Tuning Archive Media Writes

The following table describes the menus and fields in the Tuning Archive Media Writes section of the Policy Copy Details page.

Table 56 Menus and Fields in Tuning Archive Media Writes Section

Field

Description

Drives to Use

The largest number of drives to be used when files associated with this policy are archived.

Maximum Per Drive

The amount of data to be archived by one drive. If the data to be archived is less than this amount, only one drive is used.

Multi-Drive Trigger

The largest amount of data to be archived by one drive. If the size of the data exceeds this value, multiple drives, up to the number of drives available, will be used.

Offline Copy Method

The method by which files that are offline at the time of archiving are processed:

  • Stage files back as they are needed - Files are staged as needed for each archive file before being copied to the archive volume.

  • Copy them directly from offline media - Files are copied directly from the offline volume to the archive volume without using the cache. This method assumes that the source volume and the archive volume are two different volumes and that two drives are available.

  • Stage one file ahead of the current copy - The next archive file is staged while the current archive file is written to its destination. This method assumes that two drives are available and that space is available on cache for all files in one archive file.

  • Stage them all back first - All files are staged before archiving. This method assumes that only one drive is used and that space is available on cache for all files.

Minimum Size for Overflow

The minimum size of an archive file that requires more than one volume.

Maximum Size for Archive

The maximum size for an archive file.

Memory Buffer Size

A numeric value, between 2 and 1024, that is used to calculate the size of memory buffer used for archiving. To determine the buffer size, the value specified is multiplied by the block size of the archive media.

Lock the Buffer During Copying

An option that locks the memory buffer during copy operations. Enable this option only if the system has enough memory to support it.