StarWind Virtual SAN™ is a native Windows hypervisor-centric hardware-less VM storage solution. It allows creating VM-centric and high performing storage pool purpose built for the virtualization workloads. StarWind Virtual SAN delivers supreme performance compared to any dedicated SAN solution since it runs locally on the hypervisor and all IO is processed by local RAM, SSD cache, and disks and never bottlenecked by storage fabric. Also, StarWind Virtual SAN includes the Log-Structuring File System technology, which coalesces small random writes, typical for virtualized environment, into the stream of big sequential writes. As the result the performance is increased and the Flash life is prolonged.
This guide is intended for experienced Windows system administrators and IT professionals who would like to configure StarWind Virtual SAN solution. It provides detailed instructions on how to create, mount and delete the snapshots that were taken using Log-Structured File System device. Please note that this document assumes that you’ve got an LSFS device created. If you don’t know how to do it, consult the StarWind Virtual SAN built-in Help or refer to the corresponding guide from the technical papers section on StarWind website.
A full set of up-to-date technical documentation can always be found here, or by pressing the Help button in the StarWind Management Console.
1.Launch StarWind Management Console and connect to the server. Right click on LSFS device and select Snapshot Manager from the pop-up menu.
2. Click Create Snapshot button.
3. Enter snapshot name and write description. Click Create.
4. Snapshot is now created.
Snapshot mounting may come in handy when you need to restore the data that had been lost or deleted from the device. In addition, this option is beneficial for backup procedures. Mounting the snapshot and backing the data up from it is better than doing it directly from LSFS device which has its own workload.
1.To mount select right snapshot and click Mount Snapshot button.
2. Configure cache settings for snapshot. Click Next.
3. Choose a Target Attachment Method. You can Create new Target or Attach to existing Target.
3.1 If You Create new Target enter Target Alias. Click Next.
3.1.1 Click Create.
3.1.2 Click Close.
3.1.3 You will see a new target with a snapshot.
3.1.4 Note, that it is necessary to connect recently created target.
3.1.5 Open MS iSCSI Initiator and connect the corresponding target with snapshot.
ATTENTION: the connected device acquired from the mounting of snapshot will have the same identifier as the original device, so if you try to connect both on the same client, Windows will show an error. To counter this you should either use different clients or connect the snapshot target after turning the main device offline.
3.1.6 Open Disk Management and bring the device online.
3.1.7 After that the LSFS snapshot will be available in Read Only mode. And you may copy the necessary data.
3.2 In case of mounting the snapshot and selecting “Attach to existing Target” method, select target to which the snapshot should be attached.
3.2.1 Snapshot will be attached to existing target and connected to the client via the same iSCSI sessions.
3.2.2 In case the snapshot was connected to the same machine as the original LSFS device, to see its content you have to bring the original device offline and after that bring the snapshot device online.
WARNING: snapshot device has the same technical identifiers as original device. It is not recommended to bring online the connected target with snapshot which presents to the system as disk device and original disk device at the same time.
3.2.3 After that snapshot will be available in Read Only mode.
1.To delete the snapshot it must not be mounted. In other words it is impossible to delete snapshot which is in mounted state. To unmount the snapshot, remove the corresponding device in StarWind Management console. Right click on the snapshot device and click Remove Device.
2. After that it is possible to delete the snapshot.
3. Open Snapshot Manager, select snapshot and click Delete Snapshot button.