Cache properties

If you call up the Properties command in the context menu of the write cache and click the "General Cache" tab, you will see the following dialog box:

Figure: "Cache Properties" dialog box, "General Cache" tab (example)

General Cache tab

Backup time window

Check the Allow backup field and enter the times during which the SM processes are paused so that backups can be made during this time.

Write/read cache monitoring

To improve the performance of the overall system, you can set a mandatory pause for the continual background processes. The minimum entry is 7 ms.

BitShifts

BitShifts option group:
With the BitShift (cache) value, you can set the number of subdirectories with which the Storage Manager works in the cache. The default setting of "5" causes the Storage Manager to work with (25) x (25) directories (i.e. 1,024). The number of files stored in each directory determines the speed at which the operating system can access the file structure.

With the BitShift (media) value, you can set the number of subdirectories with which the Storage Manager works on media. The parameter should be identical to that of the cache.

The BitShift parameters may no longer be changed after the system is set up.

Mode

This dialog box is not evaluated.

Files which have already been archived on a medium can no longer be edited. Files located on a closed volume which has not yet been burned also can no longer be edited. If a user makes changes or additions to archived files, a new file version – and therefore a new file – is always created and archived. It is entirely possible for the various different file versions of an archived file to be located on different volumes and/or media.

Migration path

For the migration of data from CD to DVD, the data on the CD is compiled into virtual DVD volumes and copied to the hard drive so that it can be burned to DVD blanks from there. The path set here indicates the path to the data temporarily located on the hard disk which is awaiting migration.