The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 28, 2001
Filed:
Oct. 26, 1998
Shah Mohammad Rezaul Islam, Cary, NC (US);
Bharatkumar Jayantilal Oza, Apex, NC (US);
Philip Anthony Richardson, Cary, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method for migrating data from one level of RAID system to the same or another level of RAID system having the same or a different number of removable and identifiable storage devices and having the same or a different stripe unit size is disclosed. The storage devices can be attached to the system at a number of different attachment points which facilitates replacement or removal of a failed device. The system is represented as a logical media drive. After determining the number of migrations and the direction of migration, a start logical block address and an end logical block address is defined. The migration is performed by moving data from the source physical blocks to the destination physical blocks starting with the physical block corresponding to the start logical block address and continuing to the physical block corresponding to the end logical block address.