Capacity-optimised all-flash — high-density NVMe QLC SSDs at the economics of spinning disk
The NetApp AFF C400 is a capacity-optimised all-flash storage system built on high-density NVMe QLC SSDs. Delivering 141 PB effective capacity at scale, it replaces high-capacity spinning disk at all-flash performance — ideal for secondary workloads, backup targets, analytics, and large file repositories.
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The AFF C400 uses NVMe Quad-Level Cell (QLC) SSDs — the highest-density flash technology available. QLC drives store 4 bits per cell compared to TLC's 3, delivering up to 3× more raw capacity per drive. Combined with ONTAP's inline deduplication and compression, the AFF C400 achieves spinning-disk economics at all-flash performance — making flash viable for capacity-intensive workloads previously limited to HDDs.
Despite QLC's capacity focus, the AFF C400 delivers all-flash performance for block and file workloads — with NVMe/TCP, NVMe/FC, NFS, SMB, and S3 protocol support. Applications see consistent sub-millisecond latency whether accessing data over NVMe, iSCSI, or NFS, providing a single platform for diverse workload consolidation.
Running ONTAP 9.12.1 or later, the AFF C400 has access to the complete ONTAP data management portfolio — inline deduplication and compression, SnapMirror replication, SnapLock Compliance, FabricPool tiering, FlexGroup for large unstructured data, and Autonomous Ransomware Protection. Same data management, different capacity economics.
Scale from a single AFF C400 HA pair to 24 nodes for a unified NAS namespace with 141 PB effective capacity — supporting large unstructured data repositories, backup consolidation targets, and analytics data lakes that outgrow traditional spinning-disk NAS at a fraction of the operational complexity.
SnapMirror replication from AFF C400 to AFF A-Series (or vice versa) provides tiered storage topologies where primary workloads run on performance-tier A-Series while secondary data resides on capacity-tier C-Series. SnapMirror to Cloud extends replication to AWS, Azure, or StorageGRID for long-term retention.
ONTAP Autonomous Ransomware Protection detects ransomware on the AFF C400 in real time, creating automatic immutable recovery snapshots. NetApp's Ransomware Recovery Guarantee provides the same assurance as premium A-Series systems — protecting backup data and secondary repositories from encryption-based ransomware attacks.
The NetApp AFF C400 is a capacity-optimised all-flash storage system that bridges the gap between expensive performance flash and cost-effective spinning disk. Built on high-density NVMe QLC SSDs, the C400 delivers the economics of high-capacity disk arrays at all-flash performance and with full ONTAP data management intelligence.
QLC technology stores 4 bits per flash cell — achieving the highest available flash density at the lowest cost per gigabyte. The AFF C400's 4U chassis with 24 internal SSD slots, expandable via NS224 external shelves, reaches 1,152 SSDs per cluster and 141 PB effective capacity across 24 nodes. This makes the C400 the natural replacement for large HDD-based NAS systems requiring all-flash upgrade without the premium of TLC-based performance arrays.
Running ONTAP 9.12.1, the AFF C400 provides the full suite of NetApp data services — inline deduplication and compression (typical 4:1 capacity efficiency), SnapMirror replication, SnapLock Compliance for regulatory retention, FabricPool for automatic cold-data tiering to object storage, and ONTAP Autonomous Ransomware Protection to detect and protect against encryption-based attacks on secondary data.
Common deployments include consolidated backup and replication targets (replacing VTL and tape), secondary storage for database cloning and analytics, large unstructured NAS data repositories for genomics, media, and surveillance, and long-term regulatory data retention at flash speed and simplicity.
Replace VTL, tape, and spinning-disk backup targets with an AFF C400 — providing all-flash restore speeds at capacity-tier economics. ONTAP SnapLock Compliance creates immutable backup retention copies meeting regulatory requirements.
QLC-based capacity at flash speed enables S3 object and NFS file access to large analytics datasets — providing consistent low-latency reads for Hadoop, Spark, and data lake workloads without the performance variability of spinning disk.
Replace aging large-capacity NAS systems with an AFF C400 cluster — supporting 141 PB NFS/SMB file namespaces for genomics, medical imaging, seismic data, media, and archival repositories at all-flash performance and without HDD failure management.
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