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What OS? By default in Windows 7 there is a Scheduled job called DEFRAGMENTATION.
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What OS? By default in Windows 7 there is a Scheduled job called DEFRAGMENTATION.

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at night when I don't use the computer I can hear the hard drive working very hard, I was wondering if there is a program I can run that will tell me what kind of activity is happening .
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at night when I don't use the computer I can hear the hard drive working very hard, I was wondering if there is a program I can run that will tell me what kind of activity is happening .

Hard drive activity

Storage devices include any device used for storing and retrieving digital information. Hard disk drives (HDDs) use one or more rigid ("hard") rapidly rotating disks (platters) coated with magnetic material. Data is accessed in a random-access manner, meaning that individual blocks of data can be stored or retrieved in any order and not only sequentially. The primary competing technology for secondary storage is flash memory in the form of solid-state drives (SSDs), but HDDs remain the dominant medium for secondary storage due to advantages in price per bit and per-device recording capacity. CD-RW (Compact Disc-ReWritable) is a digital optical disc storage format that allows information to be stored outside the mechanical HDD.

Storage Hardware

Hardware includes cell phones and other digital living devices, tablets, computers, servers, peripherals and components, printers and scanners, gaming consoles, networking hardware such as routers, hubs, switches and modems, storage devices and security equipment such as firewalls and other appliances.