Disk array controller with reconfigurable data path

G - Physics – 06 – F

Patent

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G06F 3/06 (2006.01)

Patent

CA 2522915

A disk array controller apparatus (10) is disclosed having at least two logical ports (Logical Port #0-Logical Port #3) for interfacing with a host (12) and having one or more physical ports (Physical Port #0 - Physical Port #4), each physical port arranged for attaching at least one disk drive to the controller, and the controller including a switch (26), said switch providing dynamically configurable data paths (30) between the logical data ports and physical data ports, responsive to the contents of a Mapping Register (24). The Mapping Register defines a desired array disk drive array by specifying an association of each logical port to one of the physical ports. The mapping register can be organized as a logical mapping register, comprising a field for each logical port of the controller, and includes provision for designating a redundant array for RAID operations.

Cette invention concerne un dispositif contrôleur d'unité multidisque (10) comportant au moins deux ports logiques (port logique n· 0 port logique n· 3) permettant d'établir une interface avec un hôte (12) et doté d'un ou de plusieurs ports physiques (port physique n· 0 port physique n· 4). Chaque port physique est conçu pour permettre le raccordement d'au moins un lecteur de disque au contrôleur. Le contrôleur comporte un commutateur (26) qui établit des chemins de données dynamiquement configurables (30) entre les ports de données logiques et les ports de données physiques, en réponse aux contenus d'un registre de correspondance (24). Ce registre de correspondance définit un ensemble de lecteurs de disque souhaité en spécifiant une association entre chaque port logique et l'un des ports physiques. Il peut être agencé comme un registre de correspondance logique, avec un champ par port logique du contrôleur et possibilité d spécifier un ensemble supplémentaire pour des opérations RAID.

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