IBM N Series, Hardware Manual

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Chapter 3. Mid-range systems
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򐂰 Integrated Fibre Channel, Ethernet, and SAS ports
򐂰 Quad-port 4 Gbps adapters (optional)
򐂰 Up to four Performance Acceleration Modules (Flash Cache)
򐂰 Diagnostic LED/LCD
򐂰 Dual redundant hot-plug integrated cooling fans and autoranging power supplies
򐂰 19 inch, rack-mountable unit
N6220
The IBM System Storage N6220 includes the following storage controllers:
򐂰
Model C15: A single-node base unit
򐂰
Model C25: An active/active dual-node base unit, which is composed of two C15 models
򐂰
Model E15: A single-node base unit, with an I/O expansion module
򐂰
Model E25: An active/active dual-node base unit, which is composed of two E15 models
The E xx models contain an I/O expansion module that provides more PCIe slots. The I/O
expansion is not available on C xx models.
N6250
The IBM System Storage N6250 includes the following storage controllers:
򐂰 Model E16: A single-node base unit, with one controller and one I/O expansion module
both in a single chassis
򐂰 Model E26: An active/active dual-node base unit, which is composed of two E16 models
The E xx model contains an I/O expansion module that provides more PCIe slots. The I/O
expansion is not available on C xx models
3.1.3 Functions and features common to all models
This section describes the functions and features that are common to all eight models.
Fibre Channel, SAS, and SATA attachment
All models include Fibre Channel, SAS, and SATA attachment options for disk expansion
units. These options are designed to allow deployment in multiple environments, including
data retention, NearStore, disk-to-disk backup scenarios, and high-performance,
mission-critical I/O intensive operations.
The IBM System Storage N series supports the following expansion units:
򐂰 EXN1000 SATA storage expansion unit (no longer available)
򐂰 EXN2000 and EXN4000 FC storage expansion units
򐂰 EXN3000 SAS/SATA expansion unit
򐂰 EXN3500 SAS expansion unit
Because none of the N62x0 models include storage in the base chassis, at least one storage
expansion unit must be attached. All N62x0 models must be mounted in a standard 19-inch
rack.
Dynamic removal and insertion of the controller
The N6000 controllers are hot pluggable. You do not have to turn off PSUs to remove a
controller in a dual-controller configuration.
PSUs are independent components. One PSU can run an entire system indefinitely. There is
no “2-minute rule” if you remove one PSU. PSUs have internal fans for self-cooling only.