bad block

English Thesaurus

1. (computer science) a block (usually one sector) that cannot reliably hold data (noun.quantity)

hypernym	:	block,
definition	:	(computer science) a sector or group of sectors that function as the smallest data unit permitted (noun.quantity)

domain category	:	computer science, computing,
definition	:	the branch of engineering science that studies (with the aid of computers) computable processes and structures (noun.cognition)