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PowerStore supports SCSI unmap. This feature allows operating systems to inform which data blocks are no longer in use and can be released for other uses. For space reclamation to work on volumes provisioned for ASM disks, both the Linux kernel and Oracle ASM must support the feature.
With trim/unmap enabled on a Linux mount point, significant wait time occurs when creating a file system that is more than a few TB in size on the PowerStore volume.