The filerelative address of a block on a mass storage device. The first block in a file is always virtual block 1.; 海量存儲(chǔ)器上一個(gè)文件內(nèi)數(shù)據(jù)塊的相對(duì)地址。一個(gè)文件中的第一塊的虛擬塊號(hào)總是為1。 對(duì)照l(shuí)ogical block number, physical block number。