On Tuesday October 17, davidsen@xxxxxxx wrote: > We talked about RAID5E a while ago, is there any thought that this would > actually happen, or is it one of the "would be nice" features? With > larger drives I suspect the number of drives in arrays is going down, > and anything which offers performance benefits for smaller arrays would > be useful. So ... RAID5E is RAID5 using (N-1)/N of each drive (or close to that) and not having a hot spare. On a drive failure, the data is restriped across N-1 drives so that it becomes plain RAID5. This means that instead of having an idle spare, you have spare space at the end of each drive. To implement this you would need kernel code to restripe and array to reduce the number of devices (currently we only increase the number of devices). Probably not too hard - just needs code and motivation. Don't know if/when it will happen, but it probably will .... especially if someone tries writing some code (hint hint to any potential developers out there...) NeilBrown - 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
