Adaptec 5325301507 Administration Guide - Page 130

Adjusting Snapshot Pool Size Adjusting Snapshot Pool Size The current size of the snapshot pool for each RAID (or RAID group) can be viewed by navigating to the Storage > Snapshots screen and clicking the Snapshot Space button, then clicking the Raid Set. On the screen that opens, you can adjust the size of the pool as necessary. In addition, there are two other processes that may affect the size of the snapshot pool: • Creating a Volume - In the course of creating a new volume, a pull-down menu allows you to add a percentage of the capacity being allocated to the new volume to the snapshot pool. This feature defaults to 20 percent, the recommended amount of space to reserve for snapshots. If you do not plan to use snapshots with this volume, maximize volume capacity by reducing this percentage to zero; if you do plan to use snapshots, adjust this percentage in accordance with the guidelines discussed in the previous section Estimating Snapshot Pool Requirements. • Creating a RAID Group - When two RAIDS are grouped, their snapshot pools are added together. For example, if RAID A with a snapshot pool of 50 GB is grouped with RAID B with a snapshot pool of 25 GB, the resulting RAID group will have a snapshot pool of 75 GB. Depending on the purpose you had in mind when grouping the RAIDs, the result of combining the two snapshot pools may or may not be desirable, and you will need to readjust the size as described previously. Accessing Snapshots Snapshots are accessed via a snapshot share. Just as a share provides access to a portion of a live volume (or file system), a snapshot share provides access to the same portion of the file system on all current snapshots of the volume. The snapshot share's path into snapshots mimics the original share's path into the live volume. Creating a Snapshot Share You create a snapshot share by selecting the Create Snapshot Share option in the course of creating a live-volume share, under the Advanced Share Properties link. For example, assume you create a share to a directory called "sales," and you select the Create Snapshot Share option. When you connect to the server via Internet Explorer or other file browser, two shares display: SALES SALES_SNAP The first share provides access to the live volume, and the second share provides access to any archived snapshots. Other than read-write settings (snapshots are 114 SnapServer Administrator Guide