Choosing a Raw Partition

Learn how to choose a raw partition.

1. Determine which raw partitions are available.
2. Determine the sizes of the raw partitions.
3. From the list of available raw partitions, select a raw partition for each device.
   
4. Verify with the operating system administrator that the partition you have chosen is available.
   
5. Make sure the “sybase” user has read and write privileges to the raw partition.
   
   Note: For more information on choosing a raw partition, see your operating system documentation.
   IO fencing provided by the SCSI-3 PGR feature operates on devices only, not on partitions. For example, /dev/sda1 and /dev/sda2 are partitions of the device /dev/sda. A fencing operating targeted to a raw device bound to /dev/sda1 will affect all partitions of /dev/sda. Therefore any file systems or other applications (including another Adaptive Server) utilizing partitions on that device will also be affected. For this reason the device must be used exclusively by the Adaptive Server cluster instance.
   Warning!  Adaptive server does not allow you to create database devices on the quorum device. In addition, if device partitions are used outside the cluster, any fencing performed by the cluster will deny access to those other partitions for the external applications or file systems placed on them.