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Table 8. Capacity for models 281x-114 and 281x-214 XIV systems
Number of
modules in the
Number of
rack
interface modules
6
3
9
6
10
6
11
6
12
6
13
6
14
6
15
6
Table 9. Capacity for model 281x-314 XIV systems
Number of
modules in the
Number of
rack
interface modules
9
6
10
6
11
6
12
6
13
6
14
6
15
6
Note: DDMs in the XIV system do not need to be repaired immediately upon
failure because the XIV system is fully redundant, even with the failures.
Replacement for failed DDMs is deferred until the third DDM fails, or until
another component requires immediate onsite maintenance. For administrators, if a
DDM fails but replacement is deferred, the IBM XIV Storage Management GUI
displays the DDM as pale red, and the Status as Failed (Deferred). When there are
three or more DDMs in failed state, the IBM XIV Storage Management GUI
displays the failed DDMs as bright red, and the Status as Failed. For IBM service
representative (technicians), the IBM XIV Storage Management GUI displays the
failed DDM as bright red, and the Status as Failed regardless of whether the
replacement is deferred.
Processors and memory
The information lists the number of processors and memory that are available in
fully populated and partially populated racks.
16
IBM XIV Gen3 281x-11x, 281x-21x, and 281x-314 Planning Guide
Number of data
modules
3
3
4
5
6
7
8
9
Number of data
modules
3
4
5
6
7
8
9
Table 10. Processors and memory for XIV model 281x-314
Number of modules
Number of
in the rack
processors
9
18
10
20
11
22
Total usable capacity in TB
Number of disk
(1 TB limited capacity / 2
drives
TB / 3 TB / 4 TB / 6 TB)
72
28 / 55 / 84 / 112 / 169
108
44 / 88 / 132 / 177 / 267
120
51 / 102 / 154 / 207 / 311
132
56 / 111 / 168 / 225 / 338
144
63 / 125 / 190 / 254 / 382
156
67 / 134 / 203 / 272 / 409
168
75 / 149 / 225 / 301 / 453
180
80 / 161 / 243 / 325 / 485
Number of disk
Total usable capacity in TB
drives
(4 TB / 6 TB)
108
177 / 267
120
207 / 311
132
225 / 338
144
254 / 382
156
272 / 409
168
301 / 453
180
325 / 485
Memory cache in GB
(4 TB / 6 TB)
864
960
1056
SSD cache in TB
(800 GB SSD)
7.2
8.0
8.8
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