Check the Vault Store Partition in question and ensure it has available space to complete the operation.  If you need to create or extend NTFS volume sets to accommodate the partition, use the
Windows Administrative Tools.

 

The amount of space you will require for your vault stores depends on the following:

 

■ The average size of items that you anticipate archiving.

 

■ The number of items you anticipate archiving in a day to that vault store.

 

■ The reduction in archive storage space due to single instance storage.

 

■ The reduction in storage space due to compression of files.

 

■ How often you anticipate archiving items from the Archiving Target.

 

■ How long you anticipate archived items remaining in the vault store.

 

Note: When using collections additional space is needed to allow a saveset to be extracted from a collections file for retrieval or restore operations.

 

To estimate the amount of space used:

 

1. Multiply the number of items to be archived by 16 KB to get the total size of the DVS files. Count all messages, including those with attachments. These are the files that are not shared.

 

2. Take 60% of the size of attachments (or 90% where the mix of attachments is mostly Office 2007 or later documents). This is the size of attachments after compression. A rule of thumb is that 20% of files have attachments, and the average attachment size is 250 KB.

 

3. Divide by the number of sharers of each attachment across the vault store group. This is the size of the DVSSP files after sharing.
 

4. Take 5% of the size of DVSSP files. This is the size of the DVSCC files.

 

The total space used is the sum of the DVS, DVSSP and DVSCC files.  If items in the mailboxes have already been journaled, and the journal and mailbox partitions participate in sharing within a vault store group, the shared parts have already been stored and will not be stored again. The only additional space is that used to store the DVS files. There are some exceptions to this rule, and some extra DVSSP files may be created.  If items are archived to more than one partition, more shared parts will be stored on the partition where the archiving task runs first. Some partitions may grow faster than others.

 

Note: These recommendations do not apply to Centera, which uses a completely different sharing model.