n (Logic) an uninterpreted symbolic system whose syntax is precisely defined, and on which a relation of deducibility is defined in purely syntactic terms; a logistic system, (Also called) formal theory, formal calculus Compare â formal language. 1  English Collins Dictionary - English Definition & Thesaurus.
ASM metadata is stored in disk groups â in metadata blocks. Some ASM metadata is at the fixed position in every ASM disk, and is referred to as physically addressed metadata. Other ASM metadata is organised in files (directories) and is referred to as virtually addressed metadata.
Oracle ASM Disks. An Oracle ASM disk is a storage device that is provisioned to an Oracle ASM disk group. An Oracle ASM disk can be a physical disk or partition, a Logical Unit Number (LUN) from a storage array, a logical volume, or a network-attached file.