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Definição à espera.
Network-Attached Storage (NAS) is a dedicated file storage device that is connected to a computer network, providing centralized data storage and access for multiple users and devices. Unlike Direct-Attached Storage (DAS), where storage is directly connected to a single computer, NAS devices operate independently and are accessed over a network using standard network protocols like TCP/IP. A NAS unit typically consists of a storage enclosure containing one or more hard disk drives (HDDs) or solid-state drives (SSDs), a processor, memory, and a specialized operating system optimized for file sharing. NAS systems present storage to clients as shared folders or volumes, accessible via protocols such as Network File System (NFS) for Unix/Linux systems and Server Message Block (SMB) or Common Internet File System (CIFS) for Windows systems. This centralized approach offers several advantages, including simplified data management, improved data backup and recovery capabilities, enhanced collaboration, and scalability. NAS devices can be configured in various RAID (Redundant Array of Independent Disks) levels to provide data redundancy and improve performance. They are commonly used in homes and small to medium-sized businesses (SMBs) for purposes like file sharing, media streaming, personal cloud storage, and centralized backups. Enterprise-grade NAS solutions offer higher performance, greater capacity, and advanced features like data deduplication and snapshots.
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Center["Redes de armazenamento conectadas"]:::main
Rel_arweave["arweave"]:::related -.-> Center
click Rel_arweave "/terms/arweave"
Rel_storage_area_network["storage-area-network"]:::related -.-> Center
click Rel_storage_area_network "/terms/storage-area-network"
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🧒 Explique como se eu tivesse 5 anos
📁 Imagine a giant hard drive that everyone in your house can use at the same time through the Wi-Fi. It's not plugged into just one computer; it's plugged into the router so your laptop, phone, and TV can all save and share files in one place.
🤓 Expert Deep Dive
Network-Attached Storage (NAS) fundamentally operates as a self-contained file server optimized for storage operations. Architecturally, it comprises a compute module (CPU, RAM, network interface) and a storage subsystem (disk shelves, controllers). The compute module runs a specialized NAS OS (e.g., proprietary Linux-based firmware) that implements file-sharing protocols (SMB/CIFS, NFS, AFP) and manages storage resources. Data access is mediated through these protocols, abstracting the underlying block-level storage from the client. Key features include support for various RAID configurations (RAID 0, 1, 5, 6, 10) for performance and/or redundancy, leveraging techniques like parity calculations or mirroring. Advanced NAS systems incorporate features like thin provisioning, snapshots for point-in-time recovery, data deduplication and compression for storage efficiency, and built-in backup solutions. Performance is often constrained by the network interface (Gigabit Ethernet, 10GbE, etc.), the efficiency of the NAS OS, and the I/O capabilities of the underlying disks. Security is managed through user authentication, access control lists (ACLs), and network security measures (firewalls, encryption). The primary trade-off compared to Storage Area Networks (SANs) is that NAS provides file-level access, whereas SANs offer block-level access, making NAS simpler to manage but potentially less performant for certain high-I/O database workloads.