HP ProLiant DL100 G2 Data Protection Storage Server administration guide (June 2006)

File sharing ele
ments
The stor age ser
ver supports several file sharing protocols, including Distributed File System (DFS) , Network
File System (NF
S), File Transfer Protocol (FTP), Hypertext Transfer Protocol (HTTP), a nd Microsoft Ser ver
Message Blo ck (SMB). On each folder or logical storage element, different file sharing protocols can be
enabled using specific network names for access across a network to a var iety of clients. Permissions can
then be granted to those shares based on users or g roups of users in e a ch of the file sharing protocols.
Volume Shadow Copy Service overview
The Volume Shadow Copy Service (VSS) provides an infrastructure for creating point-in-time snapshots
(shadow c opies) 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 files or folders that are stored on network file shares at pre-determined time
intervals. In essence, a sha dow co py is a previous version of the file or folder at a specificpointintime.
By using shadow copies, a storage server can m aintain a set of previous versions of all files on the
selected volumes. End users access the file or folder by using a separate client add-on program, which
enables them to view the file in Windows Explorer.
Shadow copies should not replace the current backup, archive, or business recovery system, but they
can help to simplif y restore procedures. For example, shadow copies cannot p rotect 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 mou nt point and formatting the
element. Each elem ent created can exi st 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 c onsist of NTFS, FAT32, and FAT. All three types can be used on the storage ser ver. 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