Disk mirroring data storage (1 résultats)

Taschenbuch. Etat : Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Please note that the content of this book primarily consists of articlesavailable from Wikipedia or other free sources online. In data storagedisk mirroring or RAID1 is the replication of logical disk volumes ontoseparate physical hard disks in real time to ensure continuousavailability. A mirrored volume is a complete logical representation ofseparate volume copies. In a Disaster Recovery context, mirroring dataover long distance is referred to as storage replication. Depending onthe technologies used, replication can be performed synchronouslyasynchronously, semi-synchronously, or point-in-time. Replication isenabled via microcode on the disk array controller or via serversoftware. It is typically a proprietary solution, not compatible betweenvarious storage vendors. Mirroring is typically only synchronous.Synchronous writing typically achieves a Recovery Point Objective ofzero lost data. Asynchronous replication can achieve an RPO of just afew seconds while the remaining methodologies provide an RPO of a fewminutes to perhaps several hours. Mirroring is different from fileshadowing.…