Dell EqualLogic PS6210XS EqualLogic Group Manager Administrator s Guide PS Ser - Page 35

Table 7. Volume Attributes describes the attributes that allocate space and set the characteristics of a volume. Table 7. Volume Attributes Volume Attribute Description Name Volume name is unique in the group. The volume name appears at the end of the iSCSI target name, which the group generates automatically. Computer access to the volume is always through the iSCSI target name, rather than the volume name. Description Storage pool Optional description for the volume - up to 127 characters. Fewer characters are accepted for this field if you type the value as a Unicode character string, which takes up a variable number of bytes, depending on the specific character. Name of pool for the volume. The group stores all the volume 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 different pool, all the attached thin clones also move. Reported size Thin provisioning settings 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 15MB. You cannot change the reported size of a template volume. Controls whether the volume is thin provisioned and, if so, the minimum and maximum volume reserve and the in-use space warning limit. The defaults are no thin provisioning and the groupwide volume settings. Snapshot reserve Optional amount of space to reserve for snapshots of the volume, based on a percentage of the volume reserve. The default is the groupwide snapshot reserve setting. If data reduction has been enabled on the volume, snapshot reserve is permanently disabled. iSCSI alias Name that some iSCSI initiators display. Use the alias to identify the iSCSI target. The default is the groupwide volume setting. Permission Indicates whether the volume is read-write (the default) or read-only. You cannot set a template volume to read-write permission. Administrative status Indicates whether the volume is online (the default) or offline. Initiators cannot discover or connect to an offline volume. Access controls Conditions that hosts must meet to access the volume and its snapshots. To allow volume or snapshot access, you must create at least one access control policy. You can create the policy when you create a volume or after you create the volume. Administrator You can assign a volume to a specific volume administrator. Multihost access setting Indicates whether the volume allows or disallows (default) access from initiators with different IQNs. iSNS discovery setting By default, iSNS servers cannot discover iSCSI targets in a group. To allow discovery by iSNS servers, you must enable this functionality on a volume or snapshot. RAID preference RAID policies are established on a per-member basis. You can override this policy by enabling a RAID level preference for individual volumes. Thin clones inherit the RAID preference of the template volume. Sector size Size of the sector. The sector size of a volume does not depend on the sector size of the physical drives in the array. The default volume setting of 512 bytes is almost always optimal, even if the physical drives use 4K-byte sectors. You cannot change the sector size after creating the volume. Architecture Fundamentals 35