DELL 32XX User Manual
other snapshot image. A snapshot image that is created before another snapshot image is a predecessor
relative to that other one.
relative to that other one.
A snapshot group repository virtual disk must satisfy a minimum capacity requirement that is the sum of
the following:
the following:
• 32 MB to support fixed overhead for the snapshot group and for copy-on-write processing.
• Capacity for rollback processing, which is 1/5000th of the capacity of the base virtual disk.
• Capacity for rollback processing, which is 1/5000th of the capacity of the base virtual disk.
The minimum capacity is enforcement by the RAID controller module firmware and the MD storage
management software.
management software.
When a you first create a snapshot group, it does not contains any snapshot images. When you create
snapshot images, you add the snapshot images to a snapshot group. Use the create snapImage
command to create snapshot images and add the snapshot images to a snapshot group.
snapshot images, you add the snapshot images to a snapshot group. Use the create snapImage
command to create snapshot images and add the snapshot images to a snapshot group.
A snapshot group can have one of these states:
Optimal
The snapshot group is operating normally.
Full
The snapshot group repository is full. Additional copy-on-write operations can not
be performed. This state is possible only for snapshot groups that have the
Repository Full policy set to Fail Base Writes. Any snapshot group in a Full state
causes a Needs-Attention condition to be posted for the storage array.
be performed. This state is possible only for snapshot groups that have the
Repository Full policy set to Fail Base Writes. Any snapshot group in a Full state
causes a Needs-Attention condition to be posted for the storage array.
Over Threshold
The snapshot group repository virtual disk usage is at or beyond its alert threshold.
Any snapshot group in this state causes a Needs-Attention condition to be posted
for the storage array.
Any snapshot group in this state causes a Needs-Attention condition to be posted
for the storage array.
Failed
The snapshot group has encountered a problem that has made all snapshot images
in the snapshot group unusable. For example, certain types of repository virtual disk
failures can cause a Failed state. To recover from a Failed state use the revive
snapGroup command.
in the snapshot group unusable. For example, certain types of repository virtual disk
failures can cause a Failed state. To recover from a Failed state use the revive
snapGroup command.
Create Snapshot Image
Description
This command creates a new snapshot image in one or more existing snapshot groups. Before you can
create a snapshot image, you must first have at least one snapshot group into which you can place the
snapshot image. To create a snapshot group use the create snapGroup command.
create a snapshot image, you must first have at least one snapshot group into which you can place the
snapshot image. To create a snapshot group use the create snapGroup command.
Syntax
create snapImage (snapGroup="snapGroupName" |
snapGroups=("snapGroupName1"... "snapGroupName2"))
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