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Staggered spin up is an optional feature on many desktop SATA(or SAS) hard drives. Without staggered spin up, hard drives spin up when power is applied. In systems with a large number of hard drives, this can cause a significant power surge thereby reducing the MTBF of the system power supply. Enterprise SATA hard drives do not spin up their platters when power is applied. Instead, they wait until told to do so. With staggered spin-up, LSI MegaRAID adapters can spin up the drives one at a time. This provides greater overall reliability and prevents power surges. |
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