![background image](http://html.mh-extra.com/html/blue-arc/titan-siliconserver/titan-siliconserver_system-administration-manual_2775403341.webp)
Data Protection
329
Titan SiliconServer
Specifying File Names
A file name comprises the name of an NFS export or CIFS share followed by a sub-path. Note
that file and directory names in an NFS export are case-sensitive, but those in a CIFS share are
not. Here are some examples:
❑
/nfsroot/dir1/dir2/file1
Specifies the file dir1/dir2/file1 under the NFS export /nfsroot.
❑
/ntroot/nt_dir (or /NTROOT/NT_DIR)
Specifies the file nt_dir under the CIFS share /ntroot.
Special prefixes can be used to further define the file or directory path. If no NFS export or CIFS
share is available the path can be based on the volume name as:
/__VOLUME__/volname/subpath
If the name of an NFS export is the same as that of a CIFS share, a file name clash may occur.
This can be avoided by adding a unique prefix to the name. For example, if /root is both an
export and a share, differentiate between the two as follows:
/__EXPORT__/root
/__SHARE__/root
In each case, there are two underscores before and after the prefix keyword, which must be in
uppercase characters.
Important Notes
❑
NDMP does not specify the format of the backup data on tape. As a result, it is not possible
to use NDMP backups to exchange data with other types of servers.
❑
An incremental or differential backup, back up changes made since a previous base backup.
When asked to do an incremental or differential backup the NDMP code refers to the record
of backups to check for such a base backup to compare against. If there is such a backup,
and it was a backup of a snapshot, and that snapshot still exists on the system, then the
NDMP code executes a “Comparative Incremental” backup, using the original snapshot to
identify changes. If the base backup was not of a snapshot, or its snapshot has been deleted,
then the only information the code has is the date/time of the backup, and so a “Date-Based
Incremental” backup is done.
❑
Since the Date-Based incremental backup has no record of the files backed up in the
original backup, it cannot identify files that have been deleted in the intervening period.
Similarly, if a directory has been moved there is no way of knowing that the contents of the
moved directory have changed. Therefore contents of moved directories will not be backed
up unless the individual files have themselves changed.”