{
  "status": "shipping",
  "advantages": [],
  "limitations": [],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "updated": "2026-10-17",
  "slug": "ufs",
  "term": "UFS (Universal Flash Storage)",
  "aliases": [
    "Universal Flash Storage"
  ],
  "definition": "UFS is a JEDEC flash-storage specification with a serial interface and a layered architecture using MIPI M-PHY, MIPI UniPro and SCSI command conventions.",
  "note": "Embedded UFS devices combine flash memory and a controller; they are managed storage rather than a direct raw-NAND interface. KIOXIA documents a serial interface and full-duplex support for its UFS devices. These are interface properties, not a guaranteed application throughput result. [ufs-device]\n\nThe Linux architecture overview describes SCSI commands transported in UFS protocol information units, with UniPro and M-PHY below them. Shared SCSI concepts do not make UFS a SAS connection or an NVMe device. Its historical version-specific speed examples are not a current specification inventory. [ufs-linux]\n\nUFS and eMMC are not NAND cell types. Compare the implemented host and device interface, actual workload and recovery contract separately; the paired guide explains these boundaries. [analysis]",
  "related": [
    "emmc",
    "rpmb",
    "nand-flash",
    "ftl",
    "t10-scsi",
    "nvme"
  ],
  "citations": [
    {
      "id": "ufs-linux",
      "title": "Linux kernel documentation: Universal Flash Storage, architecture overview",
      "url": "https://docs.kernel.org/scsi/ufs.html",
      "accessed": "2026-10-17"
    },
    {
      "id": "ufs-device",
      "title": "KIOXIA: UFS for consumer and industrial applications, integrated controller and serial interface",
      "url": "https://europe.kioxia.com/en-europe/business/memory/ufs/other.html",
      "accessed": "2026-10-17"
    },
    {
      "id": "analysis",
      "title": "Hesela: eMMC, UFS and RPMB: interface, boot and security boundaries",
      "url": "https://hesela.com/analyses/emmc-ufs-rpmb-boundaries/",
      "accessed": "2026-10-17"
    }
  ]
}