6.0 HP X9000 File Serving Software File System User Guide (TA768-96043, October 2011)

deletion. Users can access the filesystem or directory as it appeared at the instant of the
snapshot. See “Creating X9000 software snapshots” (page 126).
• Block Snapshots. This feature uses the array capabilities to capture a point-in-time copy of a
file system for online backup purposes and to simplify recovery of files from accidental deletion.
The snapshot replicates all file system entities at the time of capture and is managed exactly
like any other file system. See “Creating block snapshots” (page 135).
• Data tiering. This feature allows you to set a preferred tier where newly created files will be
stored. You can then create a tiering policy to move files from initial storage, based on file
attributes such as such as modification time, access time, file size, or file type. See “Using
data tiering” (page 147).
• File allocation. This feature allocates new files and directories to segments according to the
allocation policy and segment preferences that are in effect for a client. An allocation policy
is an algorithm that determines the segments that are selected when clients write to a file
system. See “Using file allocation” (page 155).
Accessing file systems
Clients can use the following standard NAS protocols to access file system data:
• NFS. See “Using NFS” (page 44) or more information.
• CIFS. See “Using CIFS” (page 57) for more information.
• FTP. See “Using FTP” (page 75) for more information.
• HTTP. See “Using HTTP” (page 83) for more information.
You can also use X9000 clients to access file systems. Typically, these clients are installed during
the initial system setup. See the HP 9000 File Serving Software Installation Guide for more
information.
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