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? (And changing topic slightly, that space is also used for an internal bitmap?) Cheers, Wol -- 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
