公开(公告)号：BR9202158A

公开(公告)日：1993-02-02

申请号：BR9202158

申请日：1992-06-05

Applicant: IBM

Inventor： NG SPENCER WAH-FUNG ,  PALMER DAVID W ,  THOMPSON RICHARD S

IPC: G06F3/06 ,  G06F11/00 ,  G06F11/10 ,  G11B20/18

Abstract: Fault tolerance in a redundant array 13 of disk drives 20, 21, 22, 23, 24 is degraded when errors exist in the array. Data in the array is rebuilt to remove the degradation, either for entire disk drives or for partial data, with minimal impact on array resources. Rebuilding occurs during idle time of the array or is interleaved between current data area accessing operations of the array at a rate which is inversely proportional to the activity level of the array. Alternatively, data is rebuilt when a data area being accessed is in need of rebuilding.

公开(公告)号：CA2066154C

公开(公告)日：1996-01-02

申请号：CA2066154

申请日：1992-04-15

Applicant: IBM

Inventor： NG SPENCER W ,  PALMER DAVID W ,  THOMPSON RICHARD S

IPC: G06F3/06 ,  G06F11/00 ,  G06F11/10 ,  G11B20/18 ,  G06F11/16

Abstract: Fault tolerance in a redundant array of disk drives is degraded when error conditions exist in the array. Several methods for rebuilding data of the array to remove the degradation are described. Data rebuilding for entire disk drives and partial data rebuilds of disk drives are described. All rebuild methods tend to reduce the negative affect of using array resources for the data rebuild. In one method rebuilding occurs during idle time of the array. In a second method rebuilding is interleaved between current data area accessing operations of the array at a rate which is inversely proportional to activity level of the array. In a third method, the data are rebuilt when a data area being accessed is a data area needing rebuilding.

公开(公告)号：CA2066154A1

公开(公告)日：1992-12-19

申请号：CA2066154

申请日：1992-04-15

Applicant: IBM

Inventor： NG SPENCER W ,  PALMER DAVID W ,  THOMPSON RICHARD S

IPC: G06F3/06 ,  G06F11/00 ,  G06F11/10 ,  G11B20/18

Abstract: Fault tolerance in a redundant array 13 of disk drives 20, 21, 22, 23, 24 is degraded when errors exist in the array. Data in the array is rebuilt to remove the degradation, either for entire disk drives or for partial data, with minimal impact on array resources. Rebuilding occurs during idle time of the array or is interleaved between current data area accessing operations of the array at a rate which is inversely proportional to the activity level of the array. Alternatively, data is rebuilt when a data area being accessed is in need of rebuilding.