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174 DS8000 Series: Concepts and Architecture
Activation refers to the retrieval and installation of the feature activation code into the
DS8000 system. The feature activation code is obtained using the DSFA Web site and is
based on the license scope and license value.
The high-level steps for storage feature activation are:
Have machine-related information available (model, serial number, and machine
signature). This information is obtained from the DS8000 Storage Manager.
Log onto the DSFA Web site.
Obtain feature activation keys by completing the machine-related information. The feature
activation keys can either be directly retrieved, saved onto a diskette, or they can be
written down.
Complete feature key activation by logging onto your DS8000 Storage Manager
application and apply the keys to the storage unit.
9.3.8 Scenarios for managing licensing
There are many ways to manage the license of a DS8000. Some scenarios may include
adding storage capacity to an existing licensed function or reallocating a license between
storage images.
Adding storage capacity to an existing licensed function
Assume you initially purchased a 2244 Point-in-Time Copy feature (2244–PTC) for 25
terabytes. After several months, you need an additional 20 TB for your Point-in-Time Copy
operations. To increase storage for the feature requires that you obtain a new license key,
and not install a larger license. However, this is a non-disruptive activity and does not require
that you reboot your machine. You have to complete the following steps to activate the keys:
Order two of feature 7203 (10 TB each of 2244–PTC) for example. You can order a
different combination of the features to get to your required amount.
You will receive a 2244 function authorization serial number from an IBM representative.
Retrieve the license key from the DSFA Web site.
This new license key represents the total capacity that you now have licensed (or 45 TB).
It licenses the original 25 TB plus the additional 20 TB, just ordered.
Enter the license key into the DS Storage Manager. This will replace the existing license
key with the new license key.
After successful installation of the license key, you now have 45 TB of 2244–PTC
capacity.
9.4 Capacity planning
The DS8000 offers high scalability while maintaining excellent performance. We have already
explained the scalability in 6.3, “Designed for scalability” on page 109. You know that the
physical storage capacity is not equal to the logical storage capacity that you can use for your
system. We explain how to estimate the logical capacity for the DS8000 in this section.
9.4.1 Logical configurations
The total capacity of physical disk drives in the DS8000 is not equal to the logical capacity
you can use because you configure RAID protection to protect your important data. The