IBM DS8800, Введение и руководство по планированию, Страница: 36 / 256

v Global Mirror and Metro/Global Mirror configurations are not supported in
System i environments
Machine types overview
The DS8700 and DS8800 include several machine types. Order a hardware machine
type for the storage unit hardware and a corresponding function authorization
machine type for the licensed functions that are planned for use.
Table 4 shows the available hardware machine types and their corresponding
function authorization machine types.
Table 4. Available hardware and function authorization machine types
Hardware Licensed functions
Hardware machine
type
Available hardware
models
Corresponding
function
authorization
machine type
Available function
authorization models
Machine type 2421
(1-year warranty
period)
Models 941, 94E, 951
and 95E
Machine type 2396
(1-year warranty
period)
Model LFA
Machine type 2422
(2-year warranty
period) Machine type 2397
(2-year warranty
period)
Machine type 2423
(3-year warranty
period) Machine type 2398
(3-year warranty
period)
Machine type 2424
(4-year warranty
period) Machine type 2399
(4-year warranty
period)
Because the 242x hardware machine types are built upon the 2107 machine type
and microcode, some interfaces might display
2107 . This display is normal, and is
no cause for alarm. The 242x machine type that you purchased is the valid
machine type.
Features overview
The DS8700 and the DS8800 are designed to provide you with high-performance,
connectivity, and reliability so that your workload can be easily consolidated into a
single storage subsystem.
The following list provides an overview of some of the features that are associated
with the DS8700 and the DS8800:
Note: Additional specifications are provided at www.ibm.com/systems/storage/
disk/ds8000/specifications.html.
Storage pool striping (rotate extents)
Storage pool striping is supported on the DS8000 series, providing
improved performance. The storage pool striping function stripes new
volumes across all ranks of an extent pool. The striped volume layout
reduces workload skew in the system without requiring manual tuning by
a storage administrator. This approach can increase performance with
minimal operator effort. With storage pool striping support, the system
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Introduction and Planning Guide