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4-bay NAS systems
These NAS systems list 4 drive bays. Four bays are a common step up for RAID 5 or RAID 10, but the bay count does not tell you usable capacity, Ethernet speed, or which drives are supported. Use the filters for listed Ethernet class. RAID is not a backup. Check form factor and interface before you buy disks.
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How Many Drive Bays Do You Need in a NAS?
Choose NAS drive bays by starting with usable capacity—not raw disk capacity—and then allowing for RAID, filesystem overhead, free space, backups, and future growth. This guide compares 2-bay, 4-bay, 6-bay, and larger NAS systems.
Read guideNAS Storage Calculator: How to Estimate Usable Capacity
Estimate NAS capacity from drive count and size by separating raw storage, RAID or parity, filesystem overhead, and free-space headroom. A worked example shows how much space you can realistically plan to use.
Read guideRelated glossary
RAID
RAID combines multiple drives to improve capacity, performance, or resilience through striping, mirroring, or parity. It is redundancy, not a backup.
Open termRAID 1
RAID 1 mirrors data across two drives, so one drive can fail without immediately making the data unavailable. It reduces usable capacity and is not a substitute for a backup.
Open termSMR
SMR (shingled magnetic recording) overlaps data tracks to increase storage density. This can make some random-write workloads and rebuilds more involved than with conventional magnetic recording.
Open termMore in this catalog
2-bay NAS systems
Browse NAS enclosures listed with 2 drive bays. Bay count is not usable capacity or a backup plan.
Browse8-bay NAS systems
Browse NAS enclosures listed with 8 drive bays. More bays are not automatically faster or safer storage.
BrowseNAS systems listed with 2.5 GbE
Browse NAS systems whose listed Ethernet class is 2.5 GbE. That is a port-speed class, not measured throughput.
Browse8 TB internal hard drives
Browse internal HDDs listed at 8 TB. Capacity is not NAS certification, CMR/SMR, or interface.
Browse1 TB internal SSDs
Browse internal SSDs listed at 1 TB. Capacity is not NVMe, endurance, or NAS cache suitability.
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