Nondisruptive Service And Upgrades; High Temperature Mode - Hitachi G1500 Hardware Manual

Nondisruptive service and upgrades

The storage systems are designed specifically to avoid any interruptions during normal
operations while servicing or upgrading the system components.
Main components can be "hot-swapped" (added, removed, or replaced without
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disruption) during normal operation. These include every module in the controller
chassis and the drive chassis, such as power supplies, virtual storage directors, front-
end directors, and back-end directors, cache and cache backup modules, SVPs, and
drives.
A service processor (SVP) mounted in the controller chassis monitors the operating
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condition of the storage system. Connecting the SVP with a service center allows
authorized service personnel to manage the system remotely.
An online, nondisruptive upgrade of the Storage Virtualization Operating Systems
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(SVOS) can run during normal operation without shutting down or restarting the
storage system.
Optional Migration Enablement Service (includes pilot migration) is available to jump-
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start self-service migration. For complex, large-scale, heterogeneous, and remote
replication data center environments, nondisruptive migration service from Hitachi
Global Solution Services (GSS) is required. Contact your HDS authorized sales or
service representative for more information.

High temperature mode

High temperature mode is a feature that allows the storage system to operate at
standard temperature (60.8°F to 89.6°F / 16°C to 32°C) or higher temperatures (60.8°F to
104°F / 16°C to 40°C), saving energy and cooling costs. Temperature sensors at the air
inlets in the primary microprocessor blades measure the ambient air temperature.
High temperature mode window
High temperature mode is set through the Edit High Temperature Mode window in the
Device Manager - Storage Navigator GUI. The window also displays alerts when the
ambient air temperature exceeds the preset limits.
In standard temperature mode, a temperature alert (SIM) appears when the
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temperature in the storage system exceeds 89.6°F / 32°C.
In high temperature mode, the temperature alert (SIM) appears when the
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temperature in the storage system exceeds 104°F / 40°C.
System life
The lifetime of the system is five years when operating in the standard temperature
mode. This lifetime is reduced when operating the system in high temperature mode,
even if you change the system to standard temperature mode later.
Cache flash memory battery life
When high temperature mode is enabled, the cache flash memory battery life is reduced
to two-thirds of the battery life when high temperature mode is enabled.
Chapter 1: VSP G1000, VSP G1500, and VSP F1500 overview
Hitachi Virtual Storage Platform G1000, G1500, and VSP F1500 Hardware Guide
Nondisruptive service and upgrades
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