Adaptec Snap Server 700i Series, User Manual

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Backing Up Your Data with Mirrored Volumes
Chapter 6 Protecting Your Data 73
4
Click the down arrow button to lower that logical device’s priority from mirror
manager to mirror plex.
The two logical devices exchange priorities—the original mirror manager
becomes the mirror plex.
5
Click
OK
to complete the change.
The Job Manager opens (see page 109) and the job begins.
Failing Over a Mirrored Volume
When a data-access problem occurs on a mirrored volume, failover (from the
original volume to the mirror) occurs automatically. You can also force a failover.
You might want to do this if:
• You want to test the failover setup.
• You need to take the volume (or mirror manager) off-line for maintenance.
• You want to change the mirror priority. (See “Changing Mirror Priorities” on
page 72 for an alternative to failover.)
Note
You can’t fail over a mirrored volume unless the mirror is fully synchronized.
To fail over a mirrored volume:
1
In the Enterprise View, select the iSCSI Storage Host you want.
2
In the Volumes View, right-click the mirrored volume you want, then select
Fail
over mirror
.
3
Click
Yes
to fail over the mirror.
The mirror is failed over. Any system that was accessing the original volume
automatically begins to access the mirror instead.
Failing Back a Mirrored Volume
When a data-access problem occurs on a mirrored volume, failover (from the
original volume to the mirror) occurs automatically. Use Adaptec Storage Manager
to fail back the mirrored volume and restore the original volume to mirror manager
after the problem has been solved.
Note
You can’t fail back a mirrored volume unless the mirror is synchronized.
To fail back a mirrored volume:
1
In the Enterprise View, select the iSCSI Storage Host you want.
2
In the Volumes View, right-click the mirrored volume you want, then select
Fail
back mirror.