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A PowerStore metro node virtual volume intended for ASM can be configured as a raw LUN or as a single partitioned LUN. If ASMLib is used to manage the LUN, the LUN must be configured as a single partitioned LUN. If ASMLib is not used, the LUN can either be configured as raw or as a single partitioned LUN by ASM. Choosing the type of LUN to use depends on the environment, infrastructure design, and daily operations.
When partitioning a LUN, align the partition on the 1M boundary. Use either fdisk or parted to create the partition. However, only parted can create partitions larger than 2 TB.
Before creating the partition, label the device as GPT. Then, specify the partition offset at 2048 sector (1M). The following command creates a single partition that takes up the entire LUN. After the partition is created, use the partition file /dev/mapper/ora-asm-data-001p1 to create the ASMLib volume.
# parted /dev/mapper/ora-asm-data-001
GNU Parted 3.1
Using /dev/mapper/ora-asm-data-001
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel gpt
(parted) quit
Information: You may need to update /etc/fstab.
or
# parted /dev/mapper/ora-asm-data-001 mkpart primary 2048s 100%
When creating a file system, create the file system on a properly aligned partitioned device.