Storage glossary

Lexicographic entries for magnetic, flash, tape, and interface technologies. Definitions live in JSON; this site is a thin human view.

Agents: start with llms.txt and/data/index.json (238 terms).

Terms

• 3D NAND · 3d-nand
• 3D XPoint · 3d-xpoint
• 4Kn native sectors · 4kn-native
• 512e emulation · 512e
• Advanced Format (4K) · advanced-format
• AHCI · ahci
• Air-gapped backup · air-gap-backup
• All-flash array · all-flash-array
• ALUA · alua
• Annualized failure rate (AFR) · afr
• Areal density · areal-density
• ATA SMART · ata-smart
• Bad block management · bad-block-management
• Barium ferrite tape · barium-ferrite-tape
• Bit error rate · bit-error-rate
• Bit-patterned media · bit-patterned-media
• Block storage · block-storage
• Blu-ray data archive · blu-ray-archive
• Bubble memory · bubble-memory
• Byte-addressable storage · byte-addressable-storage
• CFexpress · cfexpress
• Charge trap flash · charge-trap-flash
• CKD DASD · count-key-data
• Cold archive tier · cold-archive
• Computational storage drive · computational-storage
• Consumer SSD · consumer-ssd
• Conventional magnetic recording (CMR) · cmr
• Copy-on-write (storage) · copy-on-write
• CXL memory expansion · cxl-memory
• DAT cartridge · dat-cartridge
• Data deduplication · deduplication
• Data sanitization · data-sanitization
• Degaussing · degaussing
• Device-managed SMR (DM-SMR) · device-managed-smr
• Direct I/O · direct-io
• DISCARD / UNMAP · discard
• Disk shelf · disk-shelf
• DLT · dlt
• Drum memory · drum-memory
• Dual-actuator HDD · dual-actuator
• Dual-port drive · dual-port
• DWPD · dwpd
• E1.S · e1-s
• EDSFF · edsff
• End-to-end data protection · end-to-end-data-protection
• Enterprise SSD · enterprise-ssd
• Erasure coding · erasure-coding
• ESCON · escon
• ESDI · esdi
• FCoE · fcoe
• Fibre Channel · fibre-channel
• FICON · ficon
• File storage · file-storage
• Fixed block architecture · fixed-block-architecture
• Flash data retention · data-retention
• Flash module · flash-module
• Flash translation layer (FTL) · ftl
• Floating-gate flash · floating-gate
• Floppy disk · floppy-disk
• Fluid dynamic bearing · fluid-dynamic-bearing
• Garbage collection (flash) · garbage-collection
• Glass platter substrate · glass-substrate
• Glass storage · glass-storage
• GMR read head · giant-magnetoresistive-head
• Hard disk drive (HDD) · hdd
• Heat-assisted magnetic recording (HAMR) · hamr
• Helical scan recording · helical-scan
• Helium leak port · helium-leak-port
• Helium-filled HDD · helium-hdd
• Holographic data storage · holographic-storage
• Host bus adapter (HBA) · hba
• Host memory buffer (HMB) · hmb
• Host-managed band (SMR) · host-managed-band
• Host-managed SMR (HM-SMR) · hm-smr
• Host-side flash GC · garbage-collection-host
• Hot storage tier · hot-storage
• Hot, warm, and cold storage tiers · hot-warm-cold
• Hybrid flash array · hybrid-flash-array
• IBM RAMAC · ramac
• IDE / ATA · ide
• INCITS T10 SCSI · t10-scsi
• Intel Optane · optane
• IOPS · iops
• iSCSI · iscsi
• JBOD · jbod
• JEDEC SSD standards · jedec-solid-state
• Key-value SSD · key-value-ssd
• LDPC (NAND ECC) · ldpc
• Logical unit (LUN) · logical-unit-number
• Longitudinal magnetic recording · longitudinal-recording
• LTFS · ltfs
• LTO (Linear Tape-Open) · lto
• LVM · lvm
• M-DISC · m-disc
• M.2 · m2
• Magnetic tape storage · tape
• Magneto-optical disc · magneto-optical
• Mainframe DASD · mainframe-dasd
• Memristor storage · memristor
• Metal particle tape · metal-particle-tape
• Microwave-assisted magnetic recording (MAMR) · mamr
• Mirroring (storage) · mirroring
• Mission-critical HDD · mission-critical-hdd
• MLC SSD · mlc-ssd
• MTBF · mtbf
• Multi-level cell (MLC) · mlc
• Multipath I/O · multipath-io
• NAND channel · channel-nand
• NAND die stacking · die-stacking
• NAND flash · nand-flash
• NAS · nas
• Nearline HDD · nearline-hdd
• Nearline SAS · nearline-sas
• NFS · nfs-storage
• NOR flash · nor-flash
• NVDIMM-N · nvdimm-n
• NVM subsystem · nvm-subsystem
• NVMe · nvme
