Start disk compression

Compression increases the apparent capacity of disk units by encoding the data to take up less physical storage space. Compression does affect performance because of the overhead required to compress and decompress the data. You may choose to compress data that you access infrequently or that does not require high I/O performance rates. If you want to compress a nonconfigured disk unit or a disk unit in an independent disk pool that is unavailable, you can do so when your system is fully restarted. For all other disk pools, you need to restart your server to the DST mode before compressing them.

To start disk compression, follow these steps:

1. Expand All Disk Units.
2. Select the disk units that you want to compress.
3. Right-click a selected disk unit and select Start Compression.
4. Follow the instructions on the resulting dialog box to start compression on the selected disk units.