OpenMetal Storage Large v4 Capacity

Q: How much storage does the OpenMetal Storage Large v4 provide?

The Storage Large v4 provides 240 TB of raw HDD capacity (12x 20 TB SATA drives) plus 25.6 TB of NVMe cache (4x 6.4 TB Micron 7500 MAX), with dedicated boot drives separate from both tiers.

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Storage is organized in three tiers. The boot tier uses two 960 GB SSDs in RAID 1 for OS redundancy, isolated from all data operations. The NVMe cache tier (4x 6.4 TB Micron 7500 MAX) handles Ceph BlueStore WAL, DB metadata, and hot-data caching with 1.1 million random read IOPS and sub-1ms QoS per drive. The HDD bulk tier (12x 20 TB SATA) stores cold and warm data for Ceph OSD operations, archival, media, and compliance retention.

Usable capacity depends on Ceph replication factor. With the default 3x replication across a 3-node storage cluster (720 TB raw total), usable capacity is approximately 240 TB. In a mixed compute + storage deployment (3x Large v4 compute + 2x Storage Large v4), the cluster provides 480 TB raw HDD with 51.2 TB NVMe cache. The chassis supports up to 12 HDD bays, all populated in the base configuration, so capacity expansion requires adding additional Storage Large v4 nodes to the cluster.