On 11/20/2016 09:48 AM, Wols Lists wrote: > On 20/11/16 00:27, Phil Turmel wrote: >> Yes. But the new stripes lay on top of the old stripes, unless you move >> the data offset. Which is why a backup file holds the old stripe just >> in case. If you can move the offset, you use the lower offset for the >> lower addresses in the array, and the higher offset for the higher >> addresses, on either side of the reshape position. > > Okay, understood. So v0.9 and v1.0 always need a backup for a reshape. > > But if we have a data offset with v1.2, a reshape will use that space if > it can rather than needing a backup file? If there's room to move the entire data area (direction varies with operation), yes. > (And changing topic slightly, that space is also used for an internal > bitmap?) And bad block log. Phil -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
