The ASUSTOR LOCKERSTOR 4RS (AS6504RS) is a 1U rack-mount, business-ready 4-bay NAS solution designed for small to medium enterprises, remote offices and high-availability storage environments. At its heart sits a quad-core Intel® Atom® C3538 processor (2.1 GHz) paired with 8 GB DDR4-2133 installed memory (expandable up to 128 GB) — giving the system robust compute power for multi-user file services, virtualization, iSCSI and networked backup workflows.
The enclosure offers four front-accessible SATA 6 Gb/s bays for 3.5″ or 2.5″ HDDs/SSDs, enabling substantial internal storage (up to ~72 TB with 4×18 TB drives) and further expansion via optional expansion units (up to 20 bay total) for growing capacity needs.
Connectivity is enterprise-grade: it includes two Gigabit Ethernet ports plus two 2.5 GbE ports for link-aggregation up to 5 Gb/s, alongside a PCIe 3.0 x8 (x4 link) slot for future 10 GbE add-in cards. Running ASUSTOR’s ADM operating system, the LOCKERSTOR 4RS brings enterprise features such as iSCSI/IP-SAN support, VMware/Hyper-V compatibility, snapshot backup, MyArchive cold-storage, and mobile remote access.
In a 44 mm height 1U rack form-factor (439 × 515 mm footprint) this NAS delivers rack-ready performance, redundancy options, and advanced networking — all in compact form.
✅ Key Features
Quad-Core Intel Atom C3538 2.1 GHz: Delivers strong multitasking and virtualization support in a 1U rackmount form.
8 GB DDR4–2133 Memory Installed (expandable to 128 GB): High memory ceiling for demanding workloads and multiple users.
4 Hot-Swappable SATA Bays (3.5″/2.5″ HDD/SSD): Flexible storage options from high-capacity HDDs to SSDs.
Dual 2.5 GbE + Dual 1 GbE Ports with Link Aggregation: Up to 5 Gb/s aggregated throughput for faster file access.
PCIe Expansion (10 GbE-Ready): Allows adding high-speed networking or SSD caching.
Enterprise-Class Software & Features: iSCSI, IP-SAN, virtualization compatibility, snapshot backups, MyArchive cold storage, mobile management tools.
✅ Why Buy This Product
If you need a NAS that goes beyond simple file storage and into enterprise-capable territory without going full rack-blade, the LOCKERSTOR 4RS is a compelling choice. It offers strong hardware for virtualization and multi-user access, fast networking with 2.5 GbE ports (rare in this category), and future-proofing via PCIe expansion. The large memory ceiling and robust operating system (ADM) make it ideal for small businesses that want centralized backups, file sharing, remote access, virtualization support, and SAN functionality. Because it’s rack-mount 1U, it fits seamlessly into server racks or data closets. For organisations looking to consolidate data, provide shared services, or scale storage without stepping into high-end enterprise SAN territory, this model gives exceptional value and flexibility.
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