Data And Interface Module Features; Feature Codes For Data Modules - IBM XIV Gen3 Series Planning Manual

Data and interface module features

This information describes the data and interface module options for the IBM XIV
Storage System.
For data and interface modules with 1 TB limited-capacity, the modules contain
2 TB DDMs, but the usable capacity is limited to 1 TB by using the short-stroking
method. By short stroking the DDM, only the outer sectors of the disk platters are
used to store data. Head repositioning delays are minimized, which results in
shorter access times and increased I/O performance.
Capacity on Demand (CoD) modules are modules that are physically installed in
the rack and fully functional but that are not 'activated' for use until more capacity
is needed. Additional capacity is activated by ordering a miscellaneous equipment
specification (MES) with the appropriate CoD activation feature. In reality,
installing the CoD activation feature allows for the use of an additional,
incremental portion of total system capacity that is proportional to the share of a
CoD module in the system. For example in a 15-module system, if three of the
modules are ordered as CoD (and not yet activated), this means that initially the
customer is only licensed to use 12/15 of the system usable capacity. By activating
the three CoD modules, the customer will then be licensed to fully utilize the
system usable capacity (or 15/15 of the capacity).
CoD activation features do not require physical installation. If you receive
notification to install this feature, only report the installation according to the
field-reporting guide for your respective geographical area.
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IBM XIV Gen3 281x-11x, 281x-21x, and 281x-314 Planning Guide
Table 12. Feature codes for data modules
Feature description
1 TB limited-capacity data modules
2 TB data modules
2 TB CoD data module
2 TB module CoD activation
2 TB self-encrypting module CoD
activation
3 TB data modules
3 TB CoD data module
3 TB module CoD activation
3 TB self-encrypting module CoD
activation
4 TB data modules
4 TB CoD data module
4 TB self-encrypting module CoD
activation
6 TB data modules
6 TB CoD data module
6 TB self-encrypting module CoD
activation
Feature code
Model Model
281x-114 281x-214
1123 2016
1126 2026
1146 2028
1149 4020
4021
1136 2036
1148 2038
1150 4030
4031
2042
2044
4041
2062
2064
4061
Model
281x-314
5042
5044
6041
5062
5064
6061