File sharing elements
The storage server supports several
fi
le sharing protocols, including Distributed File System (DFS), Network
File System (NFS), File Transfer Protocol (FTP), Hypertext Transfer Protocol (HTTP), and Microsoft Server
Message Block (SMB). On each folder or logical storage element, different
fi
le sharing protocols can be
enabled using speci
fi
c network names for access across a network to a variety of clients. 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.
Using storage elements
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, assuming one is available and/or as mount
points off of an existing folder or drive letter. Either method is supported.
Formats consist of NTFS, FAT32, and FAT. All three types can be used on the storage server. However,
VSS can only use volumes that are NTFS formatted. Also, quota management is possible only on NTFS.
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Storage management overview
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