Rollback; Snapshot Constraints - Overland Storage SnapSAN S1000 User Manual

SnapSAN S1000 User Guide
• Under Volume Configuration > Virtual Disks, click the menu button (▼) next to
• Under Volume Configuration > Snapshots, click the Scheduled Snapshots
2. Select the scheduled snapshot time interval of monthly, weekly, daily, or hourly.
Specific times within the overall time frame can be selected/deselected by clicking the
checkbox.
3. Click OK.
Snapshots are taken automatically based on the time interval selected. The last 32 snapshot
copies are kept (space permitting).
Tip: Daily snapshots are taken at midnight (00:00). Weekly snapshots are taken every Sunday at
midnight. Monthly snapshots are taken the first day of every month at midnight.

Rollback

CAUTION:
from cache to the disk drives first. The SnapSAN S1000 displays a message to remind the
user when they execute the rollback function.
The data in a snapshot can be used to roll back the existing information to the original
virtual disk data:
1. Select Volume Configuration > Snapshots.
2. Click the menu button (▼) next to the snapshot number that the user wants to roll the
data back for, and select Rollback.
The data in the virtual disk is rolled back to original data.

Snapshot Constraints

The Snapshot function applies Copy-on-Write technique on UDV/virtual disk and provides a
quick and efficient backup methodology. When taking a snapshot, it does not copy any data
at first time until a request of data modification comes in. The original data is copied to the
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the virtual disk number and select Scheduled Snapshots option.
button below the table.
Before executing rollback, it is better to dismount the file system to flush the data
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Snapshots
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