NAS, Backup & Storage Tech Dictionary (0–E)


 

Covering

0 A B C D E

0

3-2-1 Backup Rule -

A data backup strategy that recommends keeping 3 copies of your data: 2 on different storage devices (like a NAS and an external hard drive) and 1 offsite (such as in the cloud) to ensure data safety in case of hardware failure, theft, or disasters.
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A


Access Control -

A security method that manages who can access data, systems, or resources by setting permissions and restrictions. It ensures that only authorized users can view, modify, or manage specific files or settings, protecting sensitive information.
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ACL (Access Control List) -

An Access Control List (ACL) is a security tool that defines which users or groups can access specific files or folders on a network storage system. It controls permissions like read, write, or execute, providing granular security for data.
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B


Backup -

A backup is a copy of important data stored separately from the original to protect against data loss. Backups can be saved on NAS devices, external drives, or cloud storage, ensuring data recovery in case of hardware failure, accidental deletion, or cyberattacks.
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Bad Sector -

A bad sector is a damaged part of a hard drive or SSD that can’t store data reliably. It may cause data corruption or slow performance. Regular backups and disk checks help detect and prevent data loss from bad sectors.
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Bandwidth -

Bandwidth refers to the maximum amount of data that can be transferred over a network connection in a given time, usually measured in Mbps or Gbps. Higher bandwidth improves file transfer speeds, especially when using NAS devices for large data files.
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Bit Rot -

Bit rot is the gradual degradation of data stored on hard drives or SSDs, causing files to become corrupted over time. It can affect long-term data storage. Using checksums and regular data integrity checks helps prevent bit rot.
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C


Cache -

Cache is a small, high-speed storage area that temporarily holds frequently accessed data to improve performance. In NAS devices, cache (often using SSD cache) speeds up read and write operations for faster file access.
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Capacity -

Capacity refers to the total amount of data that a storage device, like a hard drive or NAS, can hold. It’s measured in gigabytes (GB) or terabytes (TB), and higher capacity allows for storing more files, applications, or backups.
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Checksum -

A checksum is a value generated from data using an algorithm to verify its integrity. It helps detect errors or corruption during file transfers or storage. NAS systems often use checksums to ensure data remains accurate over time.
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CIFS (Common Internet File System) -

CIFS is a network protocol that allows file sharing between devices, commonly used in Windows networks. It enables users to read, write, and manage files on NAS devices over a network. CIFS is an older version of SMB (Server Message Block).
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Cloud Backup -

Cloud backup is the process of copying data from a local device, like a NAS, to a remote cloud server for protection against data loss. It provides offsite storage, making it easy to recover data in case of hardware failure or disasters.
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Cloud Sync -

Cloud sync automatically keeps files updated between a local device, such as a NAS, and a cloud storage service. Changes made to files in one location are instantly reflected in the other, ensuring seamless data access across devices.
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D


Data Replication -

Data replication is the process of copying data from one device to another, such as between NAS devices, to ensure data availability and redundancy. It helps protect against data loss by keeping identical copies in different locations.
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DDNS (Dynamic Domain Name System) -

DDNS automatically updates the IP address linked to a domain name, allowing remote access to devices like NAS even if the IP changes. It’s useful for maintaining a stable connection without a static IP.
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DHCP (Dynamic Host Configuration Protocol) -

DHCP is a network protocol that automatically assigns IP addresses to devices on a network. It simplifies network management by ensuring devices like computers, printers, and NAS systems get the correct settings without manual configuration.
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Disaster Recovery -

Disaster recovery is a strategy for restoring data and systems after events like hardware failures, cyberattacks, or natural disasters. It often involves backups, data replication, and recovery plans to minimize downtime and data loss.
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Disk Encryption -

Disk encryption secures data by converting it into unreadable code, protecting it from unauthorized access. In NAS devices and hard drives, encryption ensures sensitive files remain safe even if the device is stolen or compromised.
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DNS (Domain Name System) -

DNS is like the internet’s phonebook, translating domain names (like yamaware.com) into IP addresses that computers use to identify each other. It’s essential for accessing websites and services over the internet.
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E


ECC (Error-Correcting Code) Memory -

ECC memory is a type of RAM that detects and corrects minor data errors before they cause system crashes or corruption. It’s commonly used in NAS devices, servers, and workstations where data integrity is critical, helping to prevent silent data corruption over time.
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Encryption -

Encryption is a security method that converts data into unreadable code to protect it from unauthorized access. It’s commonly used in NAS devices, hard drives, and network communications to keep sensitive information secure, even if intercepted or stolen.
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