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D-Link FAQ => ShareCenter FAQs => Topic started by: JavaLawyer on April 19, 2012, 09:46:46 AM

Title: DNS ShareCenter - HDD Hibernation
Post by: JavaLawyer on April 19, 2012, 09:46:46 AM
Enabling hibernation enables users to specify how long a HDD sits idle (not accessed) before spinning down.

Pros and Cons of Hibernation

Many competing theories exist on the subject of hibernation. The hibernation settings you select will depend on the school of thought you follow. Spinning-up a HDD creates stress on the spindle motors, which over time may potentially reduce life expectancy. That said, keeping a HDD in a constant spin-state will increases heat generation and creates other forms of stress that may impact life expectancy. Meanwhile, other theories state that says that HDDs are designed to spin up/down, and are rated for x number of spin up/down cycles, so using these cycles is considered normal use.

Using Hibernation

The first time a hibernating HDD is accessed, there will be a 8 to 10 second delay while the HDD spins-up. After this initial delay, the HDD will access normally until the next hibernation.

Depending on your ShareCenter usage patterns and hibernation settings, hibernation may impact productivity.

For example, if you access the ShareCenter three times per hour, with a hibernation time of 10 minutes, then there is a strong likelihood that the HDD will be spun-down before each access attempt, causing a 10 second delay 100% of the time. If the hibernation time is increased from 10 minutes to 45 minutes, then the HDD will be spun-up most (if not all) of the time, eliminating the delay.  Alternatively, a 10 minute hibernation may be appropriate if you access the ShareCenter only once per hour.

If you chose to use hibernation, adjust the timing to meet your usage habits. Selecting the correct balance will minimize disruption to productivity, maximize energy savings, and minimize HDD wear and tear.