Dell PS4100 Technical Information download pdf (Page 15)

June 2012 Dell EqualLogic Configuration Guide v13.2 9

2.3.4 Controller Types in PS4100/PS6100 models

The new controller types available in the PS4100 and PS6100 model arrays became available starting

in August 2011. Table 5 lists each Dell EqualLogic controller along with some characteristics.

Table 5 PS4100/PS6100 controller types

Controller

Type

Faceplate

Network

Interfaces

Storage

Type

Notes

Type 11

4 x 1GbaseT

1 x 10/100Mb mgt

SAS

NL-SAS

SSD

•

PS6100 Only

• 4GB Cache

• Supports vertical

port failover

• Cache to Flash

memory destaging

Type 12

2 x 1GbaseT

1 x 10/100Mb mgt

SAS

NL-SAS

•

PS4100 Only

• 4GB Cache

• Supports vertical

port failover

• Cache to Flash

memory destaging

Type 14

1 x 10GbE SFP+

1 x 10GbaseT

10/100Mb mgt

SAS

NL-SAS

SSD

•

PS6110 Only

• 4GB Cache

• Support for vertical

port failover

• Cache to Flash

memory destaging

SFP+ OR 10GBaseT

used at any given

time.

Type 17

1 x 10GbE SFP+

1 x 10GbaseT 1 x

10/100Mb mgt

SAS

NL-SAS

•

PS4110 Only

• 4GB Cache

• Supports vertical

port failover

• Cache to Flash

memory destaging

SFP+ OR 10GBaseT

used at any given

time.

2.3.5 Controller Redundancy in PS4100/PS6100 controllers

Each array can be configured with either a single controller, or dual redundant controllers. The single

controller configuration will provide the same level of I/O performance as a dual controller

configuration. The dual controller configuration provides for redundancy. Redundant controllers will

prevent volume connections between hosts and SAN from being dropped in the event of an active

controller failure.

The

Active Controller

is the controller which is processing all disk and network I/O operations for the

array. A second controller in dual controller configurations will always be in a “passive” operating

mode. In this mode, the secondary controller will exhibit the following characteristics:

• Each of its Ethernet ports are electrically inactive (active lights are off), unless a vertical port

failover has occurred.

• The passive controller cache mirrors the cache of the active controller.

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