Methods and structure for multi-drive mirroring in a...

Details Methods and structure for multi-drive mirroring in a... Methods and structure for multi-drive mirroring in a...

2005-08-23

2005-08-23

Lane, Jack A. (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S157000

Reexamination Certificate

active

06934803

ABSTRACT:
Methods and associated structure for mapping of data stripes and stripes in a RAID level1E storage subsystem such that associated stripes of multiple physical stripes are physically contiguous. This mapping eliminates the need for duplicative reading (or writing) of stripes unrelated to the underlying I/O request performed to reduce the total number of I/O requests. This mapping also serves to limit the number of I/O requests required to read multiple stripes to the number of disk drives in the array and the number required to write multiple stripes and their corresponding mirrors to twice the number of disk drives in the array. The effects of this mapping therefore simplify RAID level1E management in RAID controller with constrained memory and processing resources.

REFERENCES:
patent: 6304941 (2001-10-01), Lyons et al.
patent: 2002/0194530 (2002-12-01), Santeler et al.
patent: 2003/0070043 (2003-04-01), Merkey
IBM Corporation, “IBM Netfinity RAID Technology”, 1999, pp. 1-15 IBM Personal Computer Company, Department L06A, 3039 Cornwallis Road Research Triangle Park, NC 27709.
ServeRAID-4 Ultra 160 SCSI Controllers; IBM Corp., Apr. 2000.
IBM Netfinity ServeRAID-3HB and -3L Ultra2 SCSI Adapters; IBM Corp., Apr. 2000.

Affiliated with

Also associated with

Rating

Methods and structure for multi-drive mirroring in a... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods and structure for multi-drive mirroring in a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and structure for multi-drive mirroring in a... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3506264