,776 bytes) , hence there is approximately a 10% difference between disk capacities and FS capacities, just due to the use of different units.

A DD2200C comes by default with 7 2-TB SAS drives, with a raw capacity of approximately 14 TB. But the available FS capacity is capped to just 4 TB. However, via a COD license upgrade (Capacity on Demand) a customer can easily make the rest of the disk space available to the FS, hence having a total of approximately 7.5 TiB post-comp available for user data.

For the customer to grow the data filesystem to the larger size the process to follow is as shown below:
  • Customer must have a DD2200C to start with, note this is not the same as a plain DD2200
  • Customer must purchase a CONTROLLER-COD license from EMC, which unlocks the available raw disk capacity
  • The CONTROLLER-COD license must be added to the running DD2200C , in the same way as with any other license, for example from the GUI:
# license add <license-code>
  • After doing so the customer will something like the following in the output from the "df" command:
# df
Active Tier:
Resource           Size GiB   Used GiB   Avail GiB   Use%   Cleanable GiB*
----------------   --------   --------   ---------   ----   --------------
/data: pre-comp           -     4420.6           -      -                -
/data: post-comp     3795.4     2760.5      1034.9    73%              9.9
/ddvar                 49.2        3.1        43.7     7%                -
----------------   --------   --------   ---------   ----   --------------
The Active tier can be expanded by 3.18 TiB.
 * Estimated based on last cleaning of 2016/03/22 06:51:13.
  • Therefore, the only thing left to do to get the extra FS capacity is to expand the FS such as if new storage had been added to the system:
# filesys expand
The filesystem will be expanded approximately by 3.18 TiB.
Are you sure? (yes|no|?) [no]: yes
ok, proceeding.
########################################### [5%]
The approximate size of the filesystem is 6.95 TiB.

Additional Information

For further details, please check the "Data Domain DD2200 and DD2500 Systems Disk Storage Expansion", which has a detailed explanation of the process.

Affected Products

Data Domain
Article Properties
Article Number: 000019146
Article Type: How To
Last Modified: 25 Jul 2025
Version:  5
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