Administrator Guide

Data Eligible for Data Reduction
To reduce the impact of data reduction on read and write operations, a limited amount of data is eligible for compression and deduplication.
Data Reduction Input limits the type of data that is eligible for data reduction. The following options are available for Data Reduction Input:
• Inaccessible Snapshot Pages – Allows Data Reduction to process data frozen by a snapshot and made inaccessible by new data
written over the original data in the snapshot.
• All Snapshot Pages – Allows Data Reduction to process data frozen by a snapshot.
Change the Data Reduction Input
Change the type of data that compression and deduplication reduces.
Prerequisite
Data Reduction must be applied to the volume.
Steps
1 If the Storage Manager Client is connected to a Data Collector, select a Storage Center from the Storage view.
2 Click the Storage tab.
3 In the Storage tab navigation pane, select a volume.
4 In the right pane, click Edit Settings. The Edit Volume dialog box opens.
5 Click Edit Advanced Volume Settings.
The Edit Advanced Volume Settings dialog box opens.
6 In the Volumes view, select the volume you want to modify.
7 From the Data Reduction Input drop-down menu, select a Data Reduction input.
• Inaccessible Snapshot Pages – Data frozen by a snapshot that has become inaccessible because other data has been written
over it
• All Snapshot Pages – Data frozen by a snapshot
8 Click OK to close the Edit Advanced Volume Settings dialog box.
9 Click OK.
Supported Hardware Platforms
The following controller series support Data Reduction:
• SCv3000 Series (Supports Compression only)
• SC4020
• SC5020
• SC5020F
• SC7020
• SC7020F
• SC8000
• SC9000
Storage Center Administration
137