QNAP 4-BAY 1U Rackmount SATA Jbod Expansion - TL-R400S-US

QNAP TL-R400S-US 4-Bay 1U Rackmount SATA JBOD Expansion

The TL-R400S-US is a shallow-depth 1U rackmount JBOD enclosure that adds four 3.5-inch SATA 6Gb/s drive bays directly to a compatible QNAP NAS, Windows PC, or Ubuntu server via a QXP PCIe host bus adapter card. If your NAS chassis is full and you need raw capacity without migrating to a larger unit, this is the direct-attach path — no network overhead, no new IP address, no NAS license to manage.

Key Features

• Four 3.5-inch SATA Drive Bays: Supports both 3.5-inch 3Gb/s hard disk drives and 2.5-inch SATA 6Gb/s / 3Gb/s solid state drives, giving you flexibility to mix spinning disk for high-capacity bulk storage or SSDs for lower-latency workloads in the same enclosure.
• SATA 6Gb/s Interface: The TL-R400S-US connects to the host via a multi-lane SATA connection through the included QXP PCIe expansion card — meaning the enclosure talks directly to your host's PCIe bus rather than over a network link, keeping latency out of the equation for NAS-attached surveillance recording or archive tiers.
• Redundant Power Supply: A failed PSU in a storage array usually means an emergency window — the built-in redundant power supply on the TL-R400S-US means a single power module failure does not interrupt drive access. For 24/7 surveillance NVR workloads, this is the spec that separates a production-grade expansion shelf from a desktop unit in a rack.
• Shallow 1U Rackmount Form Factor: The short-depth rack design fits in network closets and shallow two-post racks where full-depth 1U units would overhang or not fit at all — useful in retail back-of-house, branch office IDF closets, or any site where rack depth is constrained.
• System Warning Buzzer: An audible alert on drive or system fault means you do not need to be watching a dashboard to know something is wrong — useful in unmanned equipment rooms.
• Kensington Security Slot: Physical lock point for deployments where rack cabinet doors are not an option, such as open racks in a shared colocation cage or a server room with mixed tenants.
• Broad Host Compatibility: Works with QNAP NAS systems, Windows Server and desktop PCs, and Ubuntu-based servers — making it reusable if the host platform changes, and reducing the risk of a single-vendor dead-end investment.

Integration and Compatibility

The TL-R400S-US connects to the host system via the bundled QXP PCIe expansion card, which installs in an available PCIe slot on the host NAS or server. Port 1 on the card maps directly to HDD slots 1 through 4 in the enclosure. This direct-attach architecture means the enclosure shows up as locally attached storage to the host OS — no separate management interface, no IP configuration. On QNAP NAS appliances, the expansion shows up natively in QTS for volume and RAID management. On Windows and Ubuntu hosts, standard OS disk management applies. For integrators building out multi-site NVR-based surveillance storage, this lets you pair a QNAP NAS running surveillance station with direct-attached overflow storage without switching to a larger chassis. Consult the QNAP compatibility list for confirmed NAS models before purchasing — not all QNAP units expose a PCIe slot suitable for the QXP card. When planning JBOD expansion with mixed drive types, note the enclosure supports both 3.5-inch HDDs at 3Gb/s and 2.5-inch SSDs at full SATA 6Gb/s — useful if you want a fast SSD tier in the same 1U slot. Weight net is 10.85 lbs (12.72 lbs gross), so standard 1U rack hardware handles it without issue.

Frequently Asked Questions

Q: What host systems are compatible with the TL-R400S-US?

A: The TL-R400S-US is compatible with QNAP NAS appliances, Windows PCs and servers, and Ubuntu-based systems. Connection is via the included QXP PCIe expansion card installed in an available PCIe slot on the host. Verify that your QNAP NAS model has a compatible PCIe slot before ordering.

Q: Does the TL-R400S-US include drives?

A: No. The TL-R400S-US is a drive enclosure only. It accepts up to four 3.5-inch SATA HDDs (3Gb/s) or 2.5-inch SATA SSDs (6Gb/s or 3Gb/s), which must be purchased separately.

Q: What is the interface speed of the TL-R400S-US?

A: The enclosure uses SATA 6Gb/s connectivity via a multi-lane SATA interface through the bundled QXP PCIe host adapter card. Individual drive slots support SATA 6Gb/s for 2.5-inch SSDs and SATA 3Gb/s for 3.5-inch HDDs.

Q: Does the TL-R400S-US have a redundant power supply?

A: Yes. The TL-R400S-US ships with a redundant power supply, which means a single PSU failure does not interrupt access to the drives — important for 24/7 recording and storage workloads.

Q: Can the TL-R400S-US be used as a standalone NAS or NVR?

A: No. The TL-R400S-US is a JBOD expansion enclosure — it has no built-in compute, NAS OS, or network interface. It must be connected to a compatible host via the QXP PCIe card and managed through the host system's storage software.

Q: How much does the TL-R400S-US weigh?

A: Net weight is 10.85 lbs; gross (packaged) weight is 12.72 lbs. Standard 1U rack hardware is sufficient for installation.