Adaptec 2005S User Guide - Page 97

Creating a Snapshot, Snapshot Limitations

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Chapter 10: Protecting Your Data ● 96 Creating a Snapshot Note: Snapshot is an upgrade feature; if the Snapshot feature is locked, see Adding Enhanced Features on page 21 for information on purchasing a feature key. A snapshot is a frozen image of a logical drive at a particular point in time. You can copy the data on one logical device to another logical device by creating a snapshot. You may want to do this if you want to back up your data to tape, clone a drive, or copy the data to multiple servers. There are two snapshot options: ● Snapshot Backup-Copies all data on a logical drive so that it can be moved from one server to another. See page 97. ● Snapshot Nobackup-Creates a temporary copy of a logical drive for tape backup and reference (uses less system resources than Snapshot Backup). Snapshot Limitations ● You can create a snapshot of only one controller at a time; you can't create a snapshot that includes multiple controllers. ● The source logical drive (the logical drive that you're copying) and the target logical drive (the logical drive that you're copying to) must be on the same controller. ● The source and target logical drives may have the same or different RAID levels. ● You can create up to four snapshots on each controller. ● The size of the target logical drive must be greater than or equal to the size of the source logical drive. ● You can't modify any information on a snapshot.

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Chapter 10: Protecting Your Data
●
96
Creating a Snapshot
Note:
Snapshot is an upgrade feature; if the Snapshot feature is locked,
see
Adding Enhanced Features
on page 21
for information on
purchasing a feature key.
A
snapshot
is a frozen image of a logical drive at a particular point in
time. You can copy the data on one logical device to another logical
device by creating a snapshot. You may want to do this if you want to
back up your data to tape, clone a drive, or copy the data to multiple
servers.
There are two snapshot options:
●
Snapshot Backup
—Copies all data on a logical drive so that it can be
moved from one server to another. See
page 97
.
●
Snapshot Nobackup
—Creates a temporary copy of a logical drive
for tape backup and reference (uses less system resources than
Snapshot Backup).
Snapshot Limitations
●
You can create a snapshot of only one controller at a time; you can’t
create a snapshot that includes multiple controllers.
●
The
source
logical drive (the logical drive that you’re copying) and
the
target
logical drive (the logical drive that you’re copying to) must
be on the same controller.
●
The source and target logical drives may have the same or different
RAID levels.
●
You can create up to four snapshots on each controller.
●
The size of the target logical drive must be greater than or equal to
the size of the source logical drive.
●
You can’t modify any information on a snapshot.