Lenovo ThinkServer RD330, Руководство пользователя программного обеспечения, Страница: 137 / 401

Page 137
MegaRAID SAS Software User Guide Chapter 4: WebBIOS Configuration Utility
|
Using MegaRAID Recovery
Figure 91: Expand Virtual Drive Screen
3. Enter the percentage of the available capacity that you want the virtual drive to use.
For example, if there are 100 GB of capacity available and you want to increase the
size of the virtual drive by 30 GB, select 30 percent.
4. Click Calculate to determine the capacity of the virtual drive after expansion.
5. Click Ok .
The virtual drive expands by the selected percentage of the available capacity.
4.10 Using MegaRAID
Recovery
MegaRAID Recovery, also known as Snapshot, offers a simplified way to recover data
and provides automatic protection for the boot volume. You can use the Recovery
feature to take a snapshot of a volume and to restore a volume or file. Snapshot
functionality allows you to capture data changes to the volume, and, if data is deleted
accidentally or maliciously, you can restore the data from the view or roll back to a
snapshot at a previous point-in-time (PiT). MegaRAID Recovery supports up to eight
snapshots of PiTs for each volume.
Each Recovery PiT volume snapshot is typically a fraction of the original volume size,
because it tracks only the changes that are made to a volume after the PiT is created.
Disk space for PiTs is reserved in the Snapshot Repository virtual drive, and the PiT is
expanded in small increments as new data is written to the volume. Multiple PiTs of
each volume can be retained online, enabling frequent snapshots to be stored in a
space-efficient manner.