RAID-1 Mirroring and Synchronous Replication
RAID-1, Client-Side High-Availability and Synchronous Replication
The StarPort Mirror device is a virtual RAID-1 array using 2 independent disks. Data is written simultaneously to both disks. This makes the device fault tolerant and protected from data loss in case of hardware or software fault, network faults and blackouts.Using StarPort you can build a mirror (RAID-1) based on a wide variety of devices and sources. Targets can be local or connected by any combination of iSCSI and Fibre Channel (FCoE and AoE in the upcoming version. If the Primary mirror fails, the duplicated copy of all the data maintained on the secondary mirror can be without any downtime. If needed, the broken mirror can also be hot swapped.
RAID-1 based on 2 remote targets:
RAID-1 built using one local iSCSI target device and a remote target:
Synchronous Mirroring to Remote Site with High Avaliability
Example 1 Below: Windows Application Server creates shared storage volume by running StarPort, which is writing to a local disk (data repository), and replicating via simultaneous writes to an iSCSI Target server (the Target server could be local for High Availability or remote for Disaster Recovery).
Example 2 Below: This example shows StarPort running within a virtual machine creating the volume that is issuing simultaneous writes. One write to disk is presented as local storage to the VM and the second is to the StarWind Target device. As with the first example, the second target can be local (that is on the same network) for fault tolerant storage or remote for a disaster recovery.
Offsite Replication with High Avaliability
Here StarPort is running on a Windows application server and is creating a volume from two StarWind Target devices. StarPort issues write commands to each StarWind Target. This is different from the examples above in that there are no local disk writes and both devices are remote. In this case, you can create fault tolerant storage by setting up two local StarWind Targets or one target locally and the other.
Manuals:
Download "Using Mirror (RAID1) disk device" in PDF
Browse "Using Mirror (RAID1) disk device" manual on-line
