公开(公告)号：US5263145A

公开(公告)日：1993-11-16

申请号：US528999

申请日：1990-05-24

申请人： James T. Brady ,  Ruth E. Cintron ,  Stephen Goldstein ,  Jean H. Wang Ju ,  Jaishankar M. Menon

发明人： James T. Brady ,  Ruth E. Cintron ,  Stephen Goldstein ,  Jean H. Wang Ju ,  Jaishankar M. Menon

IPC分类号： G06F3/06 ,  G06F11/10 ,  G06F13/42 ,  G11B20/10 ,  G11B20/18 ,  G06F12/02

CPC分类号： G06F11/1076 ,  G06F11/1008 ,  G06F3/0601 ,  G11B20/10 ,  G11B20/1833 ,  G06F2003/0692

摘要： 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 the array.