3D NAND
3D NAND – Three dimensional NAND is a flash chip built so that it scales in width, length and height. Originally NAND scaled in just two dimensions – width...
3-2-1 Rule
3-2-1 Rule – The storing of a backup in three separate places to ensure one of the versions can be used to recover the backed up data in case...
Storage Glossary
This is a storage glossary with entries (terms) linked to explanations. It is more than a storage dictionary but not a storage encyclopaedia. New terms will be added as...
MAID
MAID - Massive Array of Idle Disks to store persistent but little-used data on mostly spun-down disks. Envisage a disk array with a cache of spinning drives and a...
OEM
OEM - Opto-Electronic Memory. These are devices that use light - visible, ultra-violet or infra-red - signals and properties to store and retrieve data. They feature optical-to-electrical and electrical-to-optical...
Merkle Tree
Merkle Tree - a hierarchy of blocks starting from data blocks at the bottom and progressing upwards to the root with a set of hash blocks. Hashes are unique...
RAG
RAG (Retrieval Augmented Generation) is a technique for enhancing the accuracy and reliability of generative AI models with facts fetched from external sources. An Nvidia blog says RAG: "...
3-2-1-1-0
3-2-1-1-0 is a backup arrangement that is an advance on the original 3-2-1 strategy. The numbers stand for;
3 – Keep at least 3 copies of data
2 – On at...
CFDP
CDFP – CDFP is short for 400 (CD in Roman numerals) Form-factor Pluggable, and designed to provide a low cost, high density 400 Gigabit Ethernet connection.
OSFP MSA
OSFP MSA – Octal Small Form Factor Pluggable (OSFP) Multi Source Agreement (MSA). The OSFP (x8) and its denser OSFP-XD (x16) variants both support the latest signaling rate of 224G...
QSFP
QSFP – Quad Small Form-factor Pluggable standard referring to transceivers for optical fiber or copper cabling, and providing speeds four times their corresponding SFP (Small Form-factor Pluggable) standard. The QSFP28...
HSMR
HSMR - Hybrid Shingled Magnetic Media Recording disk drives. Hybrid SMR drives have both a conventional non-shingled magnetic recording (Conventional PMR or CMR) region and an SMR region. HSMR...