> RAID1 will only limit requests to 4K if the device beneath it is > non-contiguous - e.g. a striped array or LVM arrangement were consecutive > blocks might be on different devices. how does it know if a device is non-contiguous? Is there a way to have a dm device "marked" like that or force md to use bigger requests? Lets assume a host with about 20 raid1 devices consisting of dm-devices with the mentioned overhead - do you think that not splitting the requests could lead to a noticeable performance improvement? Thanx for your help, Ramon Schönborn -- Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de -- 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
