Microsoft volume shadow copy service, Supported vss components – HP 3PAR Recovery Manager Software User Manual

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Performing a restore on a Windows Fibre channel based host that resides in virtual environment

Performing a mount, an unmount, or a restore function in RDM (Raw Device Mapping) disk
and passthrough disk

Customizing date format

Recovery Manager supports date format in month/day/year

Windows auto-mount feature if the database or an instance LUN is on a mountpoint residing
on a mountpoint volume.

NOTE:

Virtualization support

Windows Hyper-V:

Only iSCSI LUNs are supported.

Pass-through Disks are not supported.

Virtual fiber channel is supported.

VMware ESX

Only iSCSI and VM Direct path is supported.

Raw device mapping is not supported.

Microsoft Volume Shadow Copy Service

Microsoft includes Volume Shadow Copy Service (VSS) in Windows to simplify the enterprise’s
storage environment. VSS provides a framework for creating a point-in-time copy of either a single
volume or multiple volumes.

Microsoft Windows Server VSS works with VSS-aware applications that are used to determine
when a volume shadow copy (snapshot) can be made. (A snapshot is a virtual copy: a copy of
some data set—for example, a disk volume—at a point in time.) Before making a snapshot, VSS
communicates with the operating system and applications to freeze computing tasks, which enables
an application-consistent snapshot to be taken. The shadow copy volume is then used for the actual
backup. After VSS saves the shadow copy volume on the backup device, it deletes the shadow
copy.

VSS coordinates between Requestors (backup applications such as Recovery Manager), Writers
(applications in windows services such as Microsoft SQL Server) and Providers (components that
create the shadow copies).

VSS Component Description

VSS Component

The requestor is the backup software that initiates the
creation of the shadow copy.

Requestor

The writer is any application software that participates in
the shadow copy process and whose files and data are
included in the process.

Writer

The provider is the storage technology that does the actual
shadow copy.

Provider

Supported VSS Components

Requestor:

Recovery Manager

Symantec NetBackup for Microsoft Windows

Microsoft Volume Shadow Copy Service

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