Hardware manual

Group Administration Basic volume operations
9–3
In addition, you can allow or disallow volume access from multiple initiators, depending on your configuration
needs. See Allowing or disallowing multi-host
volume access on page 9-14.
About volume data protection
Dell recommends that you use snapshot and replication functionality to protect volume data.
A snapshot is a point-in-time copy of volume data that can protec
t against mistakes, viruses, or database
corruption. You can recover data from a snapshot by setting it online or by restoring the volume from a snapshot.
See Snapshot management.
To protect against disasters, you can replicate volume data from one group to another.
A replica is a point-in-time
copy of volume data that is located on a different group and has no dependencies on the original volume. In the
event of a disaster, you can host the volume from the recovery group and later failback to the original group, with
minimal disruption to users. See Volume replication.
Recommendation: Dell recommend
s
that you protect data by using a robust backup application, in addition to
snapshot and replication functionality.
Volume attributes
Table 9-1 describes the attributes that allocate space and set the characteristics of a volume. The first column lists
volume attributes, and the second column describes
them.
You set some attributes when you create a volume; other at
tributes use default values. In most cases, you can
modify all the volume attributes. Template volumes and thin clones have some restrictions.
Table 9-1: Volume Attributes
Volume Attribute Description
Name Name, up to 63 alphanumeric characters (including period
s, hyphens, and colons), that identifies the
volume for administrative purposes. A volume name must be unique in a group.
The volume name appears at the end of the iSCSI targ
et name, which the group generates
automatically. Computer access to the volume is always through the iSCSI target name, rather than the
volume name.
See Modifying a volume name or description on pag
e
9-12.
Description Optional description for the volume - up to 127 ASCII
characters. See Modifying a volume name or
description on
page 9-12
Storage pool Name of pool for the volume. The group stores all the volum
e data on the pool members. The default is
the default pool.
Thin clones must reside in the same pool as the template volume. If you move a template volume to a
diff
erent pool, all the attached thin clones also move.
See Moving a volume to a pool on
page 7-5.
Reported size Reported size of the volume in MB, GB, or TB. The group rounds up volume sizes to the next 15MB if
the
size is not a multiple of 15.
You cannot change the reported size of a template volume.
See About volume space allocation on page
9-2.