• NVMe backplane · nvme-backplane
• NVMe base specification · nvme-base-spec
• NVMe FDP · nvme-fdp
• NVMe multipath · multipath-nvme
• NVMe namespace · namespace-nvme
• NVMe over Fabrics · nvme-of
• NVMe sanitize · sanitize-nvme
• NVMe SMART log · nvme-smart-log
• NVMe-MI · nvme-mi
• Object storage · object-storage
• Open-channel SSD · open-channel-ssd
• Optical archival storage · optical-archival
• Optical jukebox · optical-jukebox
• Over-provisioning · over-provisioning
• Parity RAID · parity-raid
• Partition alignment · partition-alignment
• PATA · pata
• PCIe 4.0 storage · pcie-gen4
• PCIe 5.0 storage · pcie-gen5
• PCIe lanes (storage) · pcie-lanes
• PCIe retimer · pcie-retimer
• PCIe storage attachment · pcie-storage
• Perpendicular magnetic recording (PMR) · pmr
• Perpendicular magnetic tape · perpendicular-tape
• Persistent memory · persistent-memory
• Phase-change memory (storage) · phase-change-memory
• Planar NAND · planar-nand
• PLC (penta-level cell) · plc
• Power loss protection · power-loss-protection
• PRML detection · prml-encoding
• Program/erase cycle · program-erase-cycle
• Protection information (PI) · protection-information
• QLC SSD · qlc-ssd
• Quad-level cell (QLC) · qlc
• Queue depth · queue-depth
• Racetrack memory · racetrack-memory
• RAID · raid
• RAID 10 · raid-10
• RAID 5 · raid-5
• RAID 6 · raid-6
• RDMA storage networking · rdma-storage
• Read disturb · read-disturb
• Read-modify-write · read-modify-write
• Reed–Solomon codes (storage) · reed-solomon-code
• Reflink · reflink
• Robotic tape loader · robotic-tape
• Rotational latency · rotational-latency
• Rotational media · rotational-media
• Rotational vibration (RV) · rotational-vibration
• Run-length limited (RLL) encoding · run-length-limited
• S.M.A.R.T. · smart
• SAN · san
• SAS expander · sas-expander
• SATA Express · sata-express
• SCSI · scsi
• SCSI initiator and target · initiator-target
• SCSI UNMAP · scsi-unmap
• SD Express · sd-express
• Secure erase · secure-erase
• Seek time · seek-time
• Self-encrypting drive (SED) · self-encrypting-drive
• Serial ATA (SATA) · sata
• Serial Attached SCSI (SAS) · sas
• Shingled band · shingled-band
• Shingled magnetic recording (SMR) · smr
• Single-level cell (SLC) · slc
• SLC cache · slc-cache
• SLC SSD · slc-ssd
• SMB file sharing · smb-protocol
• SMR garbage collection · garbage-collection-smr
• SNIA · snia-storage
• Solid-state drive (SSD) · ssd
• Solid-state media · solid-state-media
• SSD controller · flash-controller
• SSD DRAM cache · dram-cache-ssd
• SSD thermal throttling · thermal-throttling-ssd
• SSHD (hybrid drive) · sshd
• ST-412 · st-412
• ST-506 interface · st-506
• Storage immutability · immutability-storage
• Storage latency · latency-storage
• Storage snapshot · snapshot
• Storage throughput · throughput-storage
• Storage virtualization · storage-virtualization
• Storage-class memory (SCM) · storage-class-memory
• Striping (storage) · striping
• Superparamagnetic limit · superparamagnetic-limit
• Tape encryption · tape-encryption
• Tape library · tape-library
• TBW · tbw
• TCG Opal · tcg-opal
• Thin provisioning · thin-provisioning
• Thunderbolt storage · thunderbolt-storage
• Tiled magnetic recording · tiled-media
• TLC SSD · tlc-ssd
• TMR read head · tunnel-magnetoresistive-head
• TRIM · trim
• Triple-level cell (TLC) · tlc
• U.2 / U.3 · u2
• UASP · uasp
• UDO · udo
• UNMAP · unmap
• USB mass storage · usb-mass-storage
• V-NAND · v-nand
• Volume manager · volume-manager
• Warm storage tier · warm-storage
• Wear leveling · wear-leveling
• Winchester disk architecture · winchester-architecture
• WORM storage · worm-storage
• Write amplification · write-amplification
• Write combining · write-combining
• Write-back cache · write-back-cache
• Write-once media · write-once-media
• Write-through cache · write-through-cache
• ZAC · zac
• ZBC · zbc
• Zip drive · zip-drive
• Zoned block device (ZBD) · zoned-block-device
• Zoned namespace · zoned-namespace
• Zoned namespaces (ZNS) · zns