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Network Attached Storage (NAS)

NAS stands for network attached storage. It is a self-contained computer that connects to a home, or business network. A NAS consists of hard disk storage that includes a multi disk raid system, which allows for a file-based storage platform that allows clients (computers) to access a shared storage space.

QNAP TS-453BU 4 Bay 4GB Desktop NAS server
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  • Number of Bays - 2
  • Total Storage Capacity - 0
  • Memory - 2GB
  • Controller type - Serial ATA-600
  • Raid Level - RAID 1
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  • Number of Bays - 2
  • Total Storage Capacity - 0GB
  • Memory - 2GB
  • Controller type - Serial ATA-600 / eSATA-600
  • Raid Level - RAID 1
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  • Number of Bays - 4
  • Total Storage Capacity - 0
  • Raid Level - RAID 5 hot spare
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  • Number of Bays - 4
  • Total Storage Capacity - 0GB
  • Controller type - Serial ATA-600 / eSATA
  • Raid Level - RAID 6
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  • Number of Bays - 4
  • Total Storage Capacity - 0GB
  • Memory - 2GB
  • Raid Level - JBOD
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  • Number of Bays - 2
  • Total Storage Capacity - 0GB
  • Controller type - Serial ATA-600
  • Raid Level - 0,1
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  • Number of Bays - 2
  • Total Storage Capacity - 0GB
  • Memory - 2GB
  • Raid Level - RAID 6
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  • Number of Bays - 2
  • Total Storage Capacity - 0GB
  • Controller type - Serial ATA-600
  • Raid Level - RAID 1
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  • Number of Bays - 2
  • Total Storage Capacity - 0GB
  • Memory - 2GB
  • Controller type - Serial ATA-600
  • Raid Level - JBOD
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  • Number of Bays - 4
  • Total Storage Capacity - 0GB
  • Memory - 2GB
  • Raid Level - JBOD
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  • Number of Bays - 2
  • Total Storage Capacity - 0
  • Memory - 0.256GB
  • Controller type - Serial ATA-300
  • Raid Level - RAID 1
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  • Number of Bays - 2
  • Total Storage Capacity - 8TB
  • Raid Level - RAID 1
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The main purpose of a NAS is to provide centralized, shared storage. Most consumer and small business NAS support SATA drives, but there are a few models out there that support SSD drives. It's not unusual to see NAS for home users support up to 8TB storage capacity. Business-class NAS boxes typically scale even higher, with some offering petabytes of capacity.

ONE, TWO, OR FOUR BAYS? Since a NAS device is at the heart just a container for a hard drive or drives, the No. 1 spec for any NAS unit is its potential storage capacity, determined by the number of drive bays it includes. Most consumer-grade and home-office NAS units have one or two bays, while models designed for the office have four or more.


Why you need NAS
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