Method and apparatus for formatting data on DASD arrays
摘要
Described is a method and means for managing access to a logical track of KN blocks of which K are parity blocks. The KN blocks are distributed and stored in an array of N DASDs having K blocks per physical track per DASD. The array includes control means for securing synchronous access to selectable ones of the DASDs responsive to each access request. The method involves (a) formatting the blocks onto the array using a row major order modulus as the metric for balancing the data rate and concurrency (the number of DASDs bound per access) and (b) executing the random sequences of large and small access requests over array. <IMAGE>
申请公布号
EP0458554(B1)
申请公布日期
1997.08.13
申请号
EP19910304503
申请日期
1991.05.20
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
BRADY, JAMES THOMAS;CINTRON, RUTH ENID;GOLDSTEIN, STEPHEN;JU, JEAN HO-MING WANG;MENON, JAISHANKAR MOOTHEDATH