Patent ID: 9740440
Date: 2017-08-22
CPC Classifications: G06F

Claim:
1. A method, comprising: storing, by a RAID controller, data in a hybrid asymmetric mix of a RAID 1 minor and a parity-based RAID array, wherein a first side of the RAID 1 mirror includes a single data storage device operatively coupled to the RAID controller and storing an operating system image, and wherein a second side of the RAID 1 mirror includes a plurality of data storage devices operatively coupled to the RAID controller and forming the parity-based RAID array; calculating, by the RAID controller, parity using data from both the single data storage device and the plurality of data storage devices; storing, by the RAID controller, the parity only on the plurality of data storage devices; recalculating, by the RAID controller in response to a user command, parity on each of the plurality of data storage devices using a predetermined data pattern for a logical data storage device logically replacing the single data storage device storing the operating system image, wherein the same stripe count is maintained before and after the logical data storage device logically replaces the single data storage device storing the operating system image; storing, by the RAID controller, the recalculated parity on the plurality of data storage devices; and after storing the recalculated parity on each of the plurality of data storage devices, physically disconnecting the single data storage device from the RAID controller without the parity-based RAID array having a loss of redundancy.