公开(公告)号：CA2042872C

公开(公告)日：1995-08-15

申请号：CA2042872

申请日：1991-05-17

Applicant: IBM

Inventor： BRADY JAMES THOMAS ,  CINTRON RUTH ENID ,  GOLDSTEIN STEPHEN ,  JU JEAN HO-MING WANG ,  MENON JAISHANKAR MOOTHEDATH

IPC: G06F3/06 ,  G06F11/10 ,  G06F13/42 ,  G11B20/10 ,  G11B20/18 ,  G06F13/40

Abstract: 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.

公开(公告)号：DE69127229T2

公开(公告)日：1998-02-12

申请号：DE69127229

申请日：1991-05-20

Applicant: IBM

Inventor： BRADY JAMES THOMAS ,  CINTRON RUTH ENID ,  GOLDSTEIN STEPHEN ,  JU JEAN HO-MING WANG ,  MENON JAISHANKAR MOOTHEDATH

IPC: G06F3/06 ,  G06F11/10 ,  G06F13/42 ,  G11B20/10 ,  G11B20/18

Abstract: 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.

公开(公告)号：DE69127229D1

公开(公告)日：1997-09-18

申请号：DE69127229

申请日：1991-05-20

Applicant: IBM

Inventor： BRADY JAMES THOMAS ,  CINTRON RUTH ENID ,  GOLDSTEIN STEPHEN ,  JU JEAN HO-MING WANG ,  MENON JAISHANKAR MOOTHEDATH

IPC: G06F3/06 ,  G06F11/10 ,  G06F13/42 ,  G11B20/10 ,  G11B20/18

Abstract: 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.