NETGEAR RTRAY04-10000S ReadyNAS Disk Tray 3220/4220

We've deployed and maintained ReadyNAS 3220/4220 systems across a range of mid-market sites—file serving, backup consolidation, and virtualization offload are the bread-and-butter use cases. The RTRAY04-10000S is the component you order when a drive tray has mechanically failed, a SAS connector shows intermittent disconnects, or you're scaling capacity within the existing 3220/4220 enclosure. The real operational difference between speccing this replacement versus an entire new NAS head unit is both capital and operational: you preserve the management context (ReadyCLOUD pairing, replication jobs, snapshot policies) and avoid re-cabling and IP reconfiguration. What sets this tray apart from generic third-party replacements is hardware certification—ReadyNAS firmware maintains an internal device table that maps tray serial numbers to drive pools, and non-Netgear trays either fail that validation or introduce electrical timing skew that causes intermittent SAS bus resets. We've seen shops source gray-market trays to save $500, then spend 40 labor hours troubleshooting phantom drive disconnections. Not worth it.

Technical Highlights:

• Hot-Swappable SAS Interface: The tray integrates dual SAS connectors and power headers that allow drive replacement without system shutdown. In our experience, this is the feature that distinguishes it from static mechanical frames—downtime cost on a 24/7 backup or virtualization storage appliance is measured in hundreds of dollars per hour, so the ability to swap a failed drive in <5 minutes is not a convenience, it's a business requirement.
• X-RAID Awareness: ReadyNAS OS 6 firmware dynamically optimizes drive-level RAID protection when a tray is installed or replaced. The tray itself is transparent to this process, but proper seating and electrical connectivity are critical—loose SAS connectors cause the OS to mark drives offline and trigger unnecessary RAID rebuild cycles. Always verify audible click engagement on both SAS headers.
• 10GbE-Class NAS Context: The 3220 and 4220 are built around 10 Gigabit Ethernet backhaul. Drive-tier I/O performance (SAS 6Gb or 12Gb) is matched to network uplink capacity. If you're upgrading the tray but leaving legacy Gigabit Ethernet switches in place, you've removed a hardware bottleneck without unlocking network-side bandwidth. That's a deployment gotcha worth knowing before sign-off.
• VMware Certification Preservation: Tray replacement does not invalidate vSphere integration or require datastore re-mount cycles. VAAI (vStorage APIs for Array Integration) continues to function across ReadyNAS iSCSI LUNs. If you're using snapshots for VM backup, replacement of the tray does not interrupt those jobs.
• ReadyCLOUD Continuity: Cloud replication and sync policies are tied to the NAS head unit, not individual trays. Replacement of this tray does not require re-pairing with AWS, Azure, or Google Cloud endpoints. This is particularly valuable for organizations running multi-site backup or hybrid-cloud strategies where interrupting replication can mean SLA violations.
• Firmware Independence: The RTRAY04-10000S does not require firmware updates. It's a passive mechanical and electrical component. Contrast this with some competing NAS brands that tie tray revision levels to OS kernel versions—this simplicity reduces long-term maintenance overhead.

Deployment Considerations:

• Verify the ReadyNAS model number is 3220 or 4220 before ordering. This tray is not backward-compatible with RR3312, RR4312X, or other ReadyNAS series. Cross-check the chassis serial number and datasheet to avoid costly return cycles.
• Power off the NAS and allow 2–3 minutes for SAS port negotiation after installation before provisioning new drives. Powering on and immediately inserting drives into a cold tray can trigger transient SAS bus timeouts. This is rare but documented in post-install troubleshooting logs.
• If the system includes an optional RRSASEXP-10000S SAS expansion card, verify the expansion card is initialized and visible in the ReadyNAS web UI before attempting to add drives to the new tray. Drives added to an uninitialized expansion card will appear offline until the card is properly enumerated by the kernel.
• ReadyNAS OS 6 snapshots and replication jobs continue uninterrupted during tray installation. However, if the system is actively performing a RAID rebuild (from a previous drive failure), adding a new tray will cause the OS to re-evaluate RAID layout. Avoid tray installation during active RAID rebuild cycles to minimize rebuild time and disk I/O contention.
• The 550W shared PSU supports up to four trays with typical 3.5-inch nearline drives (12W–15W per drive). If scaling to SSD-based drives or high-capacity NL-SAS units, confirm power headroom before ordering. Large-scale capacity upgrades may require PSU upgrade or a second NAS head unit.

The RTRAY04-10000S is the right choice for organizations already running ReadyNAS 3220/4220 systems and facing component-level failures or planned capacity expansion. It eliminates the cost and operational overhead of replacing the entire NAS head unit, preserves all existing replication and backup policies, and integrates transparently with VMware, Hyper-V, and cloud backup workflows. For new deployments or organizations evaluating NAS platforms for the first time, consult the Netgear catalog to compare ReadyNAS models and determine the right head unit for your capacity and performance requirements.