PRIMECLUSTER Global File Services Configuration and Administration Guide 4.2 (Solaris(TM) Operating Environment)

12.10.5 Notes on use of logical volumes of GDS

GDS is volume management software designed to improve the availability and operation manageability of information stored on disk units of a Storage Area Network (SAN). Various kinds of access control can be performed on the logical volumes of GDS to protect data against damage due to unauthorized access.

To use a logical volume of GDS in the GFS Shared File System, make the following settings:

• The type of disk class to which the logical volume belongs is shared.
• All nodes sharing the GFS Shared File System are specified in the scope of the disk cluster to which the logical volume belongs.
• When the attribute lock mode of the logical volume is lock=off, the volume is started automatically.
• The attribute access mode of the logical volume is set as read-write.

GFS Shared File System can be used only to active GDS logical volumes. When the GDS logical volumes are stopped, access is totally prohibited.

Don't use online volume expansion for the logical volume of GDS that is including GFS Shared File System. If the capacity of logical volume of GDS changes by online volume extension, it becomes impossible to mount the GFS Shared File System on this volume. In this case, please restore backup data to the same logical volume of size as before.
To increase the capacity of a GFS Shared File System, please create a new logical volume and perform a partition addition to the target file system.

For the operations of disk classes to which GDS logical volumes belong, refer to the description of class operations under "Operation using Global Disk Services Management View" in the "PRIMECLUSTER Global Disk Services Configuration and Administration Guide."

For the operations of logical volumes of GDS, refer to the description of volume operations under "Operation using Global Disk Services Management View" in the "PRIMECLUSTER Global Disk Services Configuration and Administration Guide."