What is Disk Duplexing?

Disk Duplexing is copying data from a source hard drive to multiple hard drives with the use of their own respective hard drive SCSI controller.  It is the process of duplicating data in different size of volumes to one or more hard drives to make storage fault tolerant.

What is Fault Tolerant Storage?

When a system or a component fails, there needs to be a backup plan to restore it, at the time of component failure, fault tolerant storage, helps to store a backup of the component and can be easily restored.  This is called fault tolerant storage?

Difference between Disk duplexing and Disk Mirroring?

Disk Mirroring is the process which writes data into one or more hard disks, helps to reduce the storage space of your hard drive with 100% data error retrieval.

Disk duplexing is basically a variation of disk mirroring. Disk duplexing is the process to copy data on two or more disks with their own hard disk controller. Both the process are similar but Disk duplexing has a slight advantage than disk mirroring, even though you take a mirror but the scsi controller fails your task is failed , disk duplexing deals with it in different way even when the duplex scsi controller is failed, it can take the data from other hard drives.

In disk duplexing while copying the data each controller will work separately   with each disk resulting in higher performance.

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