radius less than 38 mm (1.5") when extended and do not become pinched
when retracted.
Guidelines for replacing a component
Observe the following guidelines when replacing a component.
• Use only the replacement parts specified in this guide.
• Do not perform maintenance when the storage system is being started,
Wait for the READY LED on the controller to go on before performing
maintenance.
• If you replace a drive, controller, cache memory, front end module, backup
module, back end module, ENC, fan, or power supply unit while the
storage system is turned on:
○ Wait at least 20 seconds after the failed part was removed before
installing the new part.
○ Complete the replacement within 10 minutes. Otherwise, the system
might turn off due to an abnormal rise in temperature.
If a power supply unit and another component fail at the same time,
replace the power supply unit first, and then replace the other failed
component. Otherwise, the system might turn off due to an abnormal rise
in temperature.
• If a fan on the controller fails at the same time when another component
fails, replace the fan first, and then replace the other failed component.
Otherwise, the system might turn off due to an abnormal rise in
temperature.
• Insert replacement parts quickly. Otherwise, the recovery might fail.
• If only the power main switch is off, the power is provided by the basic
supply. Do not leave components removed from the storage system for
long periods of time because this can trigger a power supply alarm.
• If the replacement part has a cover over one or more connectors, replace
the cover of the connector part that is going to be used.
Guidelines to follow after replacing a component
Observe the following guidelines after replacing a component in the Hitachi
storage system.
• When restarting the storage system, wait for the amber POWER LED to go
ON, and then turn off the main switch. Wait at least one minute before
turning on the main switch.
• After you replace components, close all the external storage system
covers.
80 Replacing storage system components
Service Guide for VSP Gx00 and VSP Fx00 Models
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