On Mon, Jan 15, 2018 at 05:37:44PM +0100, Ancor Gonzalez Sosa wrote:
Storage-ng always tries to align the start and end of all new and resized partitions for optimal performance.
AFAIS the end is only aligned to not produce gaps between partitions.
In DASD, the typical REQUIRED grain is 48KiB, so no way we can create a partition whose size is not divisible by that number. In addition, the OPTIMAL grain is 3MiB.
The optimal grain is 3 MiB since it divides by 1 MiB and 48 KiB.
The point is that I'm not so sure whether aligning the end makes that much sense from the performance POV if a given partition is at the very end of the partition table.
I don't think it is important for performance.
In general I would not align the end of the last partition and
thus avoid unused space at the end. I personally do not mind that
little wasted space but other people might be picky about it
(e.g. if other partitioning tools report a tiny piece of unused
space).
ciao Arvin
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Arvin Schnell,