PRIMECLUSTER Global Disk Services Configuration and Administration Guide 4.1 (Linux)

A.1.1 Object Name

Users can name the following objects:

• Classes
• Disks (excluding shadow disk)
• Groups
• Volumes

The object name can contain a maximum of 32 alphanumeric characters, including the minus sign (-) and the underscore character (_). The object name cannot start with the minus sign (-) or the underscore character (_). Be sure to assign an alphanumeric character to the first character in the object name.

Class names must be unique within the entire cluster system and an attempt to create two or more classes with the same name will result in an error.

The other object names are unique within the class and an attempt to create more than one object with the same name in a class will result in an error.

GDS assigns slice names by combining the names of disks, groups, and volumes to which the slices belong. The slice naming conventions are as follows.

• When the slice is a mirror slice and exists in a disk that is connected directly to the highest level mirror group:

  disk_name.volume_name

• When the slice is a mirror slice and exists in a lower level group that is connected directly to the highest level mirror group:

  lower_level_group_name.volume_name

• When the slice belongs to a stripe volume:

  the_highest_level_stripe_group_name.volume_name

• When the slice belongs to a volume created within the highest level concatenation group:

  the_highest_level_concatenation_group_name.volume_name

• When the slice belongs to a switch volume:

  active_disk_name.volume_name

• When the slice is a single slice:

  single_disk_name.volume_name

Thus all object names can be identified uniquely within the entire cluster system by the combinations of the class names and the object names.

Shadow Disk Name

Name shadow disks according to the following rules:

• When the shadow disk is already registered with a class in another domain and managed as an SDX disk, assign the SDX disk name in said domain.
• When the shadow disk contains data copied from an SDX disk with the disk unit's copy function, assign the copy source SDX disk name.