Dell EqualLogic PS4210 Hardware Owner's Manual

Also see for EqualLogic PS4210: Installation and setup guide Installation

Contents

Dell EqualLogic PS4210 Hardware Owner's Manual Manual pdf 26 page image

PS4210 Hardware Owner's Manual 3 Maintaining Control ModulesFigure 16: Standby Button LocationEnabling the Standby FeatureTo use the standby button, a group administrator must enable the feature in the Group Manager GUI or CLI.Enabling the use of the button applies groupwide; that is, it allows you to press the button to shut down anymember (array) that has the standby button (PS4100, PS4110, PS4210, PS6100, PS6110, and PS6210 arraymodels). You do not need to enable use of the button on each member separately.Only a user with group administrator privileges can enable the standby feature on the group. However, anyonecan press the button, and the group cannot determine who put the array into standby on/off mode. Therefore,group administrators should consider their environment's security concerns before enabling this feature.Using the Standby On/Off ButtonAfter the feature is enabled groupwide, you can use the Standby On/Off button on either control module of anyapplicable member to shut down the array quickly without using the Group Manager GUI or CLI.You must press in and hold the Standby On/Off button for at least two (2) seconds to shut down the member tothe standby state. To fully shut down the array, turn off the switches on the power supply and cooling modules.To turn the member back on, press and hold the Standby On/Off button again (and ensure the power supplyswitches are turned back to the on position).Important ConsiderationsUse the Standby On/Off button only when you must shut down a member fast, in situations where you do nothave access to the Group Manager GUI or CLI. For example, you discover a problem in your lab environment,such as high temperature or a water leak, that might damage the array.In standby mode, all volumes that use space on that member or that are bound to that member becomeunavailable. All operations on the member are suspended, no I/O activity to or from the member occurs, and themember's firmware is not running.Using the Standby On/Off button on one member does not affect any other group members, with the exception ofthe Group Lead member. When the group lead member is in standby mode, it takes a few minutes for the grouplead to fail over to another member. You must press the standby button on each member to restore power to themember that is in standby mode. Group members that do not have the standby button remain online; to shut themdown, you must use the GUI or CLI.Replacing a Control ModuleIf a control module fails, remove it and replace it with a functioning control module, as described in this section.You will need to swap the battery from the old to the new control module before inserting the replacementcontrol module.20