HP ProLiant DL580 G2, Руководство пользователя, Страница: 39 / 73

Permissions can then be granted to those shares based on users or groups
of users in each of the fi le sharing protocols.
Volume Shadow Copy Service Overview
The Volume Shadow Copy Service (VSS) provides an infrastructure for
creating point-in-time snapshots (shadow copies) of volumes. VSS supports
64 shadow copies per volume.
Shadow Copies of Shared Folders resides within this infrastructure and
helps alleviate data loss by creating shadow copies of fi les or folders that
are stored on network fi le shares at pre-determined time intervals. In
essence, a shadow copy is a previous version of the fi le or folder at a
speci fi c point in time.
By using shadow copies, a storage server can maintain a set of previous
versions of all fi les on the selected volumes. End users access the fi le or
folder by using a separate client add-on program, which enables them to
view the fi le in Windows Explorer.
Shadow copies should not replace the current backup, archive, or business
recovery system, but they can help to simplify restore procedures. For
example, shadow copies cannot protect against data loss due to media
failures, however, recovering data from shadow copies can reduce the
number of times needed to restore data from tape.
Detailed information on Shadow Copies can be found in the administration
guide.
Utilizing Storage Elements
No matter which type of storage element is created in the WebUI, the last
step in creating the element is determining its drive letter or mount point and
formatting the element. Each element created can exist as a drive letter(s),
assuming one is available and/or as mount points off of an existing folder
of a drive letter. Either method is supported. However, mount points can
not be utilized for shares that will be shared using Microsoft Services for
Unix (NFS). They can be setup with both but the use of the mount point in
conjunction with NFS shares causes instability with the NFS shares.
Formats consist of NTFS, FAT32, and FAT and all three types can be used
on the storage server. However, the Volume Shadow Copy Service can
only utilize volumes that are NTFS formatted. Also, quota management
is possible only on NTFS.
HP ProLiant Storage Server user guide 39