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When a host is attached to a PowerStore block volume, the host can use this volume as a raw device, or it can create a local file system on the volume first. When a local file system is being created, it is recommended to disable SCSI unmap. When PowerStore creates a volume, all space is already unmapped; the host-based unmap is redundant and generates unnecessary load on PowerStore.
When creating a local file system, it is recommended to use a file system block size (allocation unit) that is an even multiple of 4 KB.
It is typically not necessary to perform alignment when creating a local file system. If alignment is performed, it is recommended to use an offset of 1 MB.