Overland Storage SnapServer Administrator's Manual page 103

SnapServer 7.0 Administrator's Guide
Snapshots and iSCSI Disks
Running a GuardianOS snapshot on a volume containing an iSCSI Disk will abruptly
disconnect any clients attempting to write to the iSCSI Disk and the resulting snapshot
may contain inconsistent data. Do not use GuardianOS snapshots on a volume containing
an iSCSI Disk.
To create a native snapshot of an iSCSI disk on Windows systems, use the VSS feature
described in
To Create a Snapshot
Follow these steps to create a snapshot:
Step 1: Create the snapshot definition.
Complete the following to define the snapshot:
• Name the snapshot (20 character maximum).
• Identify the source volume/storage pool.
Step 2: Specify when to create the snapshot.
Click either the Create Snapshot Now button to run the snapshot immediately or the
Create Snapshot Later button to schedule the Snapshot for a later time.
When you select the Create Snapshot Later button, a new input section appears below the
option. Complete the following:
• Schedule a start date and start time to run the snapshot.
• Select either to create the snapshot only once (One Time) or to have it recurring.
To repeat a snapshot periodically using the Recurring option, specify the repeat
interval in hours, days, weeks, or months.
Step 3: Specify the duration of the snapshot.
In the Duration field, specify how long the snapshot is to be active in hours, days, weeks,
or months. The SnapServer automatically deletes the snapshot after this period expires,
as long as no older unexpired snapshots exist that depend on it. If any such snapshot
exists, its termination date is displayed at the bottom of the page. You must set the
duration to a date and time after the displayed date.
Step 4: Specify whether to create a recovery file.
If you plan to create a backup from the snapshot and want to save filesystem security
configuration in the backup, check the Create Recovery File box. (See the
Snapshots" on page 6-5
operations.)
Step 5: Create the snapshot.
Click Create Snapshot. If you elected to run the snapshot immediately, it appears in the
Current Snapshots table. If you scheduled the snapshot to run at a later time, it appears
in the Scheduled Snapshots table.
Accessing Snapshots
After snapshots are created, they can be accessed via a snapshot share. Just as a share
provides access to a portion of a live volume (or filesystem), a snapshot share provides
access to the same portion of the filesystem on all current snapshots of the volume. The
10400317-001 10/2011
"Configuring VSS/VDS for iSCSI Disks" on page
for information on coordinating snapshots and backup
©2010-11 Overland Storage, Inc.
6 – Other Storage Options
6-22.
"Schedule
